CSCS Tunnelling Mock Test

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Specialists Test

Tunnelling

1 / 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?

15 m

10 m

20 m

5 m

2 / 44

Why is it important to clean grouting pipelines after use?

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 helps prevent blockages, which could cause the hose to burst

It prevents the atmosphere from becoming explosive

3 / 44

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

30 minutes

45 minutes

15 minutes

60 minutes

4 / 44

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

The rescue services

Environmental Health

The Health and Safety Executive (HSE)

The crane operator

5 / 44

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

Visitor Book

Signing-in-book

Clocking-on machine

Tally system

6 / 44

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

Blowout at injection point

Hand-arm vibration

Shrinking grout hose

Falls from height

7 / 44

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

Paint

Grease

Mud

Air

8 / 44

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

Falling mined material

Vibrating hand tools

Noise

Sprayed concrete rebound

9 / 44

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

Crush

Asphyxiation

Crash

Noise

10 / 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

Locate the blockage

Clean out section by section

11 / 44

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

5 m

10 m

20 m

15 m

12 / 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 allow personnel to talk while being transported

To prevent derailment of the personnel carrying car

To minimise injury in the event of a derailment

To prevent personnel leaning out or falling out

13 / 44

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

Signal or traffic lights

CCTV in the cab

Klaxon bell

Telephone

Siren

14 / 44

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

Provide air monitoring

Avoid exposure

Have a portable breathing set nearby

Provide ventilation systems

15 / 44

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

It must be within one minute's walking distance

It must be within three minutes' walking distance

It must be immediately available

It must be within two minutes' walking distance

16 / 44

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

Hazard lighting

Seat belt

Emergency lighting

Emergency pull cord or stop button

17 / 44

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

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

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

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

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

18 / 44

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

A smell of rotten eggs

It causes a yellow haze

It is odourless

It causes skin irritation

19 / 44

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

Text message

Telephone

Tannoy system

Two-way radio

20 / 44

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

Three

One

Four

Two

21 / 44

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

Water leak

Oil spillage

Overloading

Power loss

Overheating

22 / 44

How could hydrogen sulphide affect those working in a tunnel?

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 a mist making it difficult to see

It can cause respiratory paralysis, stopping you from breathing

23 / 44

What is the colour of a 400-volt plug?

Red

Blue

Yellow

Black

24 / 44

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

Electro-hydraulic spray pumps

Rail-mounted plant

Tunnel-boring machines (TBMs)

Diesel-powered equipment

25 / 44

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

0.9 m

1.8 m

1.5 m

1.2 m

26 / 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 many as is stated by the supervisor

As defined by the Health and Safety Executive (HSE)

27 / 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

Your supervisor would inform you

You would be informed as part of your induction

28 / 44

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

For services such as cables

For storage of materials and equipment

When vehicles are passing

When installing ventilation cassettes

29 / 44

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

It can be prevented if gloves are worn

It causes irreversible damage

It can be partially cured with medication

It can be corrected by surgery

30 / 44

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

A supply of running water

An eyewash station

A first aider

Sterile bandages

31 / 44

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

21%

19%

20%

18%

32 / 44

How should communication equipment be powered?

Linked to the main tunnel power supply

Battery-powered

Independent of the main tunnel power supply

Linked to the 33 kVA power supply

33 / 44

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

Decompression, combustion incident

Decompression illness

Dizzy, confused, induced state

Decompression incident

34 / 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

35 / 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)

Disposable overalls

Safety harness

Eye protection

36 / 44

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

It is explosive

It causes skin irritation

It can cause temporary blindness

It is toxic

It reduces oxygen in the atmosphere

37 / 44

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

Arc eye

Cement burns

Hand-arm vibration syndrome

Inhalation of dust

38 / 44

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

80 m on straights; 20 m on curves

50 m on straights; 25 m on curves

70 m on straights; 25 m on curves

60 m on straights; 30 m on curves

39 / 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

40 / 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?

Only when everyone else starts to move

When you have identified the direction of travel

Immediately

Only when you can see it

41 / 44

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

Working as the signaller at the pit top

Landing concrete jacking-pipes in the pit bottom

Building rings from a platform within a shaft

Working as the belt-person on a TBM

42 / 44

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

50 m

75 m

100 m

25 m

43 / 44

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

Try to repair it

Report it to your supervisor

Evacuate the tunnel

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

44 / 44

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

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

With a calibrated gas detector

They both have a distinctive bad egg smell

With a dosimeter

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The average score is 87%

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