WorksheetsGas Welding Quiz
Total questions: 30
Worksheet time: 15mins
What is the most common fuel gas used in gas welding combined with Oxygen?
Propane
Acetylene
Argon
Helium
What is the main function of Oxygen in gas welding?
To burn as fuel
To support and speed up combustion
To cool the torch
To clean the metal
What is the standard color code for an Oxygen hose?
Red
Green or Blue
Black
Yellow
What is the standard color code for an Acetylene hose?
Red
Green
Black
White
Which flame is used for welding mild steel?
Carburizing Flame
Oxidizing Flame
Neutral Flame
Reducing Flame
An Oxidizing flame has an excess of:
Acetylene
Oxygen
Nitrogen
Hydrogen
A Carburizing flame has an excess of:
Acetylene
Oxygen
Argon
Heat
What is the purpose of a Flashback Arrestor?
To increase gas pressure
To mix the gases
To prevent the flame from traveling back into the cylinders
To light the torch
What connects the gas regulator to the welding torch?
A copper pipe
A flexible rubber hose
A steel chain
An electric wire
Which tool is used to safely light the welding flame?
A matchstick
A cigarette lighter
A spark lighter / Flint striker
A burning piece of paper
Acetylene becomes unstable and dangerous if compressed above which pressure?
5 PSI
10 PSI
15 PSI
100 PSI
How should gas cylinders be secured to prevent them from falling?
Hold them with your hands
Chain them to a wall or trolley
Leave them standing freely
Lay them on the floor
Why is good ventilation important in a welding workshop?
To remove dangerous fumes and gases
To make the room cold
To keep the welding machine clean
To let insects in
What is the function of the Regulator?
To mix the gases
To store the gas
To reduce high cylinder pressure to working pressure
To ignite the flame
What should you do to the metal surface before welding?
Paint it
Clean it from rust, oil, and paint
Pour water on it
Heat it with a lighter
Which PPE protects your body and clothes from sparks?
A plastic raincoat
A leather apron
A cotton t-shirt
A nylon jacket
What is the easiest position for welding?
Overhead position
Vertical position
Flat position
Upside down
What is the correct method to check for gas leaks?
Use a lighter
Smell it only
Use soapy water or a leak detection solution
Listen closely with your ear
What is Backfire?
The flame burns back into the torch with a loud pop and extinguishes
The flame burns inside the cylinder
The cylinder explodes
The hose catches fire
What is Flashback?
A momentary pop of the flame
The flame retreats into the torch and burns back towards the regulator
The torch tip gets clogged
The metal melts too fast
What happens if you hold the flame in one spot for too long?
The metal will freeze
You will burn a hole through the metal
The metal will become stronger
The flame will turn off
Which welding technique involves moving the torch from right to left (for right-handed welders)?
Rightward welding
Leftward welding
Vertical welding
Overhead welding
What tool should you use to hold hot metal?
Your gloved hand
Pliers or Tongs
A piece of cloth
A plastic bag
When you finish welding, where should you hang the torch?
Throw it on the floor
Hang it in a safe place designated for it
Put it inside your pocket
Hang it on the gas cylinder valve
Which of the following is NOT a type of oxy-acetylene flame?
Neutral
Oxidizing
Carburizing
Plasma
The temperature of a Neutral oxy-acetylene flame is approximately:
1000 C
2500 C
3200 C
5000 C
What is the purpose of the filler rod?
To create the arc
To supply additional metal to the weld pool
To clean the nozzle
To protect the welder's eyes
What PPE is essential to protect eyes from UV/IR radiation and sparks during gas welding?
Sunglasses
Clear safety glasses
Welding goggles with the correct shade
A face shield made of plastic
If the torch tip gets clogged, what tool should be used to clean it?
A needle or wire
A drill bit
A specialized Tip Cleaner
A nail
Before leaving the welding station, what must be done?
Leave the valves open
Close cylinder valves and clean workspace
Drop the torch on the floor
Tangle the hoses
