CSCS Tunnelling Mock Test

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Specialists Test

Tunnelling

1 / 44

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

Telephone

Text message

Tannoy system

Two-way radio

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

Why is it important to clean grouting pipelines after use?

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

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

4 / 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

Power loss

Overloading

Overheating

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?

Only when you can see it

Only when everyone else starts to move

When you have identified the direction of travel

Immediately

6 / 44

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

Four

One

Two

Three

7 / 44

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

50 m

100 m

75 m

25 m

8 / 44

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

Provide ventilation systems

Avoid exposure

Provide air monitoring

Have a portable breathing set nearby

9 / 44

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

It is odourless

It causes a yellow haze

A smell of rotten eggs

It causes skin irritation

10 / 44

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

The Health and Safety Executive (HSE)

The rescue services

Environmental Health

The crane operator

11 / 44

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

10 m

20 m

15 m

5 m

12 / 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

13 / 44

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

Emergency lighting

Hazard lighting

Seat belt

Emergency pull cord or stop button

14 / 44

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

Hand signals

Traffic lights

Radio

Shouting

15 / 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

16 / 44

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

Tally system

Signing-in-book

Clocking-on machine

Visitor Book

17 / 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

18 / 44

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

Crush

Crash

Asphyxiation

Noise

19 / 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

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?

Alternative control point

Mirrors at shoulder or crane level

Get one of the gang to build

Use a signaller

21 / 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

10 m

5 m

22 / 44

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

Paint

Grease

Air

Mud

23 / 44

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

With a dosimeter

With a calibrated gas detector

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

They both have a distinctive bad egg smell

24 / 44

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

21%

18%

20%

19%

25 / 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)

Electro-hydraulic spray pumps

Rail-mounted plant

Diesel-powered equipment

26 / 44

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

1.5 m

0.9 m

1.2 m

1.8 m

27 / 44

What is the colour of a 400-volt plug?

Red

Yellow

Blue

Black

28 / 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 many as is stated by the supervisor

As many as can fit into it

As defined by the Health and Safety Executive (HSE)

29 / 44

How should communication equipment be powered?

Battery-powered

Linked to the 33 kVA power supply

Independent of the main tunnel power supply

Linked to the main tunnel power supply

30 / 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

Working as the signaller at the pit top

Landing concrete jacking-pipes in the pit bottom

31 / 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

32 / 44

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

Decompression, combustion incident

Decompression illness

Dizzy, confused, induced state

Decompression incident

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 is a common traffic light system used underground to control plant movement?

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

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

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

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

35 / 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 prevent derailment of the personnel carrying car

To prevent personnel leaning out or falling out

To minimise injury in the event of a derailment

To stop personnel sitting close together

36 / 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

Evacuate the tunnel

Try to repair it

Report it to your supervisor

37 / 44

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

15 minutes

45 minutes

30 minutes

60 minutes

38 / 44

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

Release the pressure in the pipeline

Clean out section by section

Locate the blockage

Split the line

39 / 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

50 m on straights; 25 m on curves

70 m on straights; 25 m on curves

40 / 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

Telephone

Siren

Klaxon bell

41 / 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

42 / 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 cause respiratory paralysis, stopping you from breathing

It can leave a yellow dust which can irritate the skin

43 / 44

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

For services such as cables

When vehicles are passing

When installing ventilation cassettes

For storage of materials and equipment

44 / 44

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

It reduces oxygen in the atmosphere

It causes skin irritation

It is toxic

It is explosive

It can cause temporary blindness

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