CMR MCQ Test

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Select one answer for each question. Each correct answer carries 1 mark; wrong and unattempted answers carry 0 marks. Submit the exam to view your score, correct answers, and explanations.

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Mine Plans, Sections and Access

Question 1 of 137

Every plan or section prepared or submitted under the regulations shall specify the:

A) Name of the mine only B) Name of the mine and the owner, and the purpose for which the plan is prepared C) Name of the manager only D) Name of the surveyor only

Correct answer: B) Name of the mine and the owner, and the purpose for which the plan is prepared
Explanation: Every statutory mine plan or section must clearly mention the name of the mine, name of the owner, and the purpose for which the plan has been prepared.

Question 2 of 137

Every statutory mine plan or section shall show:

A) Grid north only B) Magnetic meridian only C) True north or the magnetic meridian, along with the date of the latter D) East-West direction only

Correct answer: C) True north or the magnetic meridian, along with the date of the latter
Explanation: The plan must indicate True North or the Magnetic Meridian. If the magnetic meridian is shown, the date of observation must also be mentioned because magnetic north changes over time.

Question 3 of 137

The minimum length of the scale shown on every mine plan shall be:

A) 10 cm B) 15 cm C) 20 cm D) 25 cm

Correct answer: D) 25 cm
Explanation: Every statutory mine plan must include a graphic scale that is at least 25 cm long and suitably subdivided for accurate measurement.

Question 4 of 137

Unless otherwise provided, the representative factor (RF) of a mine plan shall be:

A) 500:1 or 1000:1 B) 1000:1 or 1500:1 C) 2000:1 or 1000:1 D) 2500:1 or 5000:1

Correct answer: C) 2000:1 or 1000:1
Explanation: The standard scale prescribed for mine plans is RF 2000:1 or 1000:1, unless another scale is specifically provided in the regulations.

Question 5 of 137

Plans and sections maintained under the regulations shall be corrected and kept up-to-date, but not earlier than:

A) 1 month B) 2 months C) 3 months D) 6 months

Correct answer: C) 3 months
Explanation: All statutory mine plans and sections must be maintained corrected and updated, ensuring that the information is not older than three months.

Question 6 of 137

The underground plan shall show every important surface feature lying within _____ of any part of the workings.

A) 50 m B) 100 m C) 200 m D) 500 m

Correct answer: C) 200 m
Explanation: The underground plan must include all important surface features such as railways, roads, rivers, streams, watercourses, tanks, reservoirs, opencast workings, and buildings located within 200 metres of any underground workings.

Question 7 of 137

Which of the following is NOT required to be shown on an underground plan?

A) Railway B) Reservoir C) Building within 200 m of workings D) Monthly coal production

Correct answer: D) Monthly coal production
Explanation: The underground plan must show nearby surface features, but monthly production is not part of the statutory plan requirements.

Question 8 of 137

When the average inclination of a seam exceeds _____ from the horizontal, one or more vertical mine sections may be required.

A) 20° B) 25° C) 30° D) 45°

Correct answer: C) 30°
Explanation: If the average seam inclination is more than 30°, the Regional Inspector may require one or more vertical mine sections showing vertical projections of the workings.

Question 9 of 137

In an opencast mine, vertical mine sections shall be prepared at intervals not exceeding:

A) 50 m B) 75 m C) 100 m D) 200 m

Correct answer: C) 100 m
Explanation: For opencast workings, vertical mine sections showing longitudinal and transverse projections must be maintained at suitable intervals not exceeding 100 metres, irrespective of seam inclination.

Question 10 of 137

A joint survey plan shall be signed by:

A) Surveyor only B) Manager only C) Surveyor and Manager of the mine and adjoining mines concerned D) Chief Inspector only

Correct answer: C) Surveyor and Manager of the mine and adjoining mines concerned
Explanation: The joint survey plan must be signed by the surveyor and manager of the mine as well as adjoining mines to certify the correctness of the common or disputed boundary.

Question 11 of 137

A joint survey plan is required where adjoining workings are within:

A) 30 m B) 50 m C) 60 m D) 100 m

Correct answer: C) 60 m
Explanation: A joint survey plan is mandatory when workings are within 60 metres of the common boundary, or within 60 metres of a disputed boundary.

Question 12 of 137

The water-danger plan shall show rivers, lakes, nullahs, ponds and other water bodies existing up to _____ of the mine boundary.

A) 100 m B) 150 m C) 200 m D) 500 m

Correct answer: C) 200 m
Explanation: All surface and underground water bodies within 200 metres of the mine boundary must be shown on the water-danger plan.

Question 13 of 137

Every water-logged working or source of water lying within _____ of any part of the workings shall be shown on the water-danger plan.

A) 30 m B) 50 m C) 60 m D) 100 m

Correct answer: C) 60 m
Explanation: Water sources such as rivers, reservoirs, streams, water-logged opencast workings, and underground water-logged workings lying within 60 metres of mine workings must be indicated.

Question 14 of 137

Surface contour lines on statutory plans shall normally be drawn at vertical intervals not exceeding:

A) 2 m B) 5 m C) 10 m D) 20 m

Correct answer: B) 5 m
Explanation: Surface contour lines are generally drawn at vertical intervals not exceeding 5 metres to accurately represent ground topography.

Question 15 of 137

In mines having no underground workings or situated in hilly terrain, contour intervals may be increased to:

A) 5 m only B) 10 m or such interval permitted by the Regional Inspector C) 15 m only D) 20 m only

Correct answer: B) 10 m or such interval permitted by the Regional Inspector
Explanation: In such cases, contour intervals may be 10 metres or another interval specifically permitted in writing by the Regional Inspector.

