Author name: Admin

A. Drain out water and sludge from the boiler during repair

B. Put off fire in the furnace when water level in the boiler falls to unsafe limit

C. Guard the boiler in case of abnormal rise in steam pressure

D. All of the above

A. Critical temperature

B. Recrystallisation temperature

C. Phase transformation temperature

D. Transition temperature

A. Cast iron

B. Wrought iron

C. Mild steel

D. Semi-steel

A. Normalising

B. Annealing

C. Tempering

D. Hardening

A. Small punches, broaches reamers and springs

B. Cutlery, screws, rivets and files

C. Mandrels, twist drills, small lathe tools and razors

D. Forgings like can shaft, structural steel plate, threading dies and drawing dies

A. Radio waves

B. Ultrasonic waves

C. Infra red rays

D. X-rays

A. Blades of gas turbine

B. Piston of an I. C. engine

C. Flywheel of steam engine

D. Cycle chain

A. Counter current reactor

B. Co-current reactor

C. Cross-current reactor

D. Combination of all the three

A. Should be friable

B. Should have low refractoriness

C. Is made up of large size of crystals

D. Should be soft

A. 8.82

B. 9.81

C. 10.88

D. 0.95