An engine has a normal speed of 960 r.p.m. and no load speed of 1000 r.p.m. The speed droop of governor will be about___________________?

A. 2%
B. 4%
C. 8%
D. ±4%

If diesel is fed by mistake in the oil tank of a petrol engien, then engine will________________?

A. Give lot of smoke
B. Detonate
C. Knock
D. Not run

For the same size and weight, a two stroke engine as compared to four stroke engine will generate power_________________?

A. About twice
B. About 0.5 times
C. Nearly equal
D. About 1.7 times

For low load operation, more suitable (economical) engine is_______________?

A. S.i. engine
B. C.i. engine
C. Both are equally good
D. Multicylinder engine

Hot air standard diesel cycle efficiency with increase in value of C„_______________?

A. Increases
B. Decreases
C. Remains unaffected
D. Depends on other factors

In open combustion chamber in diesel engines____________________?

A. The shape and layout of the piston crown, the inlet port, and the valve produce the turbulent effect on fuel mixture
B. Fuel is injected into an auxiliary chamber that is separated from the cylinder by an orifice or throat
C. Only a part of air charge is contained in an auxiliary chamber in which the fuel starts to burn with insufficient air which due to explosion tendency mixes thoroughly into main cylinder charge
D. Fuel is injected at atmospheric pres¬sure

Which of the following engines can work on very lean mixture__________________?

A. S.i. engine
B. C.i. engine
C. Two stroke engine
D. Four stroke engine

Theoretically, the following engine should have maximum efficiency________________?

A. gas engine
B. 2-stroke s.i. engine
C. 4-stroke s.i. engine
D. steam engine

In petrol engine using a fixed octane rating fuel and fixed compression ratio, super charging will_________________?

A. Increase the knocking tendency
B. Decrease the knocking tendency
C. Not affect the knocking tendency
D. Increase or decrease knocking tendency depending on strength and time of spark

The thermal efficiency of a diesel engine is of the order of_________________?

A. 92%
B. 68%
C. 52%
D. 34%