Internal Combustion Engines
The correct sequence of the decreasing order of brake thermal efficiency of the three given basic types of engines is

Four stroke S.I. engine, four stroke C.I. engine, two stroke S.I. engine
Four stroke C.I. engine, four stroke S.I. engine, two stroke S.I. engine
Two stroke S.I. engine, four stroke S.I. engine, four stroke C.I. engine
Four stroke C.I. engine, two stroke S.I. engine, four stroke S.I. engine

ANSWER DOWNLOAD EXAMIANS APP

Internal Combustion Engines
Scavenging air in diesel engine means

Forced air for cooling cylinder
Air used for combustion sent under pressure
Burnt air containing products of combustion
Air used for forcing burnt gases out of engine's cylinder during the exhaust period

ANSWER DOWNLOAD EXAMIANS APP