## Refrigeration and Air Conditioning, Question Paper of M.Tech 6 Semester, Download Previous Years Question Paper 6

• Thursday, October 20, 2016

REFRIGERATNI'ON AND" AIR CONDITIONING
6th Exam/Tech/4453/May 10

Duration: 3 Hrs.                                                                                    Max- Marks: 75

Note: Attempt any five questions. O. No. 1 is compulsory.

Q1 Fill in the blanks:
i. One tone of refrigeration is equal to _________kJ/minute-
ll. Usually GOP is one.
iii. The boiling point of ammonia is
iv. is a refrigerant, which is highly toxic and inflammable.
v. For unsaturated air, the dew point temperature is wet bulb temperature.
vi. The sensible heat factor for auditorium or cinema hall is generally kept as
vii. Most thermostatic expansion valves are set for a superheat of
viii. Flooded evaporator has to be fitted with
ix. For ammonia refrigeration system, the tube of a shell and tube condenser are made of
x. An Electrolux refrigerator is called a fluids absorption system.

02 a. Describe with neat diagrams the working principle and functions of mam parts of vapour compression system.
b. Explain the effect of superheating-g on the performance of vapor compression system.

03 a. Give classification of refrigerants and any five of them most commonly used and their one application each.
b. Describe briefly properties of an ideal refrigerant.

04 a. State merits and demerits of air refrigeration system.
b. How will you calculate mass flow rate work clone and COP for Bell Coleman cycle?

Q5. Describes briefly with the help of diagram the vapour absorption system of refrigeration. In What way this system is advantageous over the vapour compression system?

b. Differentiate between free and forced condensers.

Q7 a. Define "the terms: specific humidity, relative humidity, degree of saturation, wet bulb temperature (WEIT) and: total enthalpy of air.
b. Explain the significance of various lines on a psychometric chart.

Q8  Write short note on:
a. Function of a compressor

b. Heat load estimation Capillary tube