WorksheetsMTL1 H&S Learner Outcome 8
Total questions: 27
Worksheet time: 14mins
Which gas is stored in a maroon-coloured cylinder with a left-hand thread?
Propane
MAPP
Acetylene
Oxygen
Which of the following gases is heavier than air and has a distinctive smell of rotten eggs due to ethanethiol?
Oxygen
Propane
MAPP
Acetylene
Why is MAPP gas preferred over propane for soldering with lead-free solder?
It is cheaper
It is heavier than air
It produces a cooler flame
It provides a hotter flame
Which of the following gases is used in conjunction with oxygen for welding and brazing and has a relative density of 0.9?
Propane
MAPP
Acetylene
Oxygen
Which of the following is a mandatory requirement for all vehicles transporting gas cylinders?
A first aid kit
A 2kg dry powder fire extinguisher
A warning triangle
A carbon monoxide detector
What should a driver do if a gas leak is suspected during transport?
Continue driving to the nearest service station
Open all windows and drive slowly
Park in a safe place and contact the supplier immediately
Attempt to fix the leak themselves
When storing gas cylinders, which of the following practices is correct?
Store LPG cylinders with other types of gases
Store cylinders lying down to prevent toppling
Store full and empty cylinders together
Store cylinders upright and secured
What is the correct thread direction for an acetylene cylinder connection?
Right-hand thread
Left-hand (reverse) thread
Universal thread
Clockwise thread
What is the purpose of a flashback arrester in a welding setup?
To increase gas pressure
To prevent gas leaks
To stop flame from travelling back into the hoses and cylinders
To regulate temperature during welding
Which colour is used for oxygen hoses in welding equipment?
Red
Green
Blue
Yellow
What is the function of non-return valves in a welding system?
To allow gas to flow in both directions
To prevent gas from flowing backwards in the lines
To increase gas flow rate
To mix oxygen and acetylene
What should be used to check for leaks in oxy-acetylene equipment?
Soapy water
A naked flame
Leak detection fluid suitable for oxy-acetylene
Compressed air
Which tool should be used to light the acetylene flame?
A gas lighter
A match
A spark lighter
A cigarette lighter
What should you do if you smell acetylene during setup or use?
Use a naked flame to locate the leak
Continue working and monitor the smell
Use leak detection fluid and follow emergency procedures
Ventilate the area and ignore the smell
How do you correctly ignite an oxy-acetylene torch?
Open both gas valves fully and light with a match
Open the oxygen valve first and light with a gas lighter
Open the acetylene valve ¼ turn and light with a spark lighter
Light the torch with a mixed gas condition using a spark lighter
Which three elements make up the fire triangle?
Heat, smoke, and oxygen
Fuel, oxygen, and ignition(heat)
Flame, fuel, and carbon dioxide
Oxygen, nitrogen, and heat
Which method is used to remove oxygen from a fire?
Pouring petrol on it
Using a CO₂ or foam extinguisher
Increasing the heat
Adding more fuel
Which of the following is considered a source of ignition in plumbing work?
Dust and vapours
Water pipes
Boilers and soldering equipment
Insulation materials
What is the primary reason for using a fire extinguisher in the workplace?
To completely extinguish the fire
To protect equipment
To aid safe evacuation
To avoid calling the fire service
Which fire extinguisher is suitable for electrical fires (Class E)?
Water
Foam
CO₂
Wet chemical
When should you stop attempting to fight a fire?
When the extinguisher is half full
When the fire is small
When your escape route is at risk
When the fire service arrives
What Colour fire extinguisher is Co2
Red
Blue
Cream
Black
What Colour fire extinguisher is Water
Red
Blue
Cream
Black
What Colour fire extinguisher is Foam
Red
Blue
Cream
Black
What Colour fire extinguisher is Powder
Red
Blue
Cream
Black
Which type of fire is a water-filled fire extinguisher suitable for?
Electrical fires
Flammable liquid fires
Solid material fires
Gas fires
Which extinguisher is considered ‘multi-purpose’ and can be used on Class A, B, and C fires?
Foam
CO₂
Water
Dry powder
