Does the supply of scavenging air at a density greater than that of atmosphere mean engine is supercharged ?

A. Yes
B. No
C. To some extent
D. Unpredictable

The air standard efficiency of an Otto cycle compared to diesel cycle for the given compression ratio is__________________?

A. Same
B. Less
C. More
D. More or less depending on power rating

In a diesel engine, the fuel is ignited by___________________?

A. Spark
B. Injected fuel
C. Heat resulting from compressing air that is supplied for combustion
D. Ignition

The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called__________________?

A. Net efficiency
B. Efficiency ratio
C. Relative efficiency
D. Overall efficiency

If the intake air temperature of I.C. engine increases, its efficiency will_________________?

A. Increase
B. Decrease
C. Remain same
D. Unpredictable

An engine indicator is used to determine the following___________________?

A. Speed
B. Temperature
C. Volume of cylinder
D. M.e.p. and i.h.p.

In a typical medium speed 4-stroke cycle diesel engine the inlet valve_____________________?

A. Opens at 20° before top dead center and closes at 35° after the bottom dead center
B. Opens at top dead center and closes at bottom dead center
C. Opens at 10° after top dead center and closes 20° before the bottom dead center
D. May open or close anywhere

The pressure at the end of compression in the case of diesel engine is of the order of___________________?

A. 6 kg/cm
B. 12kg/cmz
C. 20 kg/cmz
D. 27.5 kg/cmz

If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the %age increase in efficiency will be________________?

A. 2%
B. 4%
C. 8%
D. 14%

The thermal efficiecny of a diesel cycle having fixed compression ratio, with increase in cut-off ratio will___________________?

A. Increase
B. Decrease
C. Be independent
D. May increase or decrease depending on other factors