MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Refrigeration knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Superheating before compression increases the refrigeration effect. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
In domestic vapor compression refrigeration, the refrigerant commonly used is? |
| A. | Freon 12 |
| B. | CO<sub>2</sub> |
| C. | H<sub>2</sub>O |
| D. | Ammonia |
| Answer» B. CO<sub>2</sub> | |
| 3. |
What is the mass flow rate of the refrigerant when the heat required is 100 MJ/hr, enthalpy at discharge H2 is 434.5 KJ/kg and enthalpy of liquid Hf3 in KJ/kg at point 3 in p-h diagram is 271.97? |
| A. | 10.254 kg/hr |
| B. | 15.56 kg/hr |
| C. | 10.254 kg/min |
| D. | 15.56 kg/min |
| Answer» D. 15.56 kg/min | |
| 4. |
The COP of vapor compression when vapor is superheated after compression having refrigeration effect (Re) of 360 and work done (W) of 40 is? |
| A. | 8 |
| B. | 6.7 |
| C. | 7.8 |
| D. | 9 |
| Answer» E. | |
| 5. |
The net effect of superheating is to have ________ COP. |
| A. | higher |
| B. | lower |
| C. | moderate |
| D. | higher or lower depending on the refrigerant used |
| Answer» C. moderate | |