WELDING

Carbon Arc welding is related to
1. Gas welding
2. Resistance welding
3. Arc welding
4. Solid state welding
Plastic welding is
1. Pressure welding
2. Resistance welding
3. Fusion welding
4. Arc welding
Fusion welding is
1. Pressure welding
2. Non-pressure welding
3. Resistance welding
4. Thermit welding
Oxidising flame is obtained by
1. supplying more oxygen than acetylene.
2. supplying more acetylene than oxygen
3. equal quantities of oxygen and acetylene.
4. None of these
Oxy acetylene flame emits
1. UV rays
2. Infrared rays
3. Both a and b
4. None of these
Spark lighter
1. used to ignite the oxy-acetylene gas at the tip of the welding torch.
2. useful for cleaning the weld before and after the welding process.
3. used by the operator to prevent possible damages that may be caused by high temperatures and metal splashes during welding.
4. None of these
Colour of oxygen gas cylinder
1. Black
2. Maroon
3. Blue
4. Red
Regulators are
1. used to control the working pressure of the gases.
2. used to connect the two cylinders with the welding torch through regulators.
3. used to ignite the oxy-acetylene gas at the tip of the welding torch.
4. used to provide the additional metal required for making the joint.
Which of these is not a characteristic of DC generator
1. Low efficiency
2. Runs on low voltage
3. High power cost
4. High process cost
How many types are there by which welding is performed?
1. 2
2. 3
3. 4
4. More than 4