Question 16 of 137

Spot levels on the floor of workings shall be shown along:

A) Conveyor belts only B) Haulage roadways and every roadway junction C) Air crossings only D) Inclines only

Correct answer: B) Haulage roadways and every roadway junction
Explanation: Spot levels help determine drainage and gradients and are required along haulage roadways and at every roadway junction.

Question 17 of 137

Where tramming is done manually, spot levels may be shown at intervals not exceeding:

A) 50 m B) 100 m C) 150 m D) 200 m

Correct answer: C) 150 m
Explanation: In manually trammed roadways, spot levels are permitted at intervals not exceeding 150 metres.

Question 18 of 137

After abandonment or closure of a mine, two true copies of the updated plans and sections shall be submitted to the Chief Inspector within:

A) 15 days B) 30 days C) 60 days D) 90 days

Correct answer: B) 30 days
Explanation: When a mine or seam is abandoned or closed, the owner must submit two true copies of the updated plans and sections within 30 days.

Question 19 of 137

If the working of a mine has been discontinued for more than 60 days, the updated plans and sections shall be submitted within:

A) 30 days B) 45 days C) 60 days D) 90 days

Correct answer: D) 90 days
Explanation: If mine workings remain discontinued for more than 60 days, the owner must submit the updated plans and sections to the Chief Inspector within 90 days

Question 20 of 137

Where a shaft is more than _____ deep, arrangements for descent and ascent shall be by mechanical means.

A) 20 m B) 25 m C) 30 m D) 50 m

Correct answer: C) 30 m
Explanation: If a shaft exceeds 30 metres in depth, mechanical means of transport must be installed and maintained so that they are constantly available for persons to ascend and descend safely.

Question 21 of 137

A suitable man-riding system approved by the Chief Inspector shall be provided where an incline is more than:

A) 500 m long B) 750 m long C) 1 km long (one way) D) 2 km long

Correct answer: C) 1 km long (one way)
Explanation: Where an incline exceeds 1 kilometre (one way) or travel is arduous, an approved man-riding system must be provided for safe transportation of persons.

Question 22 of 137

A man-riding system for an incline must be approved in writing by the:

A) Manager B) Regional Inspector C) Chief Inspector D) Surveyor

Correct answer: C) Chief Inspector
Explanation: The installation of a man-riding system requires written approval from the Chief Inspector.

Question 23 of 137

When ladders are used in a shaft, the maximum inclination from the horizontal shall be:

A) 60° B) 70° C) 80° D) 90°

Correct answer: C) 80°
Explanation: Shaft ladders must be securely fixed at an inclination not exceeding 80° from the horizontal to ensure safe climbing.

Question 24 of 137

Platforms shall be provided on shaft ladders at intervals not exceeding:

A) 5 m B) 7.5 m C) 9 m D) 12 m

Correct answer: C) 9 m
Explanation: Continuous ladders must have rest platforms every 9 metres or less to reduce fatigue and improve safety.

Question 25 of 137

Every shaft ladder shall project at least _____ above the mouth of the shaft and every platform.

A) 0.5 m B) 0.75 m C) 1 m D) 1.5 m

Correct answer: C) 1 m
Explanation: Ladders must extend at least one metre above the shaft mouth and platforms unless strong handrails or hold-fasts are provided.

Question 26 of 137

The minimum distance between two shafts, inclines, or outlets shall be:

A) 10 m B) 12 m C) 13.5 m D) 15 m

Correct answer: C) 13.5 m
Explanation: Separate means of access and egress must be at least 13.5 metres apart to ensure that one outlet remains available if the other becomes unusable.

Question 27 of 137

The minimum dimensions of the walkable passage connecting two shafts or outlets shall be:

A) 1.5 m high × 1.2 m wide B) 1.8 m high × 1.5 m wide C) 2.0 m high × 2.0 m wide D) 1.2 m high × 1.0 m wide

Correct answer: B) 1.8 m high × 1.5 m wide
Explanation: The connecting passage must be walkable, with a minimum height of 1.8 metres and width of 1.5 metres.

Question 28 of 137

During shaft sinking, the permanent lining shall normally be within _____ of the bottom of the shaft.

A) 3 m B) 6 m C) 10 m D) 20 m

Correct answer: B) 6 m
Explanation: Permanent lining made of metal, concrete, or masonry must not be more than 6 metres above the shaft bottom during sinking.

Question 29 of 137

If iron or steel rings with substantial lagging are used below the permanent lining, the distance from the shaft bottom may be increased up to:

A) 10 m B) 15 m C) 20 m D) 25 m

Correct answer: C) 20 m
Explanation: The regulations permit this distance to be increased to 20 metres when suitable iron or steel rings with substantial lagging are provided close to the shaft bottom.

Question 30 of 137

Every part of a mine shall, where practicable, be provided with at least _____ means of egress to the surface.

A) One B) Two C) Three D) Four

Correct answer: B) Two
Explanation: Every mine or part of a mine should have at least two independent means of escape to the surface for emergency evacuation.

Question 31 of 137

Every shaft, incline, and other outlet shall be examined at least once every:

A) Day B) Three days C) Seven days D) Fifteen days

Correct answer: C) Seven days
Explanation: An Overman or other competent person must inspect every shaft, incline, and outlet once every seven days.

