Consider the following statements for the air-standard efficiency of diesel cycle:
1. For the same compression ratio, the efficiency decreases with increasing cut-off ratios.
2. For the same compression ratio and same heat input, Diesel cycle is more efficient than Otto cycle.
3. For constant maximum pressure and constant heat input, Diesel cycle is more efficient than Otto cycle.
Which of the above statements are correct?1
1, 2 and 3
2
1 and 2 only
3
1 and 3 only
4
2 and 3 only