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Question

Thermal efficiency of otto cycle can be represented by \({\eta _{otto}} = 1 - \frac{{{T_a}}}{{{T_b}}}\). Which of the following statement is correct for state point a and b?

The correct answer is

Constant volume heat addition process will start from ‘b’

For the standard air Otto cycle, \(\eta=1-T_1/T_2\), where 1 is compression start and 2 is compression end. Identifying a=1 and b=2, constant-volume heat addition is process 2→3 and therefore starts at b.

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Important Questions from Otto Cycle

  1. A petrol engine theoretically operates on

  2. In an Otto cycle, how does heat addition take place?

  3. Otto cycle is also known as

  4. The efficiency of diesel cycle approaches to Otto cycle efficiency when

  5. In an Otto cycle, the compression ratio is 9 : 1 and the pressure and temperature at the beginning of the compression process are 100 kPa and 10°C. The heat addition by combustion gives the highest temperature as 2500 K.Thermal efficiency of the cycle is:

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