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Thursday, October 20, 2016

Refrigeration and Air Conditioning, Question Paper of M.Tech 6 Semester, Download Previous Years Question Paper 10






REFRIