MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 10 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. |
In two-stroke cycle engines, what replaces valves of a four-stroke engine? |
| A. | Fins |
| B. | Notches |
| C. | Ports |
| D. | Tubes |
| Answer» D. Tubes | |
| 2. |
The expansion process in diesel engine is ________ |
| A. | Isothermal |
| B. | Adiabatic |
| C. | Isobaric |
| D. | None of the mentioned |
| Answer» C. Isobaric | |
| 3. |
Higher efficiency in Otto cycle can be achieved by _______ |
| A. | Increasing the compression ratio |
| B. | Decreasing the compression ratio |
| C. | Keeping the compression ratio constant |
| D. | Efficiency does not depend on compression ratio |
| Answer» B. Decreasing the compression ratio | |
| 4. |
Which of these is not an assumption made in deriving the formula for air standard of Otto cycle? |
| A. | There is no heat loss during the cycle |
| B. | The compression and expansion are isothermal |
| C. | The heating and cooling strictly take place at constant volume |
| D. | The suction and exhaust take place at atmospheric pressure |
| Answer» C. The heating and cooling strictly take place at constant volume | |
| 5. |
The valves of an ic engine are made to open and close slowly to _________ |
| A. | Increase the engine efficiency |
| B. | Decrease the fuel consumption |
| C. | Allow engine to cool in the meantime |
| D. | Provide silent operation under high speed conditions |
| Answer» E. | |
| 6. |
In a 4-stroke ic engine, which of the strokes is considered as working or power stroke? |
| A. | Suction stroke |
| B. | Compression stroke |
| C. | Expansion stroke |
| D. | Exhaust stroke |
| Answer» D. Exhaust stroke | |
| 7. |
In a four stroke ic engine, how many strokes are covered for one complete crankshaft revolution? |
| A. | 4 |
| B. | 2 |
| C. | 1 |
| D. | 0.5 |
| Answer» C. 1 | |
| 8. |
Heat rejection in diesel cycle is at _________ |
| A. | Constant pressure |
| B. | Constant volume |
| C. | Constant temperature |
| D. | None of the mentioned |
| Answer» C. Constant temperature | |
| 9. |
In a Diesel cycle engine, combustion occurs at _________ |
| A. | Constant pressure |
| B. | Constant temperature |
| C. | Constant volume |
| D. | Constant heat |
| Answer» B. Constant temperature | |
| 10. |
In a Otto cycle engine, combustion occurs at __________ |
| A. | Constant pressure |
| B. | Constant temperature |
| C. | Constant volume |
| D. | Constant heat |
| Answer» D. Constant heat | |