Fluid Mechanics & Thermal Sciences [GATE (Graduate Aptitude Test in Engineering) Mechanical Engineering (ME)]: Questions 31 - 34 of 910

Choose Programs:

🎯 247 Numeric, 1962 MCQs (& PYQs) with Full Explanations (2024-2025 Exam)

Rs. 500.00 -OR-

3 Year Validity (Multiple Devices)

CoverageDetailsSample Explanation

Help me Choose & Register (Watch Video) Already Subscribed?

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

Edit

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

Edit

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

Edit

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

Edit