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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
The thermodynamic difference between a Rankine cycle working with saturated steam and the Carnot cycle is that
A Carnot cycle can't work with saturated steam
B Heat is supplied to water at temperature below the maximum temperature of the cycle
C A Rankine cycle receives heat at two places
D Rankine cycle is hypothetical
Rankine cycle efficiency of a good steam power plant may be in the range of
A 15 to 20 per cent
B 35 to 45 per cent
C 70 to 80 per cent
D 90 to 95 per ceut
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
In Rankine cycle the work output from the turbine is given by
A change of internal energy between inlet and outlet
B change of enthaply between inlet and outlet
C change of entropy between inlet and outlet
D change of temperature between inlet and outlet
Rankine cycle comprises of two isothermal and two __________ processes.
A Isobaric
B Polytropic
C Isentropic
D None of these
What is the correct sequence for Rankine cycle?
A Pump-Boiler-Turbine-Condenser
B Turbine- Boiler-Pump-Condenser
C Pump-Turbine-Condenser-Boiler
D Boiler- Pump- Turbine- Condenser
Rankine efficiency of a steam power plant
A improves in summer as compared to that in winter
B improves in winter as compared to that in summer
C is unaffected by climatic conditions
D none of the above

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