MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Thermodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is a classification of reciprocating engines? |
| A. | spark-ignition engines |
| B. | compression-ignition engines |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 2. |
The compression ratio is a pressure ratio. |
| A. | true |
| B. | false |
| Answer» C. | |
| 3. |
The net work produced during a cycle is given bya) (mean effective pressure)*(piston are |
| A. | (mean effective pressure)*(piston area)*(stroke) |
| B. | (mean effective pressure)*(displacement volume) |
| C. | both of the mentioned |
| D. | none of the mentioned |
| E. | *(piston area)*(stroke)b) (mean effective pressure)*(displacement volume)c) both of the mentionedd) none of the mentioned |
| Answer» D. none of the mentioned | |
| 4. |
THE_COMPRESSION_RATIO_IS_A_PRESSURE_RATIO.?$ |
| A. | true |
| B. | false |
| Answer» C. | |
| 5. |
Which of the following statement is true?$ |
| A. | in S.I. engines, combustion of air-fuel mixture is initiated by spark plug |
| B. | in C.I. engines, combustion of air-fuel mixture is self-ignited |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 6. |
Which_of_the_following_is_a_classification_of_reciprocating_engines?$ |
| A. | spark-ignition engines |
| B. | compression-ignition engines |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 7. |
A gasoline engine has a volumetric compression ratio of 10. Find the overall cycle efficiency. |
| A. | 0.602 |
| B. | 0.302 |
| C. | 0.502 |
| D. | 0.702 |
| Answer» B. 0.302 | |
| 8. |
The net work produced during a cycle is given b? |
| A. | (mean effective pressure)*(piston area)*(stroke) |
| B. | (mean effective pressure)*(displacement volume) |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 9. |
The compression ratio is given by |
| A. | Vmax / total volume |
| B. | Vmin / Vmax |
| C. | V(at TDC) / V(at BDC) |
| D. | V(at BDC) / V(at TDC) |
| Answer» E. | |
| 10. |
The volume displaced by piston when it moves between TDC and BDC is called |
| A. | swept volume |
| B. | displacement volume |
| C. | clearance volume |
| D. | none of the mentioned |
| Answer» C. clearance volume | |
| 11. |
The clearance volume is the ____ volume formed in cylinder when piston is at TDC. |
| A. | minimum |
| B. | maximum |
| C. | average |
| D. | none of the mentioned |
| Answer» B. maximum | |
| 12. |
The air or air-fuel mixture is ____ into cylinder through intake valve and ____ out of cylinder through exhaust valve. |
| A. | drawn, expelled |
| B. | taken, thrown |
| C. | both of the mentioned |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 13. |
The diameter of piston is called ____ |
| A. | piston |
| B. | bore |
| C. | stroke |
| D. | none of the mentioned |
| Answer» C. stroke | |
| 14. |
The distance between TDC and BDC is called ____ |
| A. | piston |
| B. | bore |
| C. | stroke |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 15. |
The top dead centre is the position of piston when it forms ____ volume in cylinder and bottom dead centre is the position of piston when it forms ____ volume in cylinder. |
| A. | largest, smallest |
| B. | smallest, largest |
| C. | equal, equal |
| D. | none of the mentioned |
| Answer» C. equal, equal | |