Mechanical Engineering : Refrigeration And Air Condition QUESTIONS AND ANSWERS :: part4 : 6 to 10
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
6.The C.O.P. of a domestic refrigerator in comparison to domestic air conditioner will be |
| same |
| more |
| less |
| dependent on weather conditions |
| unpredictable. |
7.Which of the following refrigerants has lowest freezing point |
| Freon-12 |
| NH3 |
| C02 |
| Freon-22 |
| S02. |
8.Reducing suction pressure in refrigeration cycle |
| lowers evaporation temperature |
| increases power required per ton of refrigeration |
| lowers compressor capacity because vapour is lighter |
| reduces weight displaced by piston |
| all of the above. |
9.The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is |
| same |
| more |
| less |
| more or less depending on ambient conditions |
| unpredictable. |
10.The advantage of dry compression is that |
| it permits higher speeds to be used |
| it permits complete evaporation in the evaporator |
| it results in high volumetric and mechanical efficiency |
| all of the above |
| none of the above. |
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