The efficiency of Diesel cycle depends upon

Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle

A

Heat rejection is lower

B

Expansion and compression are isentropic

C

Combustion is at constant volume

D

Maximum temperature is higher

When cut-off ratio is __________ the efficiency of Diesel cycle approaches to Otto cycle efficiency.

A

Zero

B

$$\frac{1}{5}$$

C

$$\frac{4}{5}$$

D

1

When cut-off ratio is ________; the efficiency of Diesel cycle approaches to Otto cycle efficiency

A

$$\frac{1}{4}$$

B

Zero

C

$$\frac{1}{5}$$

D

2

The efficiency of Diesel cycle approaches to Otto cycle efficiency when

A

Cut-off is decreased

B

Cut-off is constant

C

Cut-off is increased

D

Cut-off is zero

The efficiency of the dual combustion cycle for the same compression ratio is __________ Diesel cycle.

A

Greater than

B

Less than

C

Equal to

D

None of these

For the same compression ratio, the efficiency of Diesel cycle is __________ Otto cycle.

A

Greater than

B

Less than

C

Equal to

D

None of these

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

Carnot cycle efficiency depends upon

A

Properties of the medium/substance used

B

Condition of engine

C

Working condition

D

Temperature range of operation

Efficiency of a heat engine working on Carnot cycle between two temperature levels depends upon the

A

Two temperatures only

B

Pressure of working fluid

C

Mass of the working fluid

D

Mass and pressure both of the working fluid

Air standard Otto cycle is more efficient than the diesel cycle for the same

A

Heat addition & compression ratio

B

Heat addition & pressure

C

Compression ratio & pressure

D

Cylinder dimension & rpm

The efficiency of Diesel cycle depends upon

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