Question 32 of 137

The examination report of shafts and outlets shall be recorded in:

A) Loose register B) Log sheet C) Bound paged book D) Daily attendance register

Correct answer: C) Bound paged book
Explanation: All examination reports must be entered in a bound paged book and signed and dated by the examining person.

Question 33 of 137

Mechanised outlets shall be examined every seven days by:

A) Any miner B) Surveyor only C) Engineer, Electrical Supervisor, Foreman, or other authorised competent person D) Safety committee only

Correct answer: C) Engineer, Electrical Supervisor, Foreman, or other authorised competent person
Explanation: Mechanised outlets require inspection by technically qualified personnel or another competent person authorised in writing by the Engineer.

Question 34 of 137

The report of examination of a mechanised outlet shall be:

A) Submitted monthly B) Displayed on the notice board only C) Immediately recorded in a bound paged book and signed and dated D) Sent only to the Chief Inspector

Correct answer: C) Immediately recorded in a bound paged book and signed and dated
Explanation: Every inspection report must be immediately recorded, and the examiner must sign and date the entry to maintain statutory records.

Question 35 of 137

Before bringing a new winding installation for lowering and raising persons into use, the owner shall give notice to the Chief Inspector and Regional Inspector at least:

A) 15 days B) 30 days C) 45 days D) 60 days

Correct answer: D) 60 days
Explanation: A notice with detailed specifications of the winding installation must be submitted at least 60 days before it is brought into use.

Question 36 of 137

The notice for a new winding installation shall contain:

A) Production capacity only B) Cost of installation only C) Detailed specifications of the installation D) Name of contractor only

Correct answer: C) Detailed specifications of the installation
Explanation: The prescribed notice must include complete technical specifications of the proposed winding installation.

Question 37 of 137

Unless otherwise permitted by the Chief Inspector, the diameter of winding drums or sheaves shall be at least _____ times the diameter of the rope.

A) 50 B) 75 C) 100 D) 120

Correct answer: C) 100
Explanation: To reduce rope fatigue and increase rope life, the drum or sheave diameter must be not less than 100 times the rope diameter, unless otherwise permitted.

Question 38 of 137

When the cage is at its lowest working point, there shall be at least _____ turns of rope remaining on the winding drum.

A) One B) Two C) Three D) Four

Correct answer: B) Two
Explanation: At least two full turns of rope must remain on the drum to prevent the rope from slipping or becoming detached.

Question 39 of 137

According to the statutory signal code, ONE RAP while the engine is in motion means:

A) Raise B) Lower C) Stop D) Men ready

Correct answer: C) Stop
Explanation: One rap given while the winding engine is moving is the emergency signal to STOP immediately.

Question 40 of 137

According to the statutory signal code, ONE RAP when the engine is at rest means:

A) Raise B) Lower C) Stop D) Men ready to descend

Correct answer: A) Raise
Explanation: When the engine is stationary, one rap instructs the winding engineman to raise the cage.

Question 41 of 137

According to the statutory signal code, TWO RAPS mean:

A) Raise B) Stop C) Lower D) Men ready

Correct answer: C) Lower
Explanation: Two raps are the standard signal for lowering the cage.

Question 42 of 137

According to the statutory signal code, THREE RAPS indicate:

A) Stop immediately B) Lower cage C) Men ready to ascend or descend D) Emergency only

Correct answer: C) Men ready to ascend or descend
Explanation: Three raps inform the engineman that persons are ready to travel.

Question 43 of 137

The maximum gap between the protective roofing and the top of the cage at the shaft bottom shall be:

A) 10 cm B) 15 cm C) 20 cm D) 25 cm

Correct answer: B) 15 cm
Explanation: The vertical and horizontal gap must not exceed 15 cm to prevent accidents due to falling objects.

Question 44 of 137

The winding installation record shall include all the following EXCEPT:

A) Manufacturer's name B) Year of manufacture C) Date of installation D) Daily coal production

Correct answer: D) Daily coal production
Explanation: The statutory record contains technical details of the winding equipment, not production figures.

Question 45 of 137

Except in friction winders, there shall be provided between the rope and the cage:

A) Safety chain B) Detaching hook C) Shock absorber only D) Spring balance

Correct answer: B) Detaching hook
Explanation: A detaching hook prevents the cage from being overwound into the headgear in the event of overwinding.

Question 46 of 137

The minimum distance between the detaching hook and the rope shackle for a geared engine shall be:

A) 1.2 m B) 1.5 m C) 1.8 m D) 3.6 m

Correct answer: C) 1.8 m
Explanation: For geared winding engines, the minimum clearance is 1.8 metres.

Question 47 of 137

The minimum distance between the detaching hook and the rope shackle for a direct acting engine shall be:

A) 1.8 m B) 2.4 m C) 3.0 m D) 3.6 m

Correct answer: D) 3.6 m
Explanation: Direct-acting engines require a larger clearance of 3.6 metres.

Question 48 of 137

The automatic contrivance shall prevent the descending cage from landing at a speed exceeding:

A) 1.0 m/s B) 1.2 m/s C) 1.5 m/s D) 2.0 m/s

Correct answer: C) 1.5 m/s
Explanation: The automatic contrivance must reduce the cage speed to not more than 1.5 m/s when approaching the pit bottom.

Question 49 of 137

The automatic contrivance and brakes shall be tested at least once every:

A) Day B) Week C) Month D) Six months

Correct answer: B) Week
Explanation: A weekly test is carried out by raising each cage beyond the last control point to ensure proper functioning.

