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McqMate
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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