21. Solid fuel fabricated into various small shapes, which are assembled to form fuel elements, is in the form of
plates
pallets
pins
all of these
✅ The correct answer is option D.
IC Engines and Nuclear Power Plants MCQs
22. A moderator, apart from its high neutron slowing power, and low non-productive neutron, should be
stable under nuclear radiation
corrossion resistant
good thermal conductor
all of these
✅ The correct answer is option D.
23. The ignition quality of diesel oil is expressed by
cetane number
octane number
calorific value
none of these
✅ The correct answer is option A.
24. In a four stroke cycle petrol engine, , the compression
starts at 40° after bottom dead centre and ends at 30° before top dead centre
starts at 40° before bottom dead centre and ends at 30° after bottom dead centre
starts at bottom dead centre and ends at top dead centre
may start and end anyw
✅ The correct answer is option A.
25. The compression ratio in petrol engines is kept low as compared to diesel engines because higher compression ratio in petrol engines would lead to pre-ignition of fuel.
Agree
Disagree
✅ The correct answer is option A.
26. The colour of exhaust from diesel engine is generally
white
bluish
black
violent
✅ The correct answer is option C.
27. Which of the following statement is correct regarding petrol engines?
A fine fuel spray mixed with air is ignited by the heat of compression which is at a high pressure.
The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug.
The fuel is first evaporated after passing through a carburettor and is mixed with air before ignition.
all of the above
✅ The correct answer is option B.
28. In a four stroke cycle engine, the sequence of operations is
suction, compression, expansion and exhaust
suction, expansion, compression and exhaust
expansion, compression, suction and exhaust
compression, expansion
✅ The correct answer is option A.
29. In a four stroke engine, the working cycle is completed in
one revolution of the crankshaft
two revolutions of the crankshaft
three revolutions of the crankshaft
four revolutions of th
✅ The correct answer is option B.
30. The specific fuel consumption per B.P. hour for a diesel engine is about
0.2 kg
0.25 kg
0.3 kg
0.35 kg
✅ The correct answer is option A.