6305 H&S LO4 Gases and Fires

Which gas is stored in a cylinder with a blue color and uses a left hand thread direction?

• Propane

• Butane

• Oxygen

• Acetylene

If you see a gas cylinder with a maroon color, which gas does it most likely contain?

• MAPP (mix)

• Acetylene

• Propane

• Oxygen

A technician needs to connect a gas cylinder with a right hand thread direction. Which gas should they expect to be using?

• Propane

• Butane

• Oxygen

• MAPP (mix)

Why is a flashback arrestor an important part of oxyacetylene equipment?

• It measures gas pressure.

• It prevents flames from traveling back into the hoses.

• It controls the flow of gas to the torch.

• It mixes oxygen and acetylene.

If propane is drawn off too quickly from its container, what is a likely consequence?

• The gas will become lighter than air

• The propane will turn into a solid

• The valves can freeze

• The CO₂ will dissipate quickly

Given that LPG is heavier than air, what is a potential risk if it leaks in a confined space?

• It will rise and escape easily

• It will mix with oxygen and become harmless

• It will settle and increase the risk of fire or explosion

• It will turn into a solid at room temperature

Why is it important to use leak detection fluid on joints when inspecting gas equipment?

• To lubricate the joints for easier assembly

• To identify potential gas leaks at the joints

• To clean the equipment

• To prevent rust formation

When transporting gas cylinders in an enclosed vehicle, what additional precaution must be taken?

• Keep cylinders upright with ventilation and label on the outside

• Lay cylinders flat and cover them with a blanket

• Store cylinders in the trunk without labels

• Place cylinders under the seats

A driver transporting quantities of gas must possess which of the following documents, according to Carriage of Dangerous Goods by Road Regulations?

• Tremcard

• Passport

• Invoice

• Driving license only

If you wanted to prevent a fire from starting, which of the following would be the most effective strategy based on the fire triangle shown in the material?

• Increase the amount of fuel

• Remove one of the three elements: fuel, oxygen, or heat

• Add more oxygen to the environment

• Add a spark to the fuel