101. A long delay period in compression ignition engines gives a more rapid rise in pressure which causes knocking.
Yes
No
✅ The correct answer is option A.
IC Engines and Nuclear Power Plants MCQs
102. If the compression ratio in I.C. engine increases, then its thermal efficiency will
decrease
increase
remain same
✅ The correct answer is option B.
103. A fission chain reaction in uranium can be developed
by increasing the contents of U235
by slowing down fast neutrons so that U235 fission continues by slow neutron
both (a) and (b)
none of these
✅ The correct answer is option C.
104. Supercharging is the process of supplying the intake air to the engine cylinder at a density __________ the density of the surrounding atmosphere.
equal to
less than
greater than
✅ The correct answer is option C.
105. A diesel engine, during suction stroke, draws
air only
diesel only
a mixture of diesel and air
✅ The correct answer is option A.
106. The fuels in order of decreasing knock tendency for spark ignition engines are
paraffins, aromatics, napthenes
paraffins, napthenes, aromatics
napthenes, aromatics, paraffins
napthenes, paraffins,
✅ The correct answer is option B.
107. A fuel will detonate less if it has higher self ignition temperature.
TRUE
FALSE
✅ The correct answer is option A.
108. The loud pulsating noise heard within the cylinder of an internal combustion engine is known as
detonation
turbulence
pre-ignition
supercharging
✅ The correct answer is option A.
109. The reflectivity of a reflector is defined as the fraction of neutrons entering the reflector which are returned to the core.
Agree
Disagree
✅ The correct answer is option A.
110. A reactor capable of converting a fertile material into fissile isotopes is called regenerative reactor.
Yes
No
✅ The correct answer is option A.