MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Refrigeration knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The ratio of COP of vapor compression cycle and COP of Carnot cycle is known as? |
| A. | Relative COP |
| B. | Ideal COP |
| C. | Performance index |
| D. | Theoretical COP |
| Answer» D. Theoretical COP | |
| 2. |
Dry compression is preferred over wet compression. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
In which case does the compression process remains in superheated state? |
| A. | Wet state |
| B. | Dry state |
| C. | Semi-dry state |
| D. | Always |
| Answer» C. Semi-dry state | |
| 4. |
One of the assumptions of the vapor compression cycle is that all of the processes are reversible. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Entropy of dry-saturated vapor when Sf is 0.2513 and Sfg is 4.7878, is _______Sf – Entropy of saturated liquid at pressure pSfg – Entropy change during vaporization |
| A. | 6.987 |
| B. | 5.987 |
| C. | 5.0391 |
| D. | 4.776 |
| Answer» D. 4.776 | |
| 6. |
The COP of vapor compression having vapor as dry saturated after compression having refrigeration effect (Re) of 58.84 and work done (W) of 17.95 is ________ |
| A. | 3.278 |
| B. | 4.39 |
| C. | 4.234 |
| D. | 3.865 |
| E. | of 58.84 and work done (W) of 17.95 is ________a) 3.278b) 4.39c) 4.234d) 3.865 |
| Answer» B. 4.39 | |
| 7. |
In vapor compression cycle having dry saturated vapor at the end of compression the refrigeration effect is given by?H1 – Enthalpy of vapor before compressionH4 – Enthalpy of vapor before entering evaporatorH2 – Enthalpy of vapor after compression |
| A. | H1 – H4 |
| B. | H2 – H4 |
| C. | H1 × H4 |
| D. | H2 × H4 |
| Answer» B. H2 – H4 | |
| 8. |
In vapor compression cycle having dry saturated vapor at the end of compression the work done is given by?H2 – Enthalpy of vapor after compressionH1 – Enthalpy of vapor before compression |
| A. | H2 – H1 |
| B. | H2 + H1 |
| C. | H2 × H1 |
| D. | H2 ÷ H1 |
| Answer» B. H2 + H1 | |