Question 50 of 137

A complete overspeed test of the automatic contrivance shall be carried out at least once every:

A) Month B) Two months C) Three months D) Six months

Correct answer: C) Three months
Explanation: Every three months, the automatic contrivance is tested by attempting to land the descending cage at excessive speed under controlled conditions.

Question 51 of 137

When persons are in the cage, after reaching the overwind indicator point, the winding speed for the remaining distance shall not exceed:

A) 0.8 m/s B) 1.0 m/s C) 1.2 m/s D) 1.5 m/s

Correct answer: C) 1.2 m/s
Explanation: Beyond the marked overwind point, the engineman must not raise the cage faster than 1.2 metres per second while carrying persons.

Question 52 of 137

The overwind indicator point shall be fixed at a distance of at least _____ from the completion of the wind.

A) One drum circumference B) Twice the drum circumference C) Three drum circumferences D) Five drum circumferences

Correct answer: B) Twice the drum circumference
Explanation: The indicator warns the engineman before overwinding by marking a point at least twice the drum circumference from the completion of the wind.

Question 53 of 137

The gap between the floor of the cage and the lowest part of the gate or fence shall not exceed:

A) 10 cm B) 15 cm C) 20 cm D) 25 cm

Correct answer: B) 15 cm
Explanation: The maximum permitted gap is 15 cm to prevent persons from slipping underneath the gate.

Question 54 of 137

The maximum gap between any two members of the cage gate or fence shall be:

A) 10 cm B) 15 cm C) 20 cm D) 25 cm

Correct answer: D) 25 cm
Explanation: The spacing between gate members shall not exceed 25 cm, and gates must not open outwards or accidentally.

MCQs on Winding in Sinking Shafts, Winding Ropes & Suspension Gear (Regulations 84–85)

Question 55 of 137

In a shaft under sinking, a detaching hook shall be provided for each bucket when the shaft exceeds:

A) 30 m B) 45 m C) 100 m D) 150 m

Correct answer: B) 45 m
Explanation: In sinking shafts deeper than 45 metres, every bucket or other means of conveyance must be fitted with a detaching hook to prevent overwinding accidents.

Question 56 of 137

The minimum clear over-run space between the rope shackle and the detaching bell/plate shall be:

A) 1.8 m B) 2.4 m C) 3.0 m D) 3.6 m

Correct answer: D) 3.6 m
Explanation: A clear over-run space of at least 3.6 metres must be maintained to ensure the proper operation of the detaching hook.

Question 57 of 137

In a sinking shaft exceeding _____ in depth, guides shall be provided for each bucket or conveyance.

A) 45 m B) 100 m C) 150 m D) 200 m

Correct answer: C) 150 m
Explanation: When a shaft exceeds 150 metres, guides must be installed and maintained to stabilize the bucket during winding.

Question 58 of 137

During shaft sinking, the guides shall be kept extended to within _____ of the shaft bottom.

A) 10 m B) 15 m C) 22.5 m D) 30 m

Correct answer: C) 22.5 m
Explanation: The guides must remain extended to within 22.5 metres of the shaft bottom while sinking is in progress.

Question 59 of 137

Persons working at the bottom of a shaft exceeding 45 m shall be protected by a protective covering kept within:

A) 10 m of the bottom B) 15 m of the bottom C) 22.5 m of the bottom D) 30 m of the bottom

Correct answer: C) 22.5 m of the bottom
Explanation: An adequate protective covering with a bucket passage door must be maintained within 22.5 metres of the shaft bottom.

Question 60 of 137

Except in sinking shafts less than _____ deep, every winding rope shall be made of cold-drawn steel wire.

A) 15 m B) 20 m C) 30 m D) 45 m

Correct answer: C) 30 m
Explanation: All winding ropes in shafts deeper than 30 metres must be made of cold-drawn steel wire.

Question 61 of 137

The breaking load of a winding rope shall not be less than _____ times the maximum static load.

A) 5 B) 8 C) 10 D) 12

Correct answer: C) 10
Explanation: The rope must have a factor of safety of at least 10, meaning its breaking load must be at least 10 times the maximum static load.

Question 62 of 137

A winding rope shall normally not be used after:

A) 2 years B) 3 years C) 3½ years D) 5 years

Correct answer: C) 3½ years
Explanation: Winding ropes must be replaced after 3.5 years, unless special permission is granted by the Chief Inspector.

Question 63 of 137

Permission to use a winding rope beyond 3½ years shall be accompanied by:

A) Purchase bill only B) Rope manufacturer's certificate only C) Copy of entries in the rope record book D) Survey report only

Correct answer: C) Copy of entries in the rope record book
Explanation: The application must include the maintenance history of the rope recorded in the statutory register.

Question 64 of 137

Every rope capping shall withstand at least _____ times the maximum static load.

A) 5 times B) 8 times C) 10 times D) 15 times

Correct answer: C) 10 times
Explanation: Rope capping must be strong enough to withstand 10 times the maximum static load.

Question 65 of 137

For ropes up to 26 mm diameter, the tapered portion of the socket shall be at least:

A) 5.5 × rope diameter B) 6 × rope diameter C) 6.5 × rope diameter D) 7 × rope diameter

Correct answer: C) 6.5 × rope diameter
Explanation: The tapered socket length should be 6.5 times the rope diameter for ropes up to 26 mm.

Question 66 of 137

For ropes exceeding 26 mm diameter, the tapered portion of the socket shall be:

A) 6.5 times rope diameter B) 7 times rope diameter C) 7⅓ times rope diameter D) 8 times rope diameter

Correct answer: C) 7⅓ times rope diameter
Explanation: Larger ropes require a longer socket taper of 7⅓ times the rope diameter.

