1000+ Heating and Welding Objective Questions and Answers Pdf - 1

Question: 1

When a body reflects entire radiation incident on it, then it is known as

(A) transparent body

(B) black body

(C) grey body

(D) white body

Question: 2

In a resistance furnace the atmosphere is

(A) neutral

(B) reducing

(C) oxidising

(D) deoxidising

Question: 3

Radiant heating is used for which of the following?

(A) drying of paints and varnishes

(B) heating of liquids in electric kettle

(C) melting of ferrous metals

(D) annealing of metals

Question: 4

Electric arc welding process produces temperature upto

(A) 1000°C

(B) 1500°C

(C) 3500°C

(D) 5550°C

Question: 5

During arc welding as the thickness of the metal to be welded increases

(A) voltage should increase, current remaining the same

(B) current should increase, voltage should decrease

(C) current should increase, voltage remaining the same

(D) current should decrease, voltage should increase