Which of the following medium is compressed in a Diesel engine cylinder __________________?

A. Air aione
B. Air and fuel
C. Air and lub oil
D. Fuel alone

Most high speed compression engines operate on __________________?

A. Diesel cycle
B. Otto cycle
C. Dual combustion cycle
D. Special type of air cycle

As a result of detonation in an I.C. engine, following parameter attains very high value _____________________?

A. Peak pressure
B. Rate of rise of pressure
C. Rate of rise of temperature
D. Peak temperature

For the same compression ratio_____________________?

A. Otto cycle is more efficient than the diesel
B. Diesel cycle is more efficient’than otto
C. Both otto and diesel cycles are, equally efficient
D. Compression ratio has nothing to do with efficiency

It the temperature of intake air in IC engines is lowered, then its efficiency will_______________________?

A. Increase
B. Decrease
C. Remain same
D. Increase upto certain limit and then decrease

If one cylinder of a diesel engine receives more fuel than the others, then for that cylinder the________________?

A. exhaust will be smoky
B. piston rings would stick into piston grooves
C. exhaust temperature will be high
D. engine starts overheating

The inlet value of a four stroke cycle I.C engine remains open for nearly___________________?

A. 180°
B. 125°
C. 235°
D. 200°

The specific fuel consumption per BH hour for a petrol engine is approximately__________________?

A. 0.15 kg
B. 0.2 kg
C. 0.25 kg
D. 0.3kg

Crankcase explosion in I.C. engines usuall occurs as ___________________?

A. First a mild explosion followed by a bi explosion
B. First a big explosion followed by a mil explosion
C. Both mild and big explosions occi simultaneously
D. Never occurs

The fuel in diesel engine is normally injected at pressure of_________________?

A. 5-10 kg/cm2
B. 20-25 kg/cm2
C. 60-80 kg/cm2
D. 90-130 kg/cm2