Fluid Mechanics & Thermal Sciences [GATE (Graduate Aptitude Test in Engineering) Mechanical Engineering (ME)]: Questions 31 - 34 of 910
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Question 31
Question MCQ▾
The effects of superheating of vapour in the evaporator and sub cooling of condensate in the condenser, for the same compressor work?
Choices
Choice (4) | Response | |
---|---|---|
a. | Increase the COP | |
b. | Decrease the COP | |
c. | Superheating increases COP, but sub cooling decreases COP | |
d. | Superheating decreases COP, but sub cooling increases COP |
Question 32
Question MCQ▾
In vapor compression refrigeration system, at entrance to which component the working fluid is super-heated vapor?
Choices
Choice (4) | Response | |
---|---|---|
a. | Condenser | |
b. | Expansion valve | |
c. | Evaporator | |
d. | Compressor |
Question 33
Question MCQ▾
Air cooling is used for Freon compressors whereas water jacketing is adopted for cooling ammonia compressors. This is because
Choices
Choice (4) | Response | |
---|---|---|
a. | Latent heat of ammonia is higher than that of Freon | |
b. | Specific heat of water is higher than that of air | |
c. | Of the larger superheat horn of ammonia compression cycle. | |
d. | Thermal conductivity of water is higher than that of air |
Question 34
Question MCQ▾
The total energy of each particle at various places in the case of a perfect incompressible fluid following in continuous stream
Choices
Choice (4) | Response | |
---|---|---|
a. | Keeps on Decreasing | |
b. | Keeps on increasing | |
c. | May increase or decrease | |
d. | Remains constant |