01.The volumetric change of the fluid caused by a resistance is known as
(A)volumetric strain
(B) volumetric index
(C) compressibility
(D) adhesion
02.Density of water is maximum at
(A) 0°C
(B) 0°K
(C) 4°C
(D) 100°C
03.The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as
(B) center of pressure
(C) center of buoyancy
(D) center of gravity
04.Metals are good conductors of heat because
(A) their atoms collide frequently
(B) their atoms-are relatively far apart
(C) they contain free electrons
(D) they have high density
05.The relative coefficient of performance is
(A) actual COP/theoretical COP
(B) theoretical COP/actual COP
(C) actual COP × theoretical COP
(D) 1-actual COP × theoretical COP
06.The boiling point of ammonia is
(A) –100°C
(B) –50°C
(C) –33.3°C
(D) 0°C
07.The thermal efficiency of a diesel cycle having fixed compression ratio, with increase in
cut-off ratio will
(A) increase
(B) decrease
(C) be independent
(D) may increase or decrease depending on other factors
08.As a result of detonation in an I.C. engine, following parameter attains very high value
(A) peak pressure
(B) rate of rise of pressure
(C) rate of rise of temperature
(D) peak temperature
09.The theoretically correct air fuel ratio for petrol engine is of the order of
(A) 6 : 1
(B) 9 : 1
(C) 12 : 1
(D) 15 : 1
10.Pour point of fuel oil is the
(A) minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame
(B) temperature at which it solidifies or congeals
(C) it catches fire without external aid
(D) 90% of sample oil has distilled off
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