CSCS Tunnelling Mock Test

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Specialists Test

Tunnelling

1 / 44

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

1.5 m

0.9 m

1.8 m

1.2 m

2 / 44

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

Emergency lighting

Seat belt

Hazard lighting

Emergency pull cord or stop button

3 / 44

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

It can be corrected by surgery

It can be prevented if gloves are worn

It causes irreversible damage

It can be partially cured with medication

4 / 44

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

Signing-in-book

Tally system

Clocking-on machine

Visitor Book

5 / 44

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

Release the pressure in the pipeline

Split the line

Clean out section by section

Locate the blockage

6 / 44

What is the colour of a 400-volt plug?

Blue

Yellow

Red

Black

7 / 44

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

For services such as cables

When installing ventilation cassettes

When vehicles are passing

For storage of materials and equipment

8 / 44

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

Arc eye

Cement burns

Inhalation of dust

Hand-arm vibration syndrome

9 / 44

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

Power loss

Oil spillage

Overloading

Overheating

Water leak

10 / 44

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

It is odourless

It causes a yellow haze

It causes skin irritation

A smell of rotten eggs

11 / 44

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

15 minutes

45 minutes

30 minutes

60 minutes

12 / 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

Provide ventilation systems

Avoid exposure

13 / 44

Why is it important to clean grouting pipelines after use?

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

It helps prevent the pipes from becoming weakened

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

It prevents the atmosphere from becoming explosive

14 / 44

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

Vibrating hand tools

Sprayed concrete rebound

Falling mined material

Noise

15 / 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 dosimeter

With a calibrated gas detector

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

16 / 44

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

5 m

10 m

20 m

15 m

17 / 44

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

Text message

Tannoy system

Telephone

Two-way radio

18 / 44

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

Rail-mounted plant

Electro-hydraulic spray pumps

Tunnel-boring machines (TBMs)

Diesel-powered equipment

19 / 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

Alternative control point

Mirrors at shoulder or crane level

Get one of the gang to build

20 / 44

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

Shrinking grout hose

Blowout at injection point

Falls from height

Hand-arm vibration

21 / 44

How would you know if the ventilation system stops working?

An audible alarm would sound

You would be told at the daily start of shift briefing

You would be informed as part of your induction

Your supervisor would inform you

22 / 44

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

Environmental Health

The rescue services

The Health and Safety Executive (HSE)

The crane operator

23 / 44

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

Working as the belt-person on a TBM

Building rings from a platform within a shaft

Landing concrete jacking-pipes in the pit bottom

Working as the signaller at the pit top

24 / 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 defined by the Health and Safety Executive (HSE)

As many as is stated by the supervisor

As many as can fit into it

As many as is stated on the personnel carrier

25 / 44

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

Respiratory protective equipment (RPE)

Safety harness

Disposable overalls

Eye protection

26 / 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

27 / 44

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

50 m on straights; 25 m on curves

80 m on straights; 20 m on curves

70 m on straights; 25 m on curves

60 m on straights; 30 m on curves

28 / 44

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

25 m

75 m

50 m

100 m

29 / 44

How could hydrogen sulphide affect those working in a tunnel?

It can cause a mist making it difficult to see

It can cause respiratory paralysis, stopping you from breathing

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

It can leave a yellow dust which can irritate the skin

30 / 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 stop personnel sitting close together

To prevent derailment of the personnel carrying car

To prevent personnel leaning out or falling out

To minimise injury in the event of a derailment

To allow personnel to talk while being transported

31 / 44

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

Two

Three

One

Four

32 / 44

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

Mud

Paint

Air

Grease

33 / 44

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

Klaxon bell

Telephone

Signal or traffic lights

CCTV in the cab

Siren

34 / 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?

10 m

5 m

15 m

20 m

35 / 44

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

It is toxic

It causes skin irritation

It is explosive

It can cause temporary blindness

It reduces oxygen in the atmosphere

36 / 44

How should communication equipment be powered?

Battery-powered

Linked to the 33 kVA power supply

Independent of the main tunnel power supply

Linked to the main tunnel power supply

37 / 44

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

A first aider

Sterile bandages

A supply of running water

An eyewash station

38 / 44

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

19%

20%

21%

18%

39 / 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 = stop, Amber = out bye, Green = in bye

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

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

40 / 44

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

Traffic lights

Shouting

Hand signals

Radio

41 / 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?

When you have identified the direction of travel

Only when everyone else starts to move

Immediately

Only when you can see it

42 / 44

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

Noise

Asphyxiation

Crush

Crash

43 / 44

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

Decompression, combustion incident

Decompression illness

Decompression incident

Dizzy, confused, induced state

44 / 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 one minute's walking distance

It must be within three minutes' walking distance

It must be immediately available

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