temperature
volume
density
none of these
✅ The correct answer is option C.
IC Engines and Nuclear Power Plants MCQs
62. The cetane (C16H34) which is a straight chain paraffin is assigned a cetane number of
0
50
100
120
✅ The correct answer is option C.
63. In a petrol engine, the fuel supplied to the engine cylinder is mixed with required quantity of air and the mixture is ignited with a
fuel pump
fuel injector
spark plug
none of these
✅ The correct answer is option C.
64. A two stroke cycle engine gives __________ the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.
half
same
double
four times
✅ The correct answer is option C.
65. In order to mix air and petrol in the required proportion and to supply it to the engine during suction stroke, then __________ is employed.
fuel pump
injector
carburettor
none of these
✅ The correct answer is option C.
66. The relative efficiency of an I.C. engine is the ratio of the indicated thermal efficiency to the air standard efficiency.
Correct
Incorrect
✅ The correct answer is option A.
67. A mixture containing 65% of iso-octane and 35% of normal heptane will have
cetane number 65
octane number 65
qetane number 35
octane number 35
✅ The correct answer is option B.
68. Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has
high neutron absorption cross-section
low moderating efficiency
high neutron scatter cross-section
low neutron absorption
✅ The correct answer is option B.
69. If V1 is the jet velocity and V0 is the vehicle velocity, then the propulsive efficiency of a rocket is given by
✅ The correct answer is option A.
70. The normal heptane (C7H16) is given a rating of __________ octane number.
0
50
100
120
✅ The correct answer is option A.