CSCS Tunnelling Mock Test

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Specialists Test

Tunnelling

1 / 44

How should communication equipment be powered?

Linked to the 33 kVA power supply

Battery-powered

Independent of the main tunnel power supply

Linked to the main tunnel power supply

2 / 44

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

Power loss

Overloading

Overheating

Oil spillage

Water leak

3 / 44

What is the colour of a 400-volt plug?

Blue

Red

Black

Yellow

4 / 44

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

It causes skin irritation

It is explosive

It reduces oxygen in the atmosphere

It can cause temporary blindness

It is toxic

5 / 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?

Alternative control point

Use a signaller

Get one of the gang to build

Mirrors at shoulder or crane level

6 / 44

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

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

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

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

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

7 / 44

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

With a dosimeter

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

They both have a distinctive bad egg smell

With a calibrated gas detector

8 / 44

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

30 minutes

15 minutes

60 minutes

45 minutes

9 / 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)

Rail-mounted plant

Diesel-powered equipment

Electro-hydraulic spray pumps

10 / 44

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

Cement burns

Inhalation of dust

Arc eye

Hand-arm vibration syndrome

11 / 44

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

19%

20%

21%

18%

12 / 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

Report it to your supervisor

Evacuate the tunnel

Try to repair it

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?

Siren

Signal or traffic lights

Klaxon bell

Telephone

CCTV in the cab

14 / 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 immediately available

It must be within two minutes' walking distance

It must be within three minutes' walking distance

15 / 44

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

60 m on straights; 30 m on curves

80 m on straights; 20 m on curves

70 m on straights; 25 m on curves

50 m on straights; 25 m on curves

16 / 44

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

75 m

50 m

100 m

25 m

17 / 44

Why is it important to clean grouting pipelines after use?

It prevents the atmosphere from becoming explosive

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

18 / 44

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

An eyewash station

A supply of running water

A first aider

Sterile bandages

19 / 44

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

Visitor Book

Tally system

Clocking-on machine

Signing-in-book

20 / 44

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

Dizzy, confused, induced state

Decompression incident

Decompression, combustion incident

Decompression illness

21 / 44

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

Telephone

Tannoy system

Two-way radio

Text message

22 / 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

23 / 44

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

Clean out section by section

Split the line

Release the pressure in the pipeline

Locate the blockage

24 / 44

How could hydrogen sulphide affect those working in a tunnel?

It can leave a yellow dust which can irritate the skin

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

25 / 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

Your supervisor would inform you

You would be told at the daily start of shift briefing

26 / 44

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

Crash

Noise

Crush

Asphyxiation

27 / 44

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

Safety harness

Eye protection

Respiratory protective equipment (RPE)

Disposable overalls

28 / 44

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

Hand signals

Radio

Traffic lights

Shouting

29 / 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

30 / 44

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

When installing ventilation cassettes

For services such as cables

When vehicles are passing

For storage of materials and equipment

31 / 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 minimise injury in the event of a derailment

To prevent derailment of the personnel carrying car

To prevent personnel leaning out or falling out

To allow personnel to talk while being transported

32 / 44

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

Paint

Air

Grease

Mud

33 / 44

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

Vibrating hand tools

Falling mined material

Sprayed concrete rebound

Noise

34 / 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

35 / 44

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

15 m

5 m

10 m

20 m

36 / 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

37 / 44

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

1.8 m

1.2 m

1.5 m

0.9 m

38 / 44

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

It causes skin irritation

A smell of rotten eggs

It is odourless

It causes a yellow haze

39 / 44

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

It can be partially cured with medication

It can be prevented if gloves are worn

It can be corrected by surgery

It causes irreversible damage

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

As many as is stated by the supervisor

As many as is stated on the personnel carrier

41 / 44

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

Three

One

Two

Four

42 / 44

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

Shrinking grout hose

Hand-arm vibration

Falls from height

Blowout at injection point

43 / 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

44 / 44

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

Avoid exposure

Provide ventilation systems

Provide air monitoring

Have a portable breathing set nearby

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