McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
Chapters
| 1. |
Co-efficient of performance of vapour absorption refrigeration system as compared to that for vapour compression refrigeration system is |
| A. | more |
| B. | less |
| C. | may be more or less |
| D. | un - predictable |
| Answer» B. less | |
| 2. |
The function of compressor in vapour compression refrigeration system is performed in vapour absorption system by |
| A. | generator |
| B. | absorber |
| C. | generator, absorber and liquid pump |
| D. | absorber and liquid pump |
| Answer» C. generator, absorber and liquid pump | |
| 3. |
In vapour absorption refrigeration system heating in generator is done at 100°C, refrigeration in evaporator at 10°C and cooling by cooling water in condenser at 30°C. The (COP)max is |
| A. | 0.5 |
| B. | 0.35 |
| C. | 2 |
| D. | in sufficient data |
| Answer» B. 0.35 | |
| 4. |
Electrolux system of refrigeration has |
| A. | only one liquid pump |
| B. | only two liquid pumps |
| C. | no liquid pump |
| D. | none of the above |
| Answer» C. no liquid pump | |
| 5. |
Electrolux refrigerators has the following working substances |
| A. | Hydrogen |
| B. | Ammonia and Hydrogen |
| C. | Ammonia and water |
| D. | Ammonia, hydrogen and water |
| Answer» D. Ammonia, hydrogen and water | |
| 6. |
Which of the following system can be called as mechanical system of refrigeration |
| A. | Vapour absorption system |
| B. | Vapour compression system |
| C. | Steam jet refrigeration system |
| D. | None of the above |
| Answer» B. Vapour compression system | |
| 7. |
The vapour absorption refrigeration system using Ammonia – water has cycle operating pressures |
| A. | higher than that using Lithium Bromide – water |
| B. | lower than that using Lithium Bromide – water |
| C. | may be higher or lower depending upon application |
| D. | higher for sub-zero application and lower for above zero application |
| Answer» A. higher than that using Lithium Bromide – water | |
| 8. |
Shaft work required for vapour absorption system to produce 1 ton refrigeration may be only |
| A. | 50 to 60% of that required for vapour compression system |
| B. | 20 to 30% of that required for vapour compression system |
| C. | 1 to 2% of that required for vapour compression system |
| D. | none of the above |
| Answer» C. 1 to 2% of that required for vapour compression system | |
| 9. |
Work of compression of the fluid in vapour absorption refrigeration system as compared to that for vapour compression refrigeration system is |
| A. | les |
| B. | more |
| C. | may be more or less |
| D. | un - predictable |
| Answer» A. les | |
| 10. |
Munters Platen system of refrigeration is |
| A. | Vapour absorption system with ammonia and water |
| B. | Vapour compression system with ammonia as working substance |
| C. | Electrolux system with Hydrogen, ammonia and water as working substances |
| D. | none of the above |
| Answer» C. Electrolux system with Hydrogen, ammonia and water as working substances | |
| 11. |
Electrolux refrigerators is |
| A. | Vapour compression refrigerator with one compressor |
| B. | vapour absorption refrigerator with no pump |
| C. | vapour absorption refrigerator with one aqua pump |
| D. | None of the above |
| Answer» B. vapour absorption refrigerator with no pump | |
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