Internal Combustion Engines
If V₁ is the jet velocity and V₀ is the vehicle velocity, then propulsive efficiency of a turbojet engine is

2V₀ / (V₀ + V₁)
V₀ / (V₀ + V₁)
V₁ / (V₀ + V₁)
2V₁ / (V₀ + V₁)

ANSWER DOWNLOAD EXAMIANS APP

Internal Combustion Engines
In a four stroke cycle petrol engine, the compression

Starts at 40° after bottom dead centre and ends at 30° before top dead centre
Starts at bottom dead centre and ends at top dead centre
May start and end anywhere
Starts at 40° before bottom dead centre and ends at 30° after bottom dead centre

ANSWER DOWNLOAD EXAMIANS APP