CSCS Tunnelling Mock Test

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Specialists Test

Tunnelling

1 / 44

What term is used for the access and egress control system to tunnels?

Clocking-on machine

Visitor Book

Tally system

Signing-in-book

2 / 44

While walking through the tunnel you see a tear in the ventilation ducting. What should you do?

Check if it has got any bigger at the end of the shift

Try to repair it

Report it to your supervisor

Evacuate the tunnel

3 / 44

Which of the following is not a hazard associated with hand mining?

Sprayed concrete rebound

Falling mined material

Vibrating hand tools

Noise

4 / 44

Inclined conveyors are fitted with anti-rollback devices to prevent the belt running backwards due to which two potential failures?

Power loss

Overloading

Water leak

Oil spillage

Overheating

5 / 44

When working underground how quickly should you be able to get to your self-rescue set?

It must be within two minutes' walking distance

It must be within three minutes' walking distance

It must be within one minute's walking distance

It must be immediately available

6 / 44

What is the colour of a 400-volt plug?

Blue

Red

Yellow

Black

7 / 44

The tunnel-boring machine operator has restricted vision during the building process. Which of the following is the most effective way of overcoming this?

Use a signaller

Get one of the gang to build

Mirrors at shoulder or crane level

Alternative control point

8 / 44

Which of the following statements is correct regarding hand-arm vibration syndrome (HAVS)?

It can be prevented if gloves are worn

It can be partially cured with medication

It causes irreversible damage

It can be corrected by surgery

9 / 44

When should a hop-up or refuge in the tunnel be used?

For services such as cables

When vehicles are passing

When installing ventilation cassettes

For storage of materials and equipment

10 / 44

Methane gas does not have an odour. In what two ways can it be dangerous?

It causes skin irritation

It can cause temporary blindness

It reduces oxygen in the atmosphere

It is explosive

It is toxic

11 / 44

What does the term DCI refer to in compressed air tunnelling?

Decompression illness

Decompression incident

Dizzy, confused, induced state

Decompression, combustion incident

12 / 44

Oxygen cylinders should not be allowed to come into contact with which of the following substances?

Paint

Grease

Mud

Air

13 / 44

When charging lead-acid batteries, they produce an explosive gas. Smoking and other naked flames are not permitted within what distance of a battery-charging area?

20 m

10 m

15 m

5 m

14 / 44

Why is it important to clean grouting pipelines after use?

It prevents the atmosphere from becoming explosive

It keeps the dust level below the point at which respiratory protective equipment (RPE) is needed

It helps prevent blockages, which could cause the hose to burst

It helps prevent the pipes from becoming weakened

15 / 44

If a personnel carrying cage is used to transport workers into and out of a shaft, how many people can be transported at any one time?

As many as can fit into it

As many as is stated on the personnel carrier

As defined by the Health and Safety Executive (HSE)

As many as is stated by the supervisor

16 / 44

Which one of the following is the least effective method of controlling locomotive movements in the pit bottom?

Hand signals

Shouting

Radio

Traffic lights

17 / 44

How would you know if the ventilation system stops working?

You would be informed as part of your induction

An audible alarm would sound

You would be told at the daily start of shift briefing

Your supervisor would inform you

18 / 44

Which of the following situations would require using a safety harness?

Working as the belt-person on a TBM

Working as the signaller at the pit top

Building rings from a platform within a shaft

Landing concrete jacking-pipes in the pit bottom

19 / 44

For tunnelling operations what is the minimum number of escape routes or methods that must be maintained from a working shaft?

Four

One

Three

Two

20 / 44

Which two methods are commonly used for communication between the tunnelling face and the surface?

Text message

Tannoy system

Telephone

Email

Two-way radio

A Tannoy system in the context of tunneling refers to a specialized public address (PA) system designed for use in underground environments such as tunnels, mines, and subways. These environments present unique challenges that require robust and reliable communication systems to ensure safety and operational efficiency. Following are the advantages of this system.

Enhanced Safety: Improve the ability to communicate emergency information quickly and effectively, reducing response times and enhancing worker safety.

Operational Efficiency: Streamline communication, reducing misunderstandings and delays, and improving overall productivity.

Durability: Systems are built to withstand the harsh conditions typical of tunneling environments, including extreme temperatures, humidity, dust, and vibrations.

Clarity and Reach: Designed to ensure messages are clear and audible even over long distances and amidst background noise.

21 / 44

Hot work activities are not permitted within what distance of a diesel-fuelling point?

5 m

20 m

10 m

15 m

22 / 44

Which one of the following is not a health risk associated with sprayed concrete linings?

Hand-arm vibration syndrome

Inhalation of dust

Arc eye

Cement burns

Arc eye is not a health risk associated with sprayed concrete linings.

Sprayed concrete linings (also known as shotcrete) involve specific health risks such as:

Cement burns: Skin contact with wet concrete can cause severe burns due to the high alkalinity of cement.

