CSCS Tunnelling Mock Test

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Specialists Test

Tunnelling

1 / 44

How would you know if the ventilation system stops working?

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

An audible alarm would sound

2 / 44

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

Evacuate the tunnel

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

Report it to your supervisor

Try to repair it

3 / 44

How should communication equipment be powered?

Battery-powered

Linked to the main tunnel power supply

Linked to the 33 kVA power supply

Independent of the main tunnel power supply

4 / 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 prevent personnel leaning out or falling out

To minimise injury in the event of a derailment

To stop personnel sitting close together

To allow personnel to talk while being transported

To prevent derailment of the personnel carrying car

5 / 44

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

It causes irreversible damage

It can be prevented if gloves are worn

It can be partially cured with medication

It can be corrected by surgery

6 / 44

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

When installing ventilation cassettes

For storage of materials and equipment

For services such as cables

When vehicles are passing

7 / 44

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

Tannoy system

Telephone

Two-way radio

Text message

8 / 44

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

Overheating

Water leak

Overloading

Oil spillage

Power loss

9 / 44

What is the colour of a 400-volt plug?

Red

Black

Yellow

Blue

10 / 44

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

Air

Paint

Mud

Grease

11 / 44

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

It causes skin irritation

It is toxic

It is explosive

It reduces oxygen in the atmosphere

It can cause temporary blindness

12 / 44

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

Dizzy, confused, induced state

Decompression, combustion incident

Decompression illness

Decompression incident

13 / 44

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

Clocking-on machine

Visitor Book

Signing-in-book

Tally system

14 / 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?

Mirrors at shoulder or crane level

Use a signaller

Get one of the gang to build

Alternative control point

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 two minutes' walking distance

It must be immediately available

It must be within three minutes' walking distance

16 / 44

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

Hand signals

Shouting

Traffic lights

Radio

17 / 44

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

1.2 m

0.9 m

1.8 m

1.5 m

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

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

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

19 / 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 is stated on the personnel carrier

As defined by the Health and Safety Executive (HSE)

As many as can fit into it

As many as is stated by the supervisor

20 / 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

Only when everyone else starts to move

When you have identified the direction of travel

Only when you can see it

21 / 44

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

Crash

Asphyxiation

Noise

Crush

22 / 44

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

15 m

10 m

20 m

5 m

23 / 44

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

It causes skin irritation

It is odourless

It causes a yellow haze

A smell of rotten eggs

24 / 44

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

Arc eye

Hand-arm vibration syndrome

Cement burns

Inhalation of dust

25 / 44

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

19%

21%

18%

20%

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?

Signal or traffic lights

Klaxon bell

Siren

CCTV in the cab

Telephone

27 / 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

28 / 44

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

Sprayed concrete rebound

Noise

Vibrating hand tools

Falling mined material

29 / 44

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

Eye protection

Respiratory protective equipment (RPE)

Safety harness

Disposable overalls

30 / 44

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

One

Four

Two

Three

31 / 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

32 / 44

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

Seat belt

Hazard lighting

Emergency pull cord or stop button

Emergency lighting

33 / 44

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

60 m on straights; 30 m on curves

70 m on straights; 25 m on curves

80 m on straights; 20 m on curves

50 m on straights; 25 m on curves

34 / 44

How could hydrogen sulphide affect those working in a tunnel?

It can cause respiratory paralysis, stopping you from breathing

It can cause a mist making it difficult to see

It can leave a yellow dust which can irritate the skin

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

35 / 44

Why is it important to clean grouting pipelines after use?

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

It helps prevent the pipes from becoming weakened

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

It prevents the atmosphere from becoming explosive

36 / 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

37 / 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

Tunnel-boring machines (TBMs)

Electro-hydraulic spray pumps

Rail-mounted plant

38 / 44

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

A supply of running water

A first aider

An eyewash station

Sterile bandages

39 / 44

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

Environmental Health

The Health and Safety Executive (HSE)

The crane operator

The rescue services

40 / 44

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

Building rings from a platform within a shaft

Working as the signaller at the pit top

Working as the belt-person on a TBM

Landing concrete jacking-pipes in the pit bottom

41 / 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

With a calibrated gas detector

They both have a distinctive bad egg smell

42 / 44

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

75 m

100 m

25 m

50 m

43 / 44

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

Split the line

Release the pressure in the pipeline

Clean out section by section

Locate the blockage

44 / 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

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