191. The purpose of gear box in an automobile is to
(A) Vary speed
(B) Vary torque
(C) Provide permanent speed reduction
(D) To disconnect the road wheels from the engine when desired
Answer: - Vary torque
192. The Bifilar suspension method is used to determine
(A) Natural frequency of vibration
(B) Position of balancing weights
(C) Moment of inertia
(D) Centripetal acceleration
Answer: - Moment of inertia
193. Blast furnace produces following by reduction of iron ore
(A) Cast iron
(B) Pig iron
(C) Wrought iron
(D) Malleable iron
Answer: - Pig iron
194. In nitrided steel components, the following atmosphere is generally used in the furnace
(A) Liquid nitrogen
(B) Ammonia
(C) Carbon
(D) Inert
Answer: - Ammonia
195. TIG welding is best suited for welding
(A) Aluminium
(B) Mild steel
(C) Carbon steel
(D) Silver
Answer: - Aluminium
196. Solder is essentially a
(A) Tin-Silver base
(B) Tin-lead base
(C) Silver lead base
(D) Tin-bismuth base
Answer: - Tin-lead base
197. S-curve is connected with
(A) Combustion
(B) Cutting tools
(C) Corrosion
(D) Heat treatment
Answer: - Heat treatment
198. Ornamental objects, statues, toys etc. are cast by
(A) Die casting
(B) Continuous casting
(C) Centrifugal casting
(D) Slush casting
Answer: - Slush casting
199. Coining is the operation of
(A) Cold forging
(B) Hot forging
(C) Cold extrusion
(D) Piercing
Answer: - Cold forging
200. Half nut is connected with
(A) Thread cutting on lathe
(B) Quick engaging and disengaging devices
(C) Jigs and fixtures
(D) Milling machine
Answer: - Thread cutting on lathe
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