Question 67 of 137

The melting point of white metal used in rope capping shall not exceed:

A) 250°C B) 300°C C) 350°C D) 400°C

Correct answer: B) 300°C
Explanation: White metal used for capping must have a melting point not exceeding 300°C.

Question 68 of 137

The temperature of white metal while pouring into the socket shall not exceed:

A) 300°C B) 325°C C) 363°C D) 400°C

Correct answer: C) 363°C
Explanation: To avoid damaging the rope, the pouring temperature must not exceed 363°C.

Question 69 of 137

Before pouring white metal into the socket, it shall be heated to approximately:

A) 50°C B) 75°C C) 100°C D) 150°C

Correct answer: C) 100°C
Explanation: Heating the socket to about 100°C ensures proper bonding and prevents rapid cooling of the white metal.

Question 70 of 137

Except in friction winders, every winding rope shall be recapped at least once every:

A) 3 months B) 6 months C) 12 months D) 18 months

Correct answer: B) 6 months
Explanation: Rope capping must be renewed every six months or earlier if required, and after every overwind.

Question 71 of 137

Before every recapping, at least _____ of the rope including the capping shall be cut off and examined.

A) 1 m B) 1.5 m C) 2 m D) 3 m

Correct answer: C) 2 m
Explanation: A minimum of 2 metres of rope must be cut off and examined internally before recapping.

Question 72 of 137

Unless otherwise permitted, suspension gear in regular use shall be renewed after:

A) 3 years B) 5 years C) 6 years D) 10 years

Correct answer: C) 6 years
Explanation: All suspension gear must normally be replaced after 6 years of service.

Question 73 of 137

The minimum factor of safety for suspension gear components shall be:

A) 5 B) 8 C) 10 D) 15

Correct answer: C) 10
Explanation: Suspension gear components must have a minimum factor of safety of 10.

Question 74 of 137

Where threaded joints cannot be avoided, the minimum factor of safety shall be:

A) 10 B) 12 C) 15 D) 20

Correct answer: C) 15
Explanation: Because threaded joints are weaker than solid components, they require a higher factor of safety of 15.

Question 75 of 137

Cage chains and suspension gear shall be taken apart, cleaned and examined at least once every:

A) Month B) 3 months C) 6 months D) Year

Correct answer: C) 6 months
Explanation: Cage chains, detaching hooks, and other suspension gear must undergo detailed inspection every six months.

Question 76 of 137

Detaching hooks used in sinking shafts shall be examined at least:

A) Daily B) Weekly C) Monthly D) Every six months

Correct answer: B) Weekly
Explanation: Due to severe operating conditions, detaching hooks in sinking shafts require weekly inspection.

Question 77 of 137

During the weekly examination of a detaching hook in a sinking shaft, the _____ shall be replaced every time.

A) Rope socket B) Bell C) Shear pin D) Rope shackle

Correct answer: C) Shear pin
Explanation: The shear pin is replaced during every weekly examination to ensure the detaching hook functions correctly during overwinding.

MCQs on Suspension Gear & Examination of Winding Equipment (Regulations 86 & 88)

Question 78 of 137

All parts of the suspension gear shall be of a type approved by the:

A) Mine Manager B) Regional Inspector C) Chief Inspector D) Engineer

Correct answer: C) Chief Inspector
Explanation: Every component of the suspension gear must be of a type approved by the Chief Inspector to ensure compliance with statutory safety standards.

Question 79 of 137

Unless otherwise permitted by the Chief Inspector, suspension gear in regular use shall be renewed after a maximum service period of:

A) 3 years B) 5 years C) 6 years D) 10 years

Correct answer: C) 6 years
Explanation: Suspension gear must normally be renewed after six years of service, unless written permission is granted otherwise.

Question 80 of 137

The minimum factor of safety for suspension gear components shall be:

A) 5 B) 8 C) 10 D) 15

Correct answer: C) 10
Explanation: Every suspension gear component must have a minimum factor of safety of 10.

Question 81 of 137

Threaded joints in suspension gear shall:

A) Always be used B) Be avoided as far as practicable C) Be used only underground D) Require no special precautions

Correct answer: B) Be avoided as far as practicable
Explanation: Threaded joints are weaker than solid components and should be avoided wherever possible.

Question 82 of 137

Where a threaded joint cannot be avoided, the minimum factor of safety shall be:

A) 10 B) 12 C) 15 D) 20

Correct answer: C) 15
Explanation: Threaded joints require a higher factor of safety (15) because they are more susceptible to failure.

Question 83 of 137

Cage chains and other suspension gear shall be taken apart, cleaned, and examined at least once every:

A) Month B) 3 months C) 6 months D) Year

Correct answer: C) 6 months
Explanation: All suspension gear, including detaching hooks, must undergo detailed examination every six months.

Question 84 of 137

During the examination of suspension gear, inspectors shall check for:

A) Paint colour only B) Wear, rust, and cracks C) Manufacturer's logo only D) Cost of equipment

Correct answer: B) Wear, rust, and cracks
Explanation: Components are inspected for wear and tear, rust, cracks, and where necessary, gauged for dimensional accuracy.

Question 85 of 137

Detaching hooks used in sinking shafts shall be examined at least once every:

A) Day B) Week C) Month D) Six months

Correct answer: B) Week
Explanation: Because sinking operations are more hazardous, detaching hooks must be taken apart and examined every week.

Question 86 of 137

During every weekly examination of a detaching hook in a sinking shaft, the _____ shall be replaced.

