MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Ic Engine knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Energy released in actual cycle is about _____________ of the fuel input. |
| A. | 90% |
| B. | 70% |
| C. | 50% |
| D. | 25% |
| Answer» B. 70% | |
| 2. |
In petrol engine the actual pressure developed compared to the predicted maximum pressure is? |
| A. | 90% |
| B. | 70% |
| C. | 50% |
| D. | 25% |
| Answer» D. 25% | |
| 3. |
The volumetric efficiency is affected by ____________ |
| A. | the exhaust gas in the clearance volume |
| B. | the design of intake and exhaust valve |
| C. | valve timing |
| D. | all of the mentioned |
| Answer» E. | |
| 4. |
In an actual S.I engine the pumping loss with respect to speed ____________ |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | none of the mentioned |
| Answer» C. remains same | |
| 5. |
What is the major loss in a C.I. engine? |
| A. | direct heat loss |
| B. | loss due to incomplete combustion |
| C. | rubbing friction loss |
| D. | pumping loss |
| Answer» C. rubbing friction loss | |
| 6. |
The major loss in a S.I. engine is due to ____________ |
| A. | exhaust blow down |
| B. | pumping |
| C. | incomplete combustion |
| D. | variation in specific heat and chemical equilibrium |
| Answer» E. | |
| 7. |
Optimum spark timing gives ____________ |
| A. | higher mean effective pressure |
| B. | higher efficiency |
| C. | higher mean effective pressure and higher efficiency |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 8. |
When the spark is advanced, the work output is less as ____________ |
| A. | the peak pressure is low |
| B. | the peak temperature is low |
| C. | additional work is required to compress the burning gas |
| D. | frictional losses increase |
| Answer» D. frictional losses increase | |
| 9. |
If the spark timing is at TDC, the work is ____________ |
| A. | more |
| B. | less |
| C. | equal |
| D. | none of the mentioned |
| Answer» C. equal | |
| 10. |
Time loss factor in Actual Cycle is due to ____________ |
| A. | progressive combustion |
| B. | heat loss through cylinder walls |
| C. | gas leakage |
| D. | friction |
| Answer» B. heat loss through cylinder walls | |