It the temperature of intake air in IC engines is lowered, then its efficiency will Decrease Increase up to certain limit and then decrease Increase Remain same TRUE ANSWER : ? YOUR ANSWER : ?
The minimum cranking speed in case of petrol engine is about 60 - 80 rpm One fourth of operating speed 250 - 300 rpm Half the operating speed TRUE ANSWER : ? YOUR ANSWER : ?
The mean effective pressure obtained from engine indicator indicates the Minimum pressure Maximum pressure developed Instantaneous pressure at any instant Average pressure TRUE ANSWER : ? YOUR ANSWER : ?
The ignition quality of petrol is expressed by All of these Calorific value Octane number Cetane number TRUE ANSWER : ? YOUR ANSWER : ?
For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of 0.75069444444444 0.50069444444444 0.62569444444444 0.37569444444444 TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is not an intern’s combustion engine? Steam turbine 2-stroke petrol engine 4-stroke petrol engine Diesel engine TRUE ANSWER : ? YOUR ANSWER : ?
The inlet value of a four stroke cycle I.C engine remains open for nearly 125° 180° 235° 200° TRUE ANSWER : ? YOUR ANSWER : ?
Number of working strokes per min. for a two stroke cycle engine is ____ the speed of the engine in r.p.m. Four-times Equal to Twice One-half TRUE ANSWER : ? YOUR ANSWER : ?
The turbine of the turboprop engine is ___ that of the turbojet engine. None of the listed here Bigger than Smaller than Same as TRUE ANSWER : ? YOUR ANSWER : ?
The air standard efficiency of an I.C. engine is given by (where r = Compression ratio, and γ = Ratio of specific heats) 1 - rγ - 1 1 + rγ - 1 1 - (1/rγ - 1) None of these TRUE ANSWER : ? YOUR ANSWER : ?