130) The injection of fuel by external source is not required in case of engines working on Otto cycle.

131) The running cost of a petrol engine is __________ than that of a diesel engine.

132) In a petrol engine, if diesel is used, then the engine will

133) Number of working strokes per min. for a four stroke cycle engine are __________ the speed of the engine in r.p.m.

134) The air standard efficiency of an I.C. engine depends on