In the crankcase method of scavenging, the air pressure is produced by Natural aspirator Supercharger Centrifugal pump Movement of engine piston TRUE ANSWER : ? YOUR ANSWER : ?
When a body, floating in a liquid, is given a small angular displacement, it starts oscillating about a point known as Centre of buoyancy Centre of pressure Centre of gravity Metacentre TRUE ANSWER : ? YOUR ANSWER : ?
If the speed of the engine is increased, the indicated power will Remain same None of these Decrease Increase TRUE ANSWER : ? YOUR ANSWER : ?
When crude oil is heated, then which of the following hydrocarbon is given off first? Gasoline Natural gas Paraffin Kerosene TRUE ANSWER : ? YOUR ANSWER : ?
The ratio of the indicated thermal efficiency to the air standard efficiency is known as Volumetric efficiency Overall efficiency Relative efficiency Mechanical efficiency TRUE ANSWER : ? YOUR ANSWER : ?
The increase of efficiency of a compression ignition engine, as the load decreases, is due to Hit and miss governing Qualitative governing Higher maximum temperature Quantitative governing TRUE ANSWER : ? YOUR ANSWER : ?
Compression ratio of I.C. Engines is Swept volume/cylinder volume Volume displaced by piston per stroke and clearance volume in cylinder The ratio of volumes of air in cylinder before compression stroke and after compression stroke Ratio of pressure after compression and before compression TRUE ANSWER : ? YOUR ANSWER : ?
A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of 75% normal heptane and 25% iso-octane 75% iso-octane and 25% normal heptane 75% petrol and 25% diesel 75% diesel and 25% petrol TRUE ANSWER : ? YOUR ANSWER : ?
The fuel valve in a four stroke cycle diesel engine Opens at top dead center and closes at bottom dead center Opens at 15° before top dead center and closes at 20° after top dead center May open and close anywhere Opens at 15° after top dead center and closes at 20° before bottom dead center TRUE ANSWER : ? YOUR ANSWER : ?
The frictional power (F.P.) is given by F.P. = F.P. = F.P. = I.P. - P. F.P. = I.P./ P./I.P. P. - I.P. P. TRUE ANSWER : ? YOUR ANSWER : ?