Hand-arm vibration syndrome (HAVS): Workers using vibrating tools during the spraying process are at risk of developing HAVS.

Inhalation of dust: The process generates dust that can be harmful if inhaled, leading to respiratory issues.

Arc eye, on the other hand, is a condition typically associated with exposure to intense ultraviolet (UV) radiation, commonly from welding arcs, and not from the process of spraying concrete linings.

23 / 44

How could hydrogen sulphide affect those working in a tunnel?

It can cause a mist making it difficult to see

It can leave a yellow dust which can irritate the skin

It can make it noisier and therefore harder for you to hear

It can cause respiratory paralysis, stopping you from breathing

24 / 44

What must be available at batching plants to deal with cement or concrete splashes?

An eyewash station

A first aider

A supply of running water

Sterile bandages

25 / 44

A grout gun inserted into a segment grout hole may present which of the following hazards?

Blowout at injection point

Falls from height

Shrinking grout hose

Hand-arm vibration

26 / 44

Which of the following is a common traffic light system used underground to control plant movement?

Red = in bye, Amber = stop, Green = out bye

Red = out bye, Amber = in bye, Green = stop

Red = stop, Amber = out bye, Green = in bye

Red = stop, Amber = in bye, Green = out bye

27 / 44

Which of the following personal protective equipment (PPE) is not normally required for robotic-sprayed concrete lining operations in tunnelling?

Eye protection

Respiratory protective equipment (RPE)

Disposable overalls

Safety harness

28 / 44

What is the first action to be taken if there is a blockage in the grouting pipe?

Split the line

Locate the blockage

Clean out section by section

Release the pressure in the pipeline

29 / 44

How should communication equipment be powered?

Linked to the main tunnel power supply

Independent of the main tunnel power supply

Linked to the 33 kVA power supply

Battery-powered

30 / 44

What is the minimum recommended height of a secure barrier used to prevent falls around an open shaft?

1.2 m

0.9 m

1.8 m

1.5 m

31 / 44

If oxygen levels are dropping, at what point would the atmosphere be classed as oxygen deficient?

20%

18%

21%

19%

32 / 44

Which of the following must be fitted as a conveyor system safety device?

Seat belt

Emergency pull cord or stop button

Emergency lighting

Hazard lighting

33 / 44

Nitrogen oxide (NO₂₎gas can be present in tunnels. Which of these plant items causes the most nitrogen oxide to be generated?

Tunnel-boring machines (TBMs)

Electro-hydraulic spray pumps

Rail-mounted plant

Diesel-powered equipment

34 / 44

Which of the following is a reliable way to detect carbon monoxide and methane gas?

They both have a distinctive bad egg smell

With a calibrated gas detector

With a dosimeter

With your eyes, as you can see the gases in the mist

35 / 44

If a locomotive or vehicle is approaching you in the tunnel, when should you make your way to a hop-up or safe refuge?

Immediately

When you have identified the direction of travel

Only when everyone else starts to move

Only when you can see it

36 / 44

As a minimum, how long must a fire watch be maintained after hot works have been completed?

45 minutes

15 minutes

30 minutes

60 minutes

37 / 44

What is the likely hazard from moving plant or locomotives in a tunnel?

Crash

Crush

Noise

Asphyxiation

38 / 44

Which of the following characteristics is associated with hydrogen sulphide gas?

It causes a yellow haze

It is odourless

A smell of rotten eggs

It causes skin irritation

39 / 44

A locomotive is entering the rear of the tunnel-boring machine. Which two electronic systems are recommended to assist in controlling its movements?

Telephone

Signal or traffic lights

Klaxon bell

Siren

CCTV in the cab

40 / 44

In the event of an emergency who will use the information displayed on a tally board?

Environmental Health

The Health and Safety Executive (HSE)

The rescue services

The crane operator

41 / 44

What is the maximum recommended distance between emergency lighting in a tunnel?

75 m

100 m

50 m

25 m

42 / 44

Crash cages and side bars or sliding doors should be fitted to all personnel carrying cars used in the tunnel. Select two reasons why they are needed.

To prevent derailment of the personnel carrying car

To minimise injury in the event of a derailment

To stop personnel sitting close together

To prevent personnel leaning out or falling out

To allow personnel to talk while being transported

43 / 44

Exposure to nitrogen oxide (NO₂) gas can cause breathing problems. Which of the following should be the first control measure?

Have a portable breathing set nearby

Provide air monitoring

Avoid exposure

Provide ventilation systems

44 / 44

How often should safe refuge (hop-ups) be located along a tunnel?

80 m on straights; 20 m on curves

60 m on straights; 30 m on curves

50 m on straights; 25 m on curves

70 m on straights; 25 m on curves

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The average score is 75%

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2 Comments

E. SHATNHI
May 15, 2026 at 3:00 PM
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E. SHATNHI
May 15, 2026 at 2:59 PM
I WOULD LIKE TO PARTICIPATE IN THIS QUIZ
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