A) Rope socket B) Cage chain C) Shear pin D) Rope shackle

Correct answer: C) Shear pin
Explanation: The shear pin is replaced during each weekly inspection to maintain the reliability of the detaching hook.

MCQs on Examination of Winding Equipment (Regulation 88)

Question 87 of 137

The attachment of the winding rope to the drum, suspension gear, cages, gates, and external winding apparatus shall be examined at least once every:

A) 12 hours B) 24 hours C) 7 days D) 30 days

Correct answer: B) 24 hours
Explanation: These safety-critical components must be inspected once every 24 hours before winding operations continue.

Question 88 of 137

The brakes of the winding engine shall be examined at least once every:

A) Shift B) 24 hours C) 7 days D) 30 days

Correct answer: B) 24 hours
Explanation: Winding engine brakes are daily safety items and must be checked every 24 hours.

Question 89 of 137

Each winding rope shall be examined once every seven days by passing it at a speed not exceeding:

A) 0.5 m/s B) 1.0 m/s C) 1.5 m/s D) 2.0 m/s

Correct answer: B) 1.0 m/s
Explanation: Weekly rope inspection is carried out by passing the rope at a speed not exceeding 1 metre per second.

Question 90 of 137

During the weekly examination, the following shall also be inspected:

A) Surface buildings only B) Guides and signaling arrangements C) Ventilation only D) Mine pumps only

Correct answer: B) Guides and signaling arrangements
Explanation: Weekly inspections include the external parts of the winding engine, shaft guides, and signaling system.

Question 91 of 137

Every winding rope shall undergo a detailed examination once every:

A) 7 days B) 15 days C) 30 days D) 12 months

Correct answer: C) 30 days
Explanation: A more detailed rope examination is required once every 30 days.

Question 92 of 137

During the monthly examination, the winding rope shall be passed at a speed not exceeding:

A) 0.25 m/s B) 0.5 m/s C) 1.0 m/s D) 1.5 m/s

Correct answer: B) 0.5 m/s
Explanation: The slower speed allows detailed inspection for wear, corrosion, broken wires, and reduction in rope circumference.

Question 93 of 137

During the monthly rope examination, the rope shall be cleaned at places not more than _____ apart.

A) 10 m B) 20 m C) 30 m D) 50 m

Correct answer: C) 30 m
Explanation: Cleaning every 30 metres ensures that the entire rope can be properly inspected.

Question 94 of 137

During the monthly rope examination, inspectors shall note:

A) Rope colour only B) Rope circumference reduction and wire condition C) Rope cost only D) Manufacturer only

Correct answer: B) Rope circumference reduction and wire condition
Explanation: Inspection includes checking for wear, corrosion, brittleness, fractures, and reduction in rope circumference.

Question 95 of 137

The internal parts of the winding engine shall be examined at least once every:

A) Month B) 3 months C) 6 months D) 12 months

Correct answer: D) 12 months
Explanation: A complete internal inspection of the winding engine is required annually.

MCQs on Shaft Bypass

Question 96 of 137

Where persons need to cross from one side of the shaft to the other, an adequate _____ shall be provided.

A) Bridge B) Cage C) Bypass D) Ladder

Correct answer: C) Bypass
Explanation: A bypass allows persons to move safely without entering or crossing the shaft opening.

Question 97 of 137

The minimum dimensions of a shaft bypass shall be:

A) 1.5 m high × 1.0 m wide B) 1.8 m high × 1.2 m wide C) 2.0 m high × 1.5 m wide D) 2.1 m high × 1.8 m wide

Correct answer: B) 1.8 m high × 1.2 m wide
Explanation: The bypass must have a minimum height of 1.8 metres and width of 1.2 metres, and it must always be kept free from obstructions.

MCQs on Haulage Roadways & Travelling Roadways (Regulation 92)

Question 98 of 137

A runaway switch shall be provided below the first stop-block at a distance:

A) Equal to the train length only B) Greater than the train length, but not exceeding it by more than 10 m C) 20 m beyond the train length D) Any convenient distance

Correct answer: B) Greater than the train length, but not exceeding it by more than 10 m
Explanation: The runaway switch must be installed beyond the length of the train of tubs so that a runaway train can be safely diverted, but the excess distance must not exceed 10 metres.

Question 99 of 137

Behind every ascending tub or train of tubs, there shall be provided:

A) Buffer stop B) Back-stay, drag, or other suitable contrivance C) Brake shoe only D) Safety chain only

Correct answer: B) Back-stay, drag, or other suitable contrivance
Explanation: A back-stay or drag prevents the tubs from rolling backward if the haulage rope fails.

Question 100 of 137

To prevent tubs from running away in the forward direction, the haulage roadway shall be provided with:

A) Safety hooks or jazz rails B) Wooden sleepers only C) Hand rails only D) Guard stones only

Correct answer: A) Safety hooks or jazz rails
Explanation: Safety hooks, jazz rails, or similar devices prevent uncontrolled forward movement of tubs.

Question 101 of 137

Tub re-railers shall be provided at intervals not exceeding:

A) 100 m B) 150 m C) 250 m D) 500 m

Correct answer: C) 250 m
Explanation: Tub re-railers are installed every 250 metres to quickly place derailed tubs back on the rails.

Question 102 of 137

Effective signaling arrangements shall be provided on every haulage roadway exceeding:

A) 20 m B) 25 m C) 30 m D) 50 m

Correct answer: C) 30 m
Explanation: On haulage roadways longer than 30 metres, signaling must be provided between every stopping place and the haulage operator.

