Mechanical Engineering : Refrigeration And Air Condition QUESTIONS AND ANSWERS :: part3 : 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.One ton of the refrigeration is |
| the standard unit used in refrigeration problems |
| the cooling effect produced by melting 1 ton of ice |
| the refrigeration effect to freeze 1 ton of water at 0�C into ice at 0�C in 24 hours |
| the refrigeration effect to produce 1 ton of ice at NTP conditions |
| the refrigeration effect to produce 1 ton of ice in 1 hour time. |
7.For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then |
| bigger cabinet should be used |
| smaller cabinet should be used |
| perfectly tight vapour seal should be used |
| refrigerant with lower evaporation temperature should be used |
| refrigerant with high boiling point must be used. |
8.In vapour compression refrigeration system, refrigerant occurs as liquid between |
| condenser and expansion valve |
| compressor and evaporator |
| expansion valve and evaporator |
| compressor and condenser |
| none of the above. |
9.If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be |
| same |
| more |
| less |
| more/less depending on rating |
| unpredictable. |
10.The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy-diagram represents |
| condensation of the refrigerant vapour |
| evaporation of the refrigerant liquid |
| compression of the refrigerant vapour |
| metering of the refrigerant liquid |
| none of the above. |
More Refrigeration And Air Condition QUESTIONS AND ANSWERS available in next pages
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