91. In petrol engines, using a fixed octane rating fuel, the increase in compression ratio will not effect the knocking tendency.
Agree
Disagree
✅ The correct answer is option B.
IC Engines and Nuclear Power Plants MCQs
92. The ignition of the charge by some hot surface within the engine before the passage of spark is called
pre-ignition
detonation
ignition delay
auto-ignition
✅ The correct answer is option A.
93. As compared to air standard cycle, in actual working, the effect of variation in specific heats is to
increase maximum pressure and maximum temperature
reduce maximum pressure and maximum temperature
increase maximum pressure and decrease maximum temperature
decrease maximum press
✅ The correct answer is option B.
94. Stoichiometric ratio is
chemically correct air-fuel ratio by weight
chemically correct air-fuel ratio by volume
actual air-fuel ratio for maximum efficiency
none of the above
✅ The correct answer is option B.
95. Diesel as compared to petrol is
highly ignitable
more difficult to ignite
less difficult to ignite
none of these
✅ The correct answer is option B.
96. The ratio of the heat equivalent to one kW hour to the heat in fuel per B.P. hour is termed as brake thermal efficiency.
Yes
No
✅ The correct answer is option A.
97. The ratio of the brake power to the indicated power is called
mechanical efficiency
overall efficiency
indicated thermal efficiency
volumetric efficiency
✅ The correct answer is option A.
98. A two stroke cycle engine occupies larger floor area than a four stroke cycle engine.
Yes
No
✅ The correct answer is option B.
99. The theoretically correct mixture of air and petrol is
10:01
15:01
20:01
25:01:00
✅ The correct answer is option B.
100. The engines in which the combustion of fuel takes place inside the engine cylinder are called internal combustion engines.
TRUE
FALSE
✅ The correct answer is option A.