CSCS Tunnelling Mock Test

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Specialists Test

Tunnelling

1 / 44

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

Evacuate the tunnel

Report it to your supervisor

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

Try to repair it

2 / 44

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

Shrinking grout hose

Hand-arm vibration

Blowout at injection point

Falls from height

3 / 44

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

It is odourless

A smell of rotten eggs

It causes skin irritation

It causes a yellow haze

4 / 44

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

When vehicles are passing

When installing ventilation cassettes

For storage of materials and equipment

For services such as cables

5 / 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

6 / 44

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

Noise

Sprayed concrete rebound

Falling mined material

Vibrating hand tools

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?

Alternative control point

Mirrors at shoulder or crane level

Get one of the gang to build

Use a signaller

8 / 44

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

50 m

25 m

75 m

100 m

9 / 44

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

Emergency pull cord or stop button

Emergency lighting

Hazard lighting

Seat belt

10 / 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

They both have a distinctive bad egg smell

With a calibrated gas detector

With a dosimeter

11 / 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

5 m

15 m

10 m

12 / 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 prevents the atmosphere from becoming explosive

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

13 / 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 = in bye, Green = out bye

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

14 / 44

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

Tally system

Clocking-on machine

Visitor Book

Signing-in-book

15 / 44

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

One

Three

Two

Four

16 / 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

17 / 44

What is the colour of a 400-volt plug?

Black

Blue

Red

Yellow

18 / 44

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

It causes irreversible damage

It can be corrected by surgery

It can be partially cured with medication

It can be prevented if gloves are worn

19 / 44

How should communication equipment be powered?

Independent of the main tunnel power supply

Linked to the main tunnel power supply

Battery-powered

Linked to the 33 kVA power supply

20 / 44

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

Air

Mud

Paint

Grease

21 / 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)

Diesel-powered equipment

Rail-mounted plant

Electro-hydraulic spray pumps

22 / 44

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

45 minutes

30 minutes

15 minutes

60 minutes

23 / 44

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

Two-way radio

Text message

Telephone

Tannoy system

24 / 44

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

Arc eye

Hand-arm vibration syndrome

Inhalation of dust

Cement burns

25 / 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

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 defined by the Health and Safety Executive (HSE)

As many as is stated by the supervisor

27 / 44

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

Environmental Health

The crane operator

The Health and Safety Executive (HSE)

The rescue services

28 / 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 allow personnel to talk while being transported

To stop personnel sitting close together

To prevent personnel leaning out or falling out

To prevent derailment of the personnel carrying car

To minimise injury in the event of a derailment

29 / 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

30 / 44

How would you know if the ventilation system stops working?

An audible alarm would sound

Your supervisor would inform you

You would be informed as part of your induction

You would be told at the daily start of shift briefing

31 / 44

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

Safety harness

Disposable overalls

Eye protection

Respiratory protective equipment (RPE)

32 / 44

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

Decompression, combustion incident

Decompression incident

Decompression illness

Dizzy, confused, induced state

33 / 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 is toxic

It can cause temporary blindness

34 / 44

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

Crash

Crush

Asphyxiation

Noise

35 / 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

36 / 44

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

It must be immediately available

It must be within one minute's walking distance

It must be within three minutes' walking distance

It must be within two minutes' walking distance

37 / 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

Siren

Klaxon bell

CCTV in the cab

Telephone

38 / 44

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

5 m

15 m

20 m

10 m

39 / 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

40 / 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

Water leak

Overheating

Overloading

41 / 44

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

0.9 m

1.5 m

1.8 m

1.2 m

42 / 44

How could hydrogen sulphide affect those working in a tunnel?

It can cause respiratory paralysis, stopping you from breathing

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

It can cause a mist making it difficult to see

It can leave a yellow dust which can irritate the skin

43 / 44

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

20%

19%

21%

18%

44 / 44

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

Working as the signaller at the pit top

Working as the belt-person on a TBM

Building rings from a platform within a shaft

Landing concrete jacking-pipes in the pit bottom

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