question_answer

Consider the following statements:

1. Volumetric efficiency of diesel engines is higher than that of SI engines

2. When a SI engine is throttled; its mechanical efficiency decreases.

3. Specific fuel consumption increases as the power capacity of the engine increases.

4. Inspite of higher compression ratios, the exhaust temperature in diesel engines is much lower than that in SI engines.

Of these statements:

A) 1, 2, 3 and 4 are correct

B) 1, 2 and 3 are correct

C) 3 and 4 are correct   

D) 1, 2 and 4 are correct