201. Each fission of U235 produces on the average __________ fast neutrons as a product of reaction.
2.46
24.6
246
2460
✅ The correct answer is option A.
IC Engines and Nuclear Power Plants MCQs
202. The effective inhibitor of pre-ignition is
alcohol
water
lead
none of these
✅ The correct answer is option B.
203. The compensating jet in a carburettor supplies almost constant amount of petrol at all speeds because the
jet area is automatically varied depending on the suction
the flow from the main jet is diverted to the compensating jet with increase in speed
the diameter of the jet is constant and the discharge coefficient is invariant
flow is produced due to the static head in the float chamber
✅ The correct answer is option D.
204. The pre-ignition occurs before the spark is produced whereas detonation develops after the introduction of spark.
Agree
Disagree
✅ The correct answer is option A.
205. The nuclear power station at Tarapur has the reactor of the __________ type.
pressurized water
boiling water
gas cooled
liquid metal cooled
✅ The correct answer is option B.
206. A diesel engine has
one valve
two valves
three valves
four valves
✅ The correct answer is option C.
207. In a four stroke cycle petrol engine, the inlet valve
opens at top dead centre and closes at bottom dead centre
opens at 20° before top dead centre and closes at 40° after bottom dead centre
opens at 20° after top dead centre and closes at 20° before bottom dead centre id) may open or close anywhere
✅ The correct answer is option B.
208. The energy released during the fission of one atom of Uranium – 235 in million electron volts is about
100
200
300
400
✅ The correct answer is option B.
209. Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, the moderator used is
heavy water
graphite
carbon dioxide
no moderator is needed
✅ The correct answer is option D.
210. In open combustion chamber in diesel engines, the shape and layout of the piston crown, the inlet port and the valve produce the turbulent effect of fuel mixture.
TRUE
FALSE
✅ The correct answer is option A.