Question 103 of 137

According to the haulage signal code, ONE RAP while the haulage is in motion means:

A) Raise B) Lower C) Stop D) Start

Correct answer: C) Stop
Explanation: One rap given during motion is the signal to STOP immediately.

Question 104 of 137

According to the haulage signal code, TWO RAPS mean:

A) Stop B) Lower or haul in slowly C) Start D) Raise quickly

Correct answer: B) Lower or haul in slowly
Explanation: Two raps instruct the operator to lower or haul in slowly.

Question 105 of 137

According to the haulage signal code, THREE RAPS mean:

A) Stop B) Raise C) Start when at rest D) Emergency

Correct answer: C) Start when at rest
Explanation: When the haulage engine is stationary, three raps indicate START.

Question 106 of 137

According to the haulage signal code, FOUR RAPS mean:

A) Stop B) Lower C) Raise or haul out slowly D) Men ready

Correct answer: C) Raise or haul out slowly
Explanation: Four raps signal the operator to raise or haul out slowly.

Question 107 of 137

Efficient telephonic communication shall be provided where the haulage roadway extends more than:

A) 100 m B) 200 m C) 300 m D) 500 m

Correct answer: C) 300 m
Explanation: Where haulage roadways or conveyors extend more than 300 metres from the shaft or mine entrance, telephonic communication must be provided.

Question 108 of 137

In second and third degree gassy seams, signaling and telephone circuits shall be:

A) Flameproof only B) Intrinsically safe C) Battery operated only D) Underground only

Correct answer: B) Intrinsically safe
Explanation: Electrical signaling and communication circuits in Degree II and III gassy seams must be intrinsically safe to prevent ignition of methane.

Question 109 of 137

Where persons are allowed to pass while haulage is in motion, manholes shall normally be provided at intervals not exceeding:

A) 5 m B) 10 m C) 15 m D) 20 m

Correct answer: B) 10 m
Explanation: Refuge manholes must normally be provided every 10 metres.

Question 110 of 137

Where the haulage gradient is less than 1 in 6, manholes may be provided at intervals not exceeding:

A) 10 m B) 15 m C) 20 m D) 25 m

Correct answer: C) 20 m
Explanation: On flatter gradients (less than 1 in 6), the spacing between manholes may be increased to 20 metres.

Question 111 of 137

The minimum dimensions of a manhole shall be:

A) 1.5 m × 1.0 m × 0.5 m B) 1.8 m high × 1.2 m deep × 0.75–1.0 m wide C) 2.0 m high × 1.5 m deep × 1.2 m wide D) 1.2 m high × 1.0 m deep × 0.6 m wide

Correct answer: B) 1.8 m high × 1.2 m deep × 0.75–1.0 m wide
Explanation: A refuge manhole must provide adequate space for workers to stand safely clear of moving tubs.

Question 112 of 137

Every manhole shall be whitewashed inside and around the opening for a distance of at least:

A) 0.2 m B) 0.3 m C) 0.5 m D) 1.0 m

Correct answer: B) 0.3 m
Explanation: Whitewashing improves visibility, helping workers locate manholes quickly during emergencies.

Question 113 of 137

At places where tubs are coupled or uncoupled, the clear space between the tubs and one side of the roadway shall not be less than:

A) 0.5 m B) 0.75 m C) 1.0 m D) 1.5 m

Correct answer: C) 1.0 m
Explanation: A minimum clearance of 1 metre provides safe working space during coupling and uncoupling operations.

MCQs on Travelling Roadways

Question 114 of 137

Every travelling roadway shall have a minimum height of:

A) 1.5 m B) 1.8 m C) 2.0 m D) 2.2 m

Correct answer: B) 1.8 m
Explanation: Travelling roadways must have a minimum height of 1.8 metres throughout their length for safe movement of persons.

Question 115 of 137

When the inclination of a travelling roadway exceeds _____, suitable steps or ladders shall be provided.

A) 20° B) 30° C) 45° D) 60°

Correct answer: B) 30°
Explanation: Roadways steeper than 30° require steps or ladders to ensure safe travel.

Question 116 of 137

When the inclination exceeds _____, handrails or ropes shall be provided in addition to steps or ladders.

A) 30° B) 40° C) 45° D) 60°

Correct answer: C) 45°
Explanation: For inclinations above 45°, handrails or ropes are required to assist safe climbing.

Question 117 of 137

When the inclination exceeds _____, suitable platforms shall be provided at intervals not exceeding 10 m.

A) 30° B) 45° C) 60° D) 75°

Correct answer: C) 60°
Explanation: Where the roadway inclination is greater than 60°, rest platforms must be provided every 10 metres along the slope.

MCQs on Tubs, Haulage Ropes, Conveyors & Haulage Examination (Regulations 94–99)

Question 118 of 137

The minimum gap between the innermost ends of two tubs in tandem shall be:

A) 10 cm B) 15 cm C) 20 cm D) 30 cm

Correct answer: C) 20 cm
Explanation: Every tub must have a strong buffer at each coupling end so that when two tubs are coupled together, the minimum gap between them is 20 cm, preventing impact damage.

Question 119 of 137

Two tubs are considered to be in close succession when the distance between them is less than:

A) 5 m B) 10 m C) 15 m D) 20 m

Correct answer: B) 10 m
Explanation: If the distance between two hand-moved tubs is less than 10 metres, they are regarded as being in close succession and must be coupled together.

