1000+ Heating and Welding Objective Questions and Answers Pdf - 2

Question: 6

The tips of the electrodes, for spot welding, are made of

(A) carbon

(B) mica

(C) porcelain

(D) copper alloy

Question: 7

Steel pipes are manufactured by

(A) arc welding

(B) resistance welding

(C) thermit welding

(D) argon arc welding

Question: 8

Which of the following automatic welding processes is likely to give maximum rate of metal deposition?

(A) submerged arc (single wire)

(B) gas shielded bare wire

(C) multiple power submerged arc

(D) continuous flux covered electrode

Question: 9

In D.C. arc welding

(A) both electrode as well as workpiece are made negative

(B) both electrode as well as workpiece are made positive

(C) electrode is made negative and workpiece positive

(D) electrode is made positive and work piece negative

Question: 10

Heat transfer by condition will not occur when

(A) temperature of the two bodies are identical

(B) bodies are exposed to thermal radiations

(C) bodies are immersed in water

(D) bodies are kept in vacuum