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?

Try to repair it

Evacuate the tunnel

Report it to your supervisor

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

2 / 44

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

A first aider

An eyewash station

A supply of running water

Sterile bandages

3 / 44

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

It is toxic

It reduces oxygen in the atmosphere

It causes skin irritation

It is explosive

It can cause temporary blindness

4 / 44

How could hydrogen sulphide affect those working in a tunnel?

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

It can cause respiratory paralysis, stopping you from breathing

5 / 44

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

30 minutes

15 minutes

45 minutes

60 minutes

6 / 44

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

Asphyxiation

Noise

Crush

Crash

7 / 44

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

Decompression, combustion incident

Decompression illness

Decompression incident

Dizzy, confused, induced state

8 / 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

9 / 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

10 / 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

11 / 44

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

It must be within three minutes' walking distance

It must be within one minute's walking distance

It must be immediately available

It must be within two minutes' walking distance

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

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

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

13 / 44

How would you know if the ventilation system stops working?

You would be told at the daily start of shift briefing

An audible alarm would sound

Your supervisor would inform you

You would be informed as part of your induction

14 / 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

Disposable overalls

Respiratory protective equipment (RPE)

15 / 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

16 / 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

20 m

5 m

10 m

17 / 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

18 / 44

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

Telephone

Text message

Two-way radio

Tannoy system

19 / 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

20 / 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

Alternative control point

Mirrors at shoulder or crane level

21 / 44

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

10 m

15 m

5 m

20 m

22 / 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

23 / 44

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

Grease

Mud

Air

Paint

24 / 44

What is the colour of a 400-volt plug?

Yellow

Blue

Black

Red

25 / 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

26 / 44

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

CCTV in the cab

Signal or traffic lights

Klaxon bell

Siren

Telephone

27 / 44

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

When vehicles are passing

For services such as cables

For storage of materials and equipment

When installing ventilation cassettes

28 / 44

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

50 m

25 m

75 m

100 m

29 / 44

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

The Health and Safety Executive (HSE)

Environmental Health

The rescue services

The crane operator

30 / 44

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

Falls from height

Hand-arm vibration

Blowout at injection point

Shrinking grout hose

31 / 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 causes irreversible damage

It can be corrected by surgery

32 / 44

How should communication equipment be powered?

Battery-powered

Independent of the main tunnel power supply

Linked to the main tunnel power supply

Linked to the 33 kVA power supply

33 / 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

34 / 44

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

18%

19%

21%

20%

35 / 44

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

Overloading

Oil spillage

Power loss

Overheating

Water leak

36 / 44

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

Diesel-powered equipment

Electro-hydraulic spray pumps

Rail-mounted plant

Tunnel-boring machines (TBMs)

37 / 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 is stated on the personnel carrier

As many as can fit into it

38 / 44

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

Cement burns

Arc eye

Inhalation of dust

Hand-arm vibration syndrome

39 / 44

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

1.8 m

0.9 m

1.2 m

1.5 m

40 / 44

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

Radio

Shouting

Hand signals

Traffic lights

41 / 44

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

Two

One

Four

Three

42 / 44

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

Sprayed concrete rebound

Falling mined material

Noise

Vibrating hand tools

43 / 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

44 / 44

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

Clocking-on machine

Visitor Book

Signing-in-book

Tally system

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