Top 350+ Solved Heat Engines MCQ Questions Answer
Q. The value of reheat factor in case of steam turbines is usually
a. 1.25 to 1.50
b. 1.02 to 1.06
c. 1.10 to 1.16
d. 1.75 to 2.50
e. 0.9 to 0.99
Q. A fuel of octane rating 85 matches the antiknock qualities of mixture consisting of
a. 85% heptane + 15% octane
b. 85% octane + 15% heptane
c. 85% petrol + 15% diesel
d. 85% benzene + 15% methyl alcohol
e. 15% petrol + 85% diesel
Q. A Wankel engine combines the advantages of
a. SI and CI engines
b. Carburction and fuel injection
c. Air cooled and reciprocating engines
d. Rotory and reciprocating engines
e. Axial flow and centrifugal compression
Q. Willian's line is relevant to
a. Throttle controlled trbine
b. Nozzle controlled turbines
c. Impulse turbines
d. Reaction turbines
e. None of the above
Q. Starting motor in automobiles is generally
a. Induction motor
b. Synchronous motor
c. Squirrel cage motor
d. Shunt motor
e. Series motor
Q. Three states of matter are distinguished with repect to molecules by
a. Characteristics of the motion of molecules
b. The number
c. Energy of molecules
d. The atoms in molecules
e. The orientation of molecules
Q. Tenacity is the property of materials in which they
a. Resist indentation
b. Resist rupture
c. Resist shearing
d. Resist deformation
e. None of the above
Q. The horse power of engine for a ship is of the order to
a. 10,000 to 40,000
b. 50 to 100
c. 1000 to 5000
d. 100 to 500
e. 500 to 1000
Q. As the steam flows in a subsonic nozzle, in which the cross-section is decreasing in the direction of flow
a. The velocity will decrease in the direction of flow
b. The pressure will increase in the direction of flow
c. The velocity will decrease while pressure will decrease in the direction of flow
d. The velocity will increase while pressure will decrease in the direction of flow
e. None of the above
Q. White smoke from a diesel engine can be expected during
a. Start up or idling
b. High speed operation
c. High load operation
d. All of the above
e. None of the above
Q. Total sulphur content in a diesel fuel oil must not exceed
a. 0.10%
b. 0.01%
c. 0.05%
d. 0.50%
e. 1%
Q. Air consumption of a four-stroke diesel engine per rated BHP/hr will be
a. 20 kg
b. 1 kg
c. 5 - 7 kg
d. 10 - 14 kg
e. 15 kg
Q. In spark ignition engines the knocking tendency decreases
a. As compression ratio is reduced
b. By controlling air/fuel mixture
c. By controlling ignition timing
d. By controlling exhaust temperatures
e. None of the above
Q. Water and sediments in a diesel fuel oil must not exceed.
a. 0.50%
b. 0.01%
c. 1%
d. 0.10%
e. 0.05%
Q. Rankine cycle efficiency for fixed steam temperature of any volume upto critical temperature will be maximum for steam pressure of
a. 250 kg/cm2
b. 100 kg/cm2
c. 200 kg/cm2
d. Critical pressure
e. 203.5 kg/cm2