PrepBharat

1. The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be ___________
a) 25%
b) 50%
c) 70%
d) 100%

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2.The efficiency of an Otto cycle is increased by increasing ___________
a) pressure ratio
b) compression ratio
c) temperature ratio
d) none of the mentioned

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3. The Otto cycle consists of __________
a) two constant pressure processes and two constant volume processes
b) two constant pressure and two constant entropy processes
c) two constant volume processes and two constant entropy processes
d) none of the mentioned

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4. The thermal efficiency of theoretical Otto cycle ___________
a) decreases with increase in compression ratio
b) increases with decrease in compression ratio
c) does not depends upon the pressure ratio
d) none of the mentioned

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5. What is the work output of the theoretical Otto cycle?
a) increases with increase in compression ratio
b) increases with increase in pressure ratio
c) increases with increase in compression & pressure ratio
d) none of the mentioned

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6. The mean effective pressure of an Otto Cycle increases with an increase in __________
a) pressure ratio
b) compression ratio
c) temperature ratio
d) none of the mentioned

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7. In Otto cycle, heat addition takes place at __________
a) constant temperature
b) constant pressure
c) constant volume
d) none of the mentioned

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8. If compression ratio of an engine working on Otto cycle is increased from 5 to 6, its air standard efficiency will increase by ________
a) 1%
b) 20%
c) 16.67%
d) 8%

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9. If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the percentage increase in efficiency will be _______
a) 2%
b) 4%
c) 8%
d) 14%

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10. The constant volume cycle is also called __________
a) Carnot cycle
b) Joule cycle
c) Diesel cycle
d) Otto cycle

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