IC Engine Practice Test 1

1. If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the percentage increase in efficiency will be ___________

2. The major loss in a S.I. engine is due to ____________

3. The isothermal process of a carnot cycle needs very __________ motion of the piston to maintain constant temperature.

4. The thermal efficiency of petrol and gas engines is about ___________

5. Dual Cycle is a combination of ____________

6. A carnot heat pump is used to heat a house. The outside temperature is -3ºC and the indoor temperature is 27ºC. If the heat loss from the house is 40kW, the power required to operate the heat pump is?

7. Time loss factor in Actual Cycle is due to ____________

8. For a compressor process with variable specific heat the peak temperature and pressure are ____________

9. The following volume of air is required for consuming 1 litre of fuel by a four stroke engine is?

10. For a given temperature T₁, as the difference between T₁ and T₂ increases, the COP of a carnot heat pump ___________