Top 350+ Solved Heat Engines MCQ Questions Answer
Q. Solid injection in diesel engines implies
a. Use of solid fuels
b. Supply of fuel in the form of solid
c. Injecting fuel with lubricating oil
d. Injecting fuel and air simultaneously
e. Injecting fuel without air
Q. Which fuel has maximum resistance to detonation
a. Alcohol
b. n-Heptane
c. Toulene
d. Iso-octane
e. Benzene
Q. The level of oil in engine cylinder should be checked when the engine is
a. Not running
b. Running
c. During starting
d. During cranking
e. None of the above
Q. The molecular weight of a mixture containing 20% oxygen, 20 percent nitrogen and 60 percent carbon dioxise on volume bases will be nearly
a. 38.4
b. Carbon dioxide
c. 41.4
d. 29.9
e. 33.3
Q. Dissociation is
a. Process of heat liberation in which no flame exist
b. Same is combustion
c. Combustion without heat
d. Slow combustion
e. Smokeless combustion
Q. Thermodynamic processes are those
a. Where a difference is observed in any macroscopic property of the system between different times or state
b. Where a difference is observed in any microscopic property of the system between different times or state
c. Which occurs in the direction of an intensive property or driving force contained within the system
d. Which require an agency outside the system to force the process
e. None of the above
Q. A Lungistrom turbine is a
a. Radial flow reaction turbine
b. Axial flow reaction turbine
c. Radial flow impulse turbine
d. Mixed flow impulse turbine
e. None of the above
Q. Highest useful compression ratio is the compression ratio at which
a. An engine can be safely operated
b. An engine gives maximum thermal efficiency
c. An engine operates smoothly
d. Detonation first becomes audible
e. None of the above
Q. The pour point of diesel fuel oil must be
a. More than the coldest atmospheric temperature at which oil is to be pumped
b. Less than 0?C
c. Less than the coldest atmospheric temperature of which oil is to be pumped
d. More than 100?C
e. More than 0?C
Q. The emission of carbon monoxide in automobile exhaust will be low when the vehicle is
a. Cruising at low speeds
b. Idling
c. Decelerating
d. Cruising at high speeds
e. Accelerating
Q. In a four stage compressor system first and third stage pressures are 1 and 9 kg/cm2 respectively. What will be the fourth stage delivery pressure
a. 243 kg/cm2
b. 81 kg/cm2
c. 3 kg/cm2
d. 27 kg/cm2
e. 9 kg/cm2
Q. In a lead cell battery the voltage per cell is
a. 6 volts
b. 1 volt
c. 1.5 volt
d. 2 volts
e. 1.1 volt
Q. Ignition quality of diesel fuel is expressed by
a. Octane number
b. Cetane number
c. Carbon percentage
d. Calorific value
e. None of the above
Q. The use of Wilson's line for flow calculation is associated with
a. Impulse turbines
b. Reaction turbines
c. Diesel engines
d. Steam-nozzles
e. Gas turbines
Q. Rateau turbine is a
a. Velocity compounded impulse turbine
b. Pressure compounded reaction turbine
c. Velocity compounded reaction turibine
d. Pressure compounded impulse turbine
e. Pressure-velocity compounded turbine