149) Iso-octane (C₈H₁₈) has octane number of

150) The brake power is always greater than indicated power.

151) An ignition coil in the spark ignition engines supplies __________ voltage to the spark plug.

152) The operation of forcing additional air under pressure into the engine cylinder is known as

153) The cylinder of a gas engine is made __________ than that of the petrol engine.