Top 350+ Solved Heat Engines MCQ Questions Answer
Q. In jet engines the compression ratio
a. Varies with square of speed
b. Remains constant
c. Varies with altitude
d. Depends on other factors
e. Varies with altitude
Q. An Orsat's apparatus is used for
a. None of above
b. Gravimetric analysis of the flue gases
c. Volumetric analysis of the flue gas
d. Smoke density analysis of the flue gases
e. All of above
Q. Motoring test on I.C. engines is conducted to measure
a. I.H.P.
b. H.P.
c. Pumping horse power
d. Friction horse power
e. None of the above
Q. The turbidity in boiler feed water causes
a. Sludge
b. Scale
c. Corrosion
d. Embrittlement
e. None of the above
Q. Steam leaves the steam nozzle at
a. Low pressure and low velocity
b. Low pressure and high velocity
c. High pressure and low velocity
d. High pressure and high velocity
e. None of the above
Q. In diesel engines thermal efficiency may be expected in the range
a. 35 to 40 percent
b. 10 - 15 percent
c. 15 to 25 percent
d. 50 percent
e. 25 to 30 percent
Q. In reciprocating air compressor, the method of controlling the quantity of air delivered is done by
a. Clearance Control
b. Throttle Control
c. Blow-off Control
d. All of the above
e. Carbon dioxide
Q. Motor cycles generally have
a. Evaporative cooling system
b. Natural cooling engines
c. Ice cooled engines
d. Natural cooling engines
e. Air cooled engines
Q. Crankcase dilution is
a. Dilution of fuel in crank case
b. Dilution of lubricating oil in crankcase
c. Dilution of mixture while passing through crankcase in two stroke engines
d. Addition of water in crankcase
e. None of the above
Q. In an analysis report of a sample of coal the percentage of one of the constituents is specified as 3.5%. This constituent could be
a. Carbon
b. Ash
c. Moisture
d. Sulphur
e. Any of the above
Q. A plant costing Rs. 80,000 has a useful life of 12 years. The amount that should be saved annually to replace the equipment at the end of useful life with salvage value of Rs. 8,000 should be
a. Rs. 15000
b. Rs. 8000
c. Rs. 6000
d. Rs. 5000
e. Rs. 10000
Q. In a spark ignition engine supercharging
a. Decreases knocking tendency
b. There is no effect on knocking
c. Increases knocking tendency
d. Knocking is affected by other factors
e. 1000 hours
Q. A passout turbine generally operates on low pressure in the range
a. 10 - 20 kg/cm2
b. 100 - 150 kg/cm2
c. 20 - 50 kg/cm2
d. 150 - 300 kg/cm2
e. 50 - 100 kg/cm2
Q. In a reaction turbine while steam flows through the fixed blades
a. Velocity increases
b. Velocity decreases
c. Velocity increases while pressure drops
d. Pressure increases
e. Neither admission pressure nor cut off is varied
Q. For steam engine having a throttle governor, a straight line is obtained when the total weight of steam used per hour is plotted against the indicated horse power. This line is known as
a. Willian's line
b. Clapeyron's line
c. Bunsen line
d. Calender's line
e. Hopson's line