The knocking in spark ignition engines can be reduced by Both (A) and (B) None of these Retarding the spark Increasing the engine speed TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following does not relate to a spark ignition engine? Carburettor Fuel injector Ignition coil Spark plug TRUE ANSWER : ? YOUR ANSWER : ?
If one cylinder of a diesel engine receives more fuel than the others, then for that cylinder the Exhaust will be smoky Engine starts overheating Scavenging occurs Piston rings would stick into piston grooves TRUE ANSWER : ? YOUR ANSWER : ?
If Vâ‚ is the jet velocity and Vâ‚€ is the vehicle velocity, then the propulsive efficiency of a rocket is given by [2(Vâ‚€/Vâ‚)]/ [1 + (Vâ‚€/Vâ‚)²] (Vâ‚€/Vâ‚)/ [1 + (Vâ‚€/Vâ‚)²] Vâ‚€/(Vâ‚€ + Vâ‚) Vâ‚/(Vâ‚€ + Vâ‚) TRUE ANSWER : ? YOUR ANSWER : ?
The air-fuel ratio of the petrol engine is controlled by Injector Governor Fuel pump Carburettor TRUE ANSWER : ? YOUR ANSWER : ?
Compression ratio of I.C. Engines is Volume displaced by piston per stroke and clearance volume in cylinder Swept volume/cylinder volume Ratio of pressure after compression and before compression The ratio of volumes of air in cylinder before compression stroke and after compression stroke TRUE ANSWER : ? YOUR ANSWER : ?
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 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 Four stroke C.I. engine, four stroke S.I. engine, two stroke S.I. engine TRUE ANSWER : ? YOUR ANSWER : ?
In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure. Below None of these Above Equal to TRUE ANSWER : ? YOUR ANSWER : ?
The volumetric efficiency of a well designed engine may be 40 to 60% 30 to 40% 75 to 90% 60 to 70% TRUE ANSWER : ? YOUR ANSWER : ?
The knock in diesel engine occurs due to Delayed burning of the first part of the charge Reduction of delay period Instantaneous auto ignition of last part of charge Instantaneous and rapid burning of the first part of the charge TRUE ANSWER : ? YOUR ANSWER : ?