MCQOPTIONS
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MCQOPTIONS
This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Thermodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The volumetric efficiency is given by |
| A. | 1-C+C(p2/p1)^(1/n) |
| B. | 1+C-C(p2/p1)^(1/n) |
| C. | 1+C+C(p2/p1)^(1/n) |
| D. | 1-C-C(p2/p1)^(1/n) |
| Answer» C. 1+C+C(p2/p1)^(1/n) | |
| 2. |
Clearance(C) is defined as |
| A. | (piston displacement per cycle / clearance volume )^n |
| B. | piston displacement per cycle / clearance volume |
| C. | clearance volume / piston displacement per cycle |
| D. | (clearance volume / piston displacement per cycle)^n |
| Answer» D. (clearance volume / piston displacement per cycle)^n | |
| 3. |
The ratio of the actual volume of gas taken into cylinder during suction stroke to the piston displacement volume is called the volumetric efficiency. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 4. |
The isothermal efficiency of a compressor is given by |
| A. | p1*v1/ total work of compression |
| B. | p1*v1*ln(p2/p1) / total work of compression |
| C. | total work of compression / p1*v1*ln(p2/p1) |
| D. | total work of compression / p1*v1 |
| Answer» C. total work of compression / p1*v1*ln(p2/p1) | |
| 5. |
If there are N stages of compression, then the pressure ratio in each stage is |
| A. | p2/p1 = (discharge pressure/suction pressure)^(1/N) |
| B. | p2/p1 = (suction pressure/discharge pressure)^(1/N) |
| C. | p2/p1 = (discharge pressure/suction pressure)^N |
| D. | p2/p1 = (suction pressure/discharge pressure)^N |
| Answer» B. p2/p1 = (suction pressure/discharge pressure)^(1/N) | |
| 6. |
For >n>1 and for the same pressure ratio p2/p1, the maximum work is needed for |
| A. | isothermal compression |
| B. | adiabatic compression |
| C. | polytropic compression |
| D. | all need same work |
| Answer» C. polytropic compression | |