281. Supercharging is the process of
A.Supplying The Intake Of An Engine With Air At A Density Greater Than The Density Of The Surrounding Atmosphere
B.Providing Forced Cooling Air
C.Injecting Excess Fuel For Raising More Load
D.Supplying Compressed Air To Remove Combustion Products Fully

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282. 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

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283. The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called
A.Net Efficiency
B.Efficiency Ratio
C.Relative Efficiency
D.Overall Efficiency

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284. Compression ratio of LC. engines is
A.The Ratio Of Volumes Of Air In Cylinder Before Compression Stroke And After Compression Stroke
B.Volume Displaced By Piston Per Stroke And Clearance Volume In Cylinder
C.Ratio Of Pressure After Compression And Before Compression
D.Swept Volume/Cylinder Volume

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285. The air standard efficiency of an Otto cycle compared to diesel cycle for the given compression ratio is
A.Same
B.Less
C.More
D.More Or Less Depending On Power Rating

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286. The calorific value of gaseous fuels is expressed in terms of
A.Kcal
B.Kcal/Kg
C.Kcal/m2
D.Kcal/m2

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287. If the intake air temperature of I.C. engine increases, its efficiency will
A.Increase
B.Decrease
C.Remain Same
D.Unpredictable

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