171. COP in dry compression as compared to wet compression is
(A) Higher
(B) Lower
(C) Same
(D) None of above
Answer: - Lower
172. The automobile radiator is heat exchanger of
(A) Parallel flow type
(B) Counter flow type
(C) Cross flow type
(D) Regenerator type
Answer: - Cross flow type
173. The total strain energy stored in a body is termed as
(A) Resilience
(B) Proof resilience
(C) Modulus of resilience
(D) Toughness
Answer: - Resilience
174. Slow plastic deformation of metal under a constant stress is known as
(A) Creep
(B) Fatigue
(C) Endurance
(D) Plastic deformation
Answer: - Creep
175. A steel is specified as En 42. This is as per following standard
(A) French
(B) American
(C) British
(D) Japanese
Answer: - British
176. Vertical shaft arrangement in hydroelectric plants is used to
(A) Permit smallest power house
(B) Encounter minimum vibrations
(C) Have high efficiency
(D) Have simple structure
Answer: - Permit smallest power house
177. The basic purpose of using a flywheel on rotating machinery is to
(A) Allow rapid acceleration
(B) Store and release energy as required
(C) Control rotational speed
(D) Balance the rotating parts
Answer: - Store and release energy as required
178. Rain drops are spherical because of
(A) Viscosity
(B) Air resistance
(C) Surface tension
(D) Atmospheric pressure
Answer: - Surface tension
179. In which of the following cases, the strength of joint obtained is lowest ?
(A) Welding
(B) Branzing
(C) Soldering
(D) Riveting
Answer: - Soldering
180. Which of the following is the binding material in cemented carbides ?
(A) Vanadium
(B) Nickel
(C) Cobalt
(D) Iron
Answer: - Cobalt
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