MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Refrigeration knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Find the COP of an ideal vapour absorption refrigeration system using the following data.Qg = 1880Qe = 1045 |
| A. | 0.47 |
| B. | 0.65 |
| C. | 0.69 |
| D. | 0.55 |
| Answer» E. | |
| 2. |
In case the heat is discharged at different temperatures in condenser and absorber then the formula for COP would be?Ta = Temperature at which heat is discharged in the absorberTe and Tc are the temperature limits for Carnot refrigeratorTg and Tc are the temperature limits for Carnot engine |
| A. | COP = \(\frac{T_e}{T_c – T_e} × \frac{T_g-T_c}{T_g}\) |
| B. | COP = \(\frac{T_e}{T_c – T_e} × \frac{T_g-T_c}{T_g} × T_a\) |
| C. | COP = \(\frac{T_e}{T_c – T_e} × \frac{T_g-T_c}{T_g} ± T_a\) |
| D. | COP = \(\frac{T_e}{T_c – T_e} × \frac{T_g-T_c}{T_g}\) |
| Answer» E. | |
| 3. |
The expression \(\frac{T_e}{T_c – T_e}\) in the formula for COP i.e. \(\frac{T_e}{T_c – T_e} × \frac{T_g-T_c}{T_g}\) refers to __________Te and Tc are the temperature limits for Carnot refrigeratorTg and Tc are the temperature limits for Carnot engine |
| A. | COP of Carnot engine |
| B. | COP of Carnot refrigerator |
| C. | COP of Carnot pump |
| D. | COP of Bell-Coleman cycle |
| Answer» C. COP of Carnot pump | |
| 4. |
Find the COP of a vapour absorption refrigeration system using the following data.Te = 268Tg = 393.2Tc = 303 |
| A. | 1.53 |
| B. | 1.76 |
| C. | 1.66 |
| D. | 1.98 |
| Answer» C. 1.66 | |
| 5. |
Find the COP of a vapour absorption refrigeration system using the following data.Qg = 6600Qe = 2100 |
| A. | 0.45 |
| B. | 0.65 |
| C. | 0.31 |
| D. | 0.35 |
| Answer» D. 0.35 | |
| 6. |
An ideal vapour absorption refrigeration system may be regarded as a combination of _________ |
| A. | Carnot engine and Carnot pump |
| B. | Carnot refrigerant and Carnot pump |
| C. | Carnot engine and Carnot refrigerant |
| D. | Carnot engine alone |
| Answer» D. Carnot engine alone | |
| 7. |
What is the formula for COP of an ideal vapour absorption refrigeration system?Qg = the heat given to the refrigerant in the generatorQe= the heat absorbed by the refrigerant in the evaporator |
| A. | \(\frac{Q_e}{Q_g}\) |
| B. | \(\frac{Q_g}{Q_e}\) |
| C. | Qg × Qe |
| D. | Qg – Qe |
| Answer» B. \(\frac{Q_g}{Q_e}\) | |