The octane number of petrol, generally available, is 80 to 100 40 to 60 20 to 40 60 to 80 TRUE ANSWER : ? YOUR ANSWER : ?
The firing order in an I.C. engine depends upon Design of crankshaft Number of cylinders All of these Arrangement of the cylinders TRUE ANSWER : ? YOUR ANSWER : ?
Most high speed compression engines operate on Special type of air cycle Dual combustion cycle Diesel cycle Otto cycle TRUE ANSWER : ? YOUR ANSWER : ?
A fuel of cetane number 40 has the same ignition quality as a mixture of 40% petrol and 60% diesel 40% diesel and 60% petrol 40% cetane and 60% alpha methyl naphthalene 40% alpha methyl naphthalene and 60% cetane TRUE ANSWER : ? YOUR ANSWER : ?
Which one of the following engines will have heavier flywheel than the remaining ones? 30 kW four-stroke diesel engine running at 750 r.p.m. 30 kW two-stroke petrol engine running at 1500 r.p.m. 30 kW two-stroke diesel engine running at 750 r.p.m. 30 kW four-stroke petrol engine running at 1500 r.p.m. TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following statement is correct regarding normal cetane? It is a standard fuel used for knock rating of diesel engines It has long carbon chain structure Its chemical name is normal hexadecane All of these TRUE ANSWER : ? YOUR ANSWER : ?
If Vâ‚ is the jet velocity and Vâ‚€ is the vehicle velocity, then propulsive efficiency of a turbojet engine is Vâ‚ / (Vâ‚€ + Vâ‚) 2Vâ‚ / (Vâ‚€ + Vâ‚) 2Vâ‚€ / (Vâ‚€ + Vâ‚) Vâ‚€ / (Vâ‚€ + Vâ‚) TRUE ANSWER : ? YOUR ANSWER : ?
The fuel in diesel engine is normally injected at pressure of 60-80 kg/cm² 5-10 kg/cm² 90-130 kg/cm² 20-25 kg/cm² TRUE ANSWER : ? YOUR ANSWER : ?
The air requirement of a petrol engine during starting compared to theoretical air required for complete combustion is More Same May be more or less depending on engine capacity Less TRUE ANSWER : ? YOUR ANSWER : ?
The compensating jet in a carburettor supplies almost constant amount of petrol at all speeds because the Jet area is automatically varied depending on the suction The flow from the main jet is diverted to the compensating jet with increase in speed The diameter of the jet is constant and the discharge coefficient is invariant Flow is produced due to the static head in the float chamber TRUE ANSWER : ? YOUR ANSWER : ?