O O 108/2017

87.

88.

89.

90.

81.

82.

93.

94.

The flux commonly used in brazing is

A} Zinc chloride B) Ammonium chloride

© Borax D} Rosin plus alcohol

In arc welding, the temperature of heat produced by the electric arc is of the order of
A} 3000°C to 4000°C B) 4000°C to 5000°C

0) 5000°C to 6000°C D) 6000°C to 7000°C

The operation of cutting of a flat sheet to the desired shape is called

A} Blanking 18) Shearing
C) Piercing D) Punching

Good surface finish and better dimensional accuracy can be achieved in
A} Hot working B) Cold working
0) Both A) and 8) D) None of the above

Hot working process is the plastic deformation of metal which is carried out
A} At temperature below the recrystallisation temperature

B) At the melting temperature of the metal

C) At temperature above the recrystallisation temperature

D) None of the above

Principle of unit load state that

A} Materials should be moved in lots
B) One unit should be moved at a time
© Both A) and B)

D) None of the above

Fork lift is used for
A) Lifting and lowering B) Vertical transportation
© Both A) and B) D) None of the above

Gas molecules that absorb thermal infrared radiation and are present in large quantity
to change climate system are known as

A) Alpha radiations B) Beta radiations
© 02008 85 D) Greenhouse gases

13-