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.Management Sciences
Category: I.C. Engines
Power impulses from an I.C. engine are somoothed out by__________________?
A. governor
B. crank shaft
C. gear box
D. flywheel
E. timing spark properly
The function of a fuel pump in a petrol pump is to______________________?
A. inject fuel in cylinder
B. supply fuel when carburettor fails
C. pump fuel so that it reaches carburettor (to improve thermal efficiency)
D. does not exist
The specific fuel consumption per BHP hour for diesel engine is approximately___________________?
A. 0.15 kg
B. 0.2 kg
C. 0.25 kg
D. 0.3 kg
E. 0.35 kg
The ignition coil in diesel engines produces voltage of the order of________________?
A. 6 to 12 volts
B. 240 volts
C. 1000 volts
D. 20,000 volts
E. 80,000 volts
The pressure and temperature at the end of compression stroke in a petrol engine are of the order of___________________?
A. 4 – 6 kg/cm2 and 200 – 250°C
B. 6 – 12 kg/cm2 and 250 – 350°C
C. 12 – 20 kg/cm2 and 350 – 450°C
D. 20 – 30 kg/cm2 and 450 – 500°C
E. 30 – 40 kg/cm2 and 500 – 700°C
High carbon content in diesel oil used for diesel engine leads to_________________?
A. production of highly corrosive gases corroding the cylinder walls and exhaust system
B. excessive engine wear
C. damaging of both the storage tank and the engine
D. deposition on engine parts
E. none of the above.
In loop scavenging, the top of the piston is________________?
A. flat
B. contoured
C. slanted
D. depressed
E. convex shaped
Does the supply of scavenging air at a density greater than that of atmosphere mean engine is supercharged ?
A. yes
B. no
C. to some extent
D. unpredictable
E. depends on other factors
The delay period in petrol engine is of the order of__________________?
A. 0.001 sec
B. 0.002 see
C. 0.01 sec
D. 0.05 sec
E. 0.1 sec
The self-ignition temperature of diesel oil compared to petrol is_________________?
A. higher
B. lower
C. same
D. depends on quality of fuel
E. unpredictable
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