The size of a reactor at which the chain reaction can be initiated (i.e. when system becomes critical) with just enough fissionable material (called critical mass of fuel) is known as critical size of reactor.

In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have

The indicated power for multi-cylinder engine will be same as that of a single cylinder engine.

The reflectivity depends upon

The increase in intake temperature of internal combustion engines will __________ efficiency.