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

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

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

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

If a locomotive or vehicle is approaching you in the tunnel, when should you make your way to a hop-up or safe refuge?

How could hydrogen sulphide affect those working in a tunnel?

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

The tunnel-boring machine operator has restricted vision during the building process. Which of the following is the most effective way of overcoming this?

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

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

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?

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

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

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

Why is it important to clean grouting pipelines after use?

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

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?

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

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

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

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

What is the colour of a 400-volt plug?

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

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

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

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

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

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

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

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

How would you know if the ventilation system stops working?

How should communication equipment be powered?

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

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

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

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

Which of the following is a common traffic light system used underground to control plant movement?

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

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

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

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

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

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

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.