241. __________ mechanism produces mathematically an exact straight-line motion.
(A) Scotch yoke Mechanism
(B) Elliptical Trammel
(C) Peaucellier's
(D) None of these
Answer: - Peaucellier's
242. The size of cam depends on _________ circle
(A) prime
(B) base
(C) outer
(D) pitch
Answer: - base
243. A kinematic chain is known as a mechanism when _______ of the links is fixed.
(A) one
(B) two
(C) three
(D) none of these
Answer: - one
244. A rack is a gear of _______.
(A) infinite teeth
(B) infinite diameter
(C) infinite pitch
(D) none of these
Answer: - infinite diameter
245. The central gear of an epicyclic gear train is called a _________.
(A) Internal gear
(B) Ring gear
(C) Planet gear
(D) Sun gear
Answer: - Sun gear
246. Spring index is
(A) ratio of coil diameter to wire diameter
(B) load required to produce unit deflection
(C) its capability of storing energy
(D) indication of quality of spring
Answer: - ratio of coil diameter to wire diameter
247. Heat transfer deals with the rate of
(A) work transfer
(B) temperature transfer
(C) energy transfer
(D) none of these
Answer: - energy transfer
248. Viscosity of a fluid can be defined as
(A) change in density of the fluid per unit temperature
(B) flow resistance offered by the fluid
(C) flow velocity change
(D) none of these
Answer: - flow resistance offered by the fluid
249. The radiation takes place
(A) through molecular communication
(B) through vacuum
(C) both A and B
(D) none of the these
Answer: - through vacuum
250. What is emissive power of a body?
(A) total radiation emitted by the body per unit volume per unit time
(B) total radiation emitted by the body per unit temperature per unit time
(C) total radiation emitted per unit area per unit time
(D) all of these
Answer: - total radiation emitted per unit area per unit time.
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