engineering recuitment ISRO Scientist Mechanical Mock Test Internal Combustion Engine Fuels and Combustion
Which of the following remarks pertaining to supercharging of IC engines are correct?
1. Ideal supercharging increases the output, but decreases the thermal efficiency slightly
2. The indicated mean effective pressure and mechanical efficiency increase with supercharging
3. The permissible amount of supercharging depends on the compression ratio, air-fuel mixture and design of engine
4. Engine friction losses increase with supercharging
1
1, 2, 3 and 4
2
1, 2 and 3 only
3
1, 2 and 4 only
4
2, 3 and 4 only