WELDING

Atomic hydrogen welding is a type of
1. Arc welding
2. Gas welding
3. Resistance welding
4. Solid state welding
Which of the following is not a characteristic of AC transformer?
1. High efficiency
2. Low power cost
3. Low machine cost
4. Runs on low voltage
Which of the following are types of consumable electrodes?
1. Bare electrodes
2. Lightly coated electrodes
3. Heavily coated electrodes
4. All of these
Gas welding is
1. the process of welding carried out by an electric arc.
2. the process of melting and joining
  metal parts by means of a gas flame.
3. also known as pressure welding.
4. None of these
Carburising flame
1. is obtained by supplying more oxygen than acetylene.
2. equal quantities of oxygen and acetylene
3. is also known as reducing flame.
4. None of these
Which of the following is a disadvantage of gas welding?
1. The cost of maintenance is high.
2. The process of welding is slow.
3. The strength of the joint is less
4. Both B and C
Filler rods
1. supply the additional metal in making joints.
2. used to control the working pressure of the gases.
3. used to connect the two cylinders with the welding torch through regulators.
4. None of these
In brazing,
1. filler metal in molten state is filled between the metal parts of the joint.
2. coating a hard material on soft metal parts.
3. Two parts made of similar or dissimilar metals are joined
4. None of these
Lap Joint
1. is made by keeping the metal plates at perpendicular to each other.
2. the corners or the edges of two metal parts are joined.
3. The plates of the joint may be kept parallel or perpendicular to each other.
4. is a joint in which the metal plates are placed over lapping before welding.
The heat generated during arc welding is
1. 100 C-150 C
2. 50 C-100 C
3. 5000 C-6000 C
4. 15 C-200 C

WELDING

Quiz