MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Automobile Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The angle in degrees moved by the crankshaft of a four cylinder engine between firing impulses is _________ |
| A. | 90 |
| B. | 180 |
| C. | 360 |
| D. | 720 |
| Answer» C. 360 | |
| 2. |
The pressure in an engine cylinder is less than atmospheric pressure when the engine is performing which stroke? |
| A. | Suction |
| B. | Compression |
| C. | Power |
| D. | Exhaust |
| Answer» B. Compression | |
| 3. |
A single cylinder four stroke engine is rotating at 2000 rpm. The number of power strokes occuring in one minute is ________ |
| A. | 500 |
| B. | 1000 |
| C. | 2000 |
| D. | 4000 |
| Answer» C. 2000 | |
| 4. |
The fuel is injected into the cylinder in diesel engine when the piston is ____________ |
| A. | Exactly at TDC after compression stroke |
| B. | Exactly at the BDC before compression stroke |
| C. | Approaching TDC during compression stroke |
| D. | Approaching TDC during exhaust stroke |
| Answer» D. Approaching TDC during exhaust stroke | |
| 5. |
In a diesel engine the temperature of gases under full load may be of the order of __________ |
| A. | 550-650 degree Celsius |
| B. | 200-300 degree Celsius |
| C. | 150-200 degree Celsius |
| D. | 100 degree Celsius |
| Answer» B. 200-300 degree Celsius | |
| 6. |
In a diesel engine the pressure during combustion may increase to a range at _________ |
| A. | 10-15 atm |
| B. | 15-20 atm |
| C. | 20-30 atm |
| D. | 55-75 atm |
| Answer» E. | |
| 7. |
In S.I engine the intake valve closes __________ |
| A. | At BDC |
| B. | At TDC |
| C. | 25 degree to 84 degree after BDC |
| D. | 10 degree to 20 degree before TDC |
| Answer» D. 10 degree to 20 degree before TDC | |
| 8. |
In a four stroke S.I engine the exhaust valve usually opens ______ |
| A. | At BDC |
| B. | 35 degree to 60 degree before BDC |
| C. | 35 degree to 60 degree after BDC |
| D. | 10 degree to 20 degree before BDC |
| Answer» C. 35 degree to 60 degree after BDC | |
| 9. |
In internal combustion engine the approximate percentage of the combustion heat that passes to the cylinder walls is _________ |
| A. | 5% |
| B. | 10% |
| C. | 30% |
| D. | 60% |
| Answer» D. 60% | |
| 10. |
Ignition advance is expressed in terms of _________ |
| A. | Crank angle |
| B. | Millimetres of piston travel before TDC |
| C. | Time in milli seconds |
| D. | All of the mentioned |
| Answer» E. | |
| 11. |
In four cylinder engines the ignition advance depends on _________ |
| A. | Quality of fuel |
| B. | Engine speed |
| C. | Cylinder dimensions |
| D. | Quality of fuel and engine speed |
| Answer» E. | |
| 12. |
In case of four cylinder inline engine the number of firing strokes in one revolution of crank is _______ |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 13. |
In case of four cylinder opposed cylinder engines the firing order is ___________ |
| A. | 1-4-3-2 |
| B. | 1-3-4-2 |
| C. | 1-2-3-4 |
| D. | 1-2-4-3 |
| Answer» B. 1-3-4-2 | |
| 14. |
The firing order in case of four cylinder inline engines is usually ________ |
| A. | 1-2-4-3 |
| B. | 1-3-4-2 |
| C. | 1-4-3-2 |
| D. | Either 1-3-4-2 or 1-4-3-2 |
| Answer» E. | |
| 15. |
In an automobile engine the temperature of the piston will be more at __________ |
| A. | The crown of the piston |
| B. | The skirt of the piston |
| C. | The piston walls |
| D. | The piston rings |
| Answer» B. The skirt of the piston | |