Top 350+ Solved Heat Engines MCQ Questions Answer
Q. If a water cooled compressor knocks during operation, the probable cause cannot be
a. Loose valve
b. Air filter choked
c. Too much clearance in crank pin
d. Excess cooling in intercooler
e. Loose flywheel or pulley
Q. Thermal efficiency of a compression ignition engine may be of the order of
a. 35%
b. 50%
c. 20%
d. 75%
e. 70%
Q. In centrifugal pumps suction head is
a. Vertical distance from supply level to pump centre line pump being level
b. (A) Above less suction friction heat
c. (A) Above less velocity heat
d. Any of the above
e. None of the above
Q. Maintenance requirements are least in case of
a. Electric locomotives
b. Carbon dioxide
c. Diesel locomotives
d. Steam locomotives
Q. The higher the temperature required to ignite diesel fuel,
a. Lower the octane number
b. Carbon dioxide
c. Lower the cetane number
d. Higher the cetane number
e. the higher the octane number
Q. In pumped storage systems, water is pumped
a. Upstream during peak load periods
b. Upstream during off peak periods
c. Upstream during off season
d. None of the above
e. None of the above
Q. The supercharging of diesel engine is done mainly to
a. Cool the engine
b. Increase the life of the engine
c. Increase the power output
d. Increase the speed
e. Reduce the cnoise from the engine
Q. In Eicher tractor the engine is
a. Air cooled
b. Horizontal
c. Multi-cylinder type
d. Low compression ratio petrol engine
e. Constant speed engine
Q. Air fuel ratio in a petrol engine fitted with dirty air cleaner as compared to that with clean air clearance will be
a. Not affected
b. Higher
c. Lower
d. Fluctuating
e. Depends on load
Q. Crankshafts are generally
a. Turned from bar stock
b. Die cast
c. Sand cast
d. Forged
e. Cold headed
Q. In a condensing steam engine
a. Exhaust steam is condensed in condenser
b. Exhaust steam is not recirculated
c. Steam condenses as soon as it leaves the cylinder
d. Condensed steam is supplied
e. Steam condenses inside cylinder
Q. The Apparatus used for the determination of calorific value of solid fuel is
a. Bunsen's apparatus
b. Photo calorimeter
c. Bomb calorimeter
d. Releigh apparatus
e. Osrat's apparatus
Q. Stuffing box is provided in
a. Condensing steam engines
b. Non-condensing steam engines
c. High speed steam engines
d. Single acting steam engines
e. Double acting steam engines
Q. An exciter is a
a. D.C. motor
b. D.C.generator
c. A.C.generator
d. Synchronous motor
e. None of the above