Question 120 of 137

Two or more tubs moved by hand in close succession shall:

A) Be moved separately B) Be coupled together before movement C) Be pushed by different persons D) Be moved only downhill

Correct answer: B) Be coupled together before movement
Explanation: Coupling the tubs together reduces the risk of collision and improves control during movement.

Question 121 of 137

No person shall take a tub down a gradient exceeding:

A) 1 in 10 B) 1 in 15 C) 1 in 20 D) 1 in 25

Correct answer: C) 1 in 20
Explanation: On gradients steeper than 1 in 20, moving tubs manually becomes unsafe and is prohibited.

MCQs on Haulage Ropes (Regulation 96)

Question 122 of 137

A haulage rope shall not be used if its factor of safety is less than:

A) 6 B) 7 C) 8 D) 10

Correct answer: C) 8
Explanation: Every haulage rope must have a minimum factor of safety of 8 to ensure safe operation.

Question 123 of 137

Every capped haulage rope shall be recapped at least once every:

A) 3 months B) 6 months C) 9 months D) 12 months

Correct answer: B) 6 months
Explanation: Capped haulage ropes must be recapped every six months or earlier if required, under the supervision of a competent person.

Question 124 of 137

A rope which has been spliced shall:

A) Be used only for man winding B) Be used only in direct haulage C) Not be used in direct haulage D) Be used only on conveyors

Correct answer: C) Not be used in direct haulage
Explanation: Spliced ropes are not permitted in direct haulage because the splice weakens the rope.

MCQs on Roadway Conveyors

Question 125 of 137

The travelling space between a roadway conveyor and one side of the roadway shall be at least:

A) 0.5 m B) 0.75 m C) 1.0 m D) 1.5 m

Correct answer: C) 1.0 m
Explanation: A clear travelling space of not less than 1 metre must be maintained beside the conveyor for safe passage.

Question 126 of 137

Effective signaling arrangements shall be provided where a conveyor transports loads over a distance exceeding:

A) 20 m B) 30 m C) 50 m D) 100 m

Correct answer: B) 30 m
Explanation: Conveyors longer than 30 metres must have effective signaling from every point to the conveyor operator.

Question 127 of 137

Every roadway belt conveyor shall be provided with:

A) Manual bell only B) Audio warning only C) Audio-visual pre-start warning alarm D) Siren only at the loading point

Correct answer: C) Audio-visual pre-start warning alarm
Explanation: The audio-visual alarm warns all persons before the conveyor starts, reducing accident risk.

Question 128 of 137

The code of practice for underground belt conveyor installation shall be submitted to the Regional Inspector at least:

A) 15 days before installation B) 30 days before installation C) 60 days before installation D) 90 days before installation

Correct answer: B) 30 days before installation
Explanation: The manager must submit the conveyor safety code to the Regional Inspector at least 30 days before installation begins.

Question 129 of 137

If a belt conveyor is intended for man-riding, the separate code of practice shall be submitted to the Chief Inspector at least:

A) 30 days B) 45 days C) 60 days D) 90 days

Correct answer: D) 90 days
Explanation: A separate safety code for man-riding conveyors must be submitted 90 days in advance to obtain permission.

Question 130 of 137

Responsibility for implementing the conveyor code of practice rests with:

A) Surveyor only B) Manager only C) Engineer only D) Manager and Engineer

Correct answer: D) Manager and Engineer
Explanation: Both the Manager and the Engineer are jointly responsible for implementing the approved code of practice.

MCQs on Examination of Haulage Engines (Regulation 98)

Question 131 of 137

Every haulage engine, brake wheel, rope, and other appliances shall be examined at least once every:

A) Shift B) 24 hours C) 7 days D) 30 days

Correct answer: B) 24 hours
Explanation: Daily inspection ensures that all haulage equipment is safe before operation.

Question 132 of 137

Tracks used for mechanical or gravity haulage and safety contrivances shall be examined at least once every:

A) Day B) 3 days C) 7 days D) Month

Correct answer: C) 7 days
Explanation: Weekly inspections help detect defects in tracks and safety devices before they become hazardous.

MCQs on Examination of Roadways (Regulation 99)

Question 133 of 137

Haulage and travelling roadways shall be examined at least once every:

A) Day B) 3 days C) 7 days D) Month

Correct answer: C) 7 days
Explanation: An Overman or other competent person must inspect all haulage and travelling roadways weekly.

Question 134 of 137

A locomotive shall not be used where the track gradient exceeds:

A) 1 in 10 B) 1 in 12 C) 1 in 15 D) 1 in 20

Correct answer: C) 1 in 15
Explanation: Locomotives are prohibited on gradients steeper than 1 in 15 due to braking and traction limitations.

Question 135 of 137

Where railway wagons are specially placed to provide a thoroughfare, the minimum width of the thoroughfare shall be:

A) 2 m B) 3 m C) 4 m D) 5 m

Correct answer: D) 5 m
Explanation: A 5-metre-wide thoroughfare ensures safe movement of persons and equipment.

Question 136 of 137

No material shall be dumped within _____ of either side of a rail track.

A) 0.5 m B) 0.75 m C) 1.0 m D) 1.2 m

Correct answer: D) 1.2 m
Explanation: Maintaining a 1.2-metre clearance prevents obstruction and derailment hazards.

Question 137 of 137

Where occupied buildings are situated within _____ of a haul road, tramline, or rail line, a substantial fence shall be provided.

A) 10 m B) 12 m C) 15 m D) 20 m

Correct answer: C) 15 m
Explanation: A protective fence is mandatory where occupied buildings are within 15 metres of haulage roads or rail lines to protect occupants from moving vehicles.

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