Internal Combustion Engines
In a typical medium speed, 4-stroke cycle diesel engine

May start and end anywhere
Fuel injection starts at top dead center and ends at 20° after top dead center
Fuel injection starts at just before top dead center and ends just after top dead center
Fuel injection starts at 10° before top dead center and ends at 20° after top dead center

ANSWER DOWNLOAD EXAMIANS APP

Internal Combustion Engines
For the same compression ratio

Compression ratio has nothing to do with efficiency
Both Otto and Diesel cycles are, equally efficient
Otto cycle is more efficient than the Diesel
Diesel cycle is more efficient than Otto

ANSWER DOWNLOAD EXAMIANS APP