CSCS Tunnelling Mock Test

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Specialists Test

Tunnelling

1 / 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 can cause temporary blindness

It is explosive

2 / 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 three minutes' walking distance

It must be within two minutes' walking distance

3 / 44

How would you know if the ventilation system stops working?

An audible alarm would sound

Your supervisor would inform you

You would be told at the daily start of shift briefing

You would be informed as part of your induction

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

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

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

5 / 44

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

It can be corrected by surgery

It can be prevented if gloves are worn

It can be partially cured with medication

It causes irreversible damage

6 / 44

What is the colour of a 400-volt plug?

Red

Blue

Black

Yellow

7 / 44

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

Hazard lighting

Seat belt

Emergency pull cord or stop button

Emergency lighting

8 / 44

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

100 m

25 m

50 m

75 m

9 / 44

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

Two-way radio

Telephone

Text message

Tannoy system

10 / 44

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

A smell of rotten eggs

It causes a yellow haze

It is odourless

It causes skin irritation

11 / 44

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

Crash

Asphyxiation

Noise

Crush

12 / 44

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

For services such as cables

For storage of materials and equipment

When vehicles are passing

When installing ventilation cassettes

13 / 44

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

Rail-mounted plant

Electro-hydraulic spray pumps

Diesel-powered equipment

Tunnel-boring machines (TBMs)

14 / 44

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

Building rings from a platform within a shaft

Landing concrete jacking-pipes in the pit bottom

Working as the signaller at the pit top

Working as the belt-person on a TBM

15 / 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 derailment of the personnel carrying car

To stop personnel sitting close together

To allow personnel to talk while being transported

To prevent personnel leaning out or falling out

To minimise injury in the event of a derailment

16 / 44

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

18%

19%

20%

21%

17 / 44

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

Inhalation of dust

Cement burns

Arc eye

Hand-arm vibration syndrome

18 / 44

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

The Health and Safety Executive (HSE)

The crane operator

Environmental Health

The rescue services

19 / 44

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

Clean out section by section

Locate the blockage

Split the line

Release the pressure in the pipeline

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?

Mirrors at shoulder or crane level

Alternative control point

Use a signaller

Get one of the gang to build

21 / 44

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

Radio

Traffic lights

Hand signals

Shouting

22 / 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?

5 m

15 m

20 m

10 m

23 / 44

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

Vibrating hand tools

Noise

Falling mined material

Sprayed concrete rebound

24 / 44

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

Evacuate the tunnel

Try to repair it

Report it to your supervisor

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

25 / 44

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

Overheating

Oil spillage

Water leak

Power loss

Overloading

26 / 44

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

Visitor Book

Tally system

Signing-in-book

Clocking-on machine

27 / 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

1.2 m

1.8 m

28 / 44

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

Falls from height

Shrinking grout hose

Hand-arm vibration

Blowout at injection point

29 / 44

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

An eyewash station

Sterile bandages

A supply of running water

A first aider

30 / 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 leave a yellow dust which can irritate the skin

It can cause a mist making it difficult to see

31 / 44

Why is it important to clean grouting pipelines after use?

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

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 prevents the atmosphere from becoming explosive

32 / 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)

33 / 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

34 / 44

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

Decompression, combustion incident

Dizzy, confused, induced state

Decompression illness

Decompression incident

35 / 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

Immediately

Only when everyone else starts to move

When you have identified the direction of travel

36 / 44

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

With a calibrated gas detector

With a dosimeter

They both have a distinctive bad egg smell

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

37 / 44

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

Provide ventilation systems

Provide air monitoring

Avoid exposure

Have a portable breathing set nearby

38 / 44

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

Grease

Air

Paint

Mud

39 / 44

How should communication equipment be powered?

Independent of the main tunnel power supply

Linked to the 33 kVA power supply

Linked to the main tunnel power supply

Battery-powered

40 / 44

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

15 m

10 m

5 m

20 m

41 / 44

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

80 m on straights; 20 m on curves

70 m on straights; 25 m on curves

50 m on straights; 25 m on curves

60 m on straights; 30 m on curves

42 / 44

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

45 minutes

30 minutes

60 minutes

15 minutes

43 / 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

44 / 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

Klaxon bell

Telephone

CCTV in the cab

Signal or traffic lights

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