The specific fuel consumption per BHP hour for diesel engines is approximately:

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0.15kg

0.2kg

0.25kg

0.30kg

answer is B.

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Detailed Solution

Concept: Thrust-specific fuel consumption (TSFC) is an engine design's fuel efficiency with regard to thrust performance. TSFC can also be interpreted per unit of thrust as fuel consumption (grams per second) (kilonewtons). Thus it is thrust-specific, which means that the fuel intake is broken by the thrust.
TSFC is the mass of fuel burned in one hour by an engine separated by the thrust generated by the engine. Mass per time divided by force are the units of this performance factor (in English units, pounds mass per hour per pound; in metric units, kilograms per hour per Newton).
Through using extremely heated hot air to ignite the petrol rather than using a spark plug (compression ignition rather than spark ignition) , the diesel internal combustion engine differs from the gasoline-powered Otto cycle. Compressed air pressure vaporises fuel from the surface of the droplets.
By burning fuel pumped or sprayed into the compressed, hot air charge inside the cylinder, the diesel engine obtains its energy. It is necessary to heat the air to a degree higher than the temperature at which it will combust the injected fuel. The specific fuel consumption per BHP hour for diesel engines is approximately 0.2kg .
Hence, option 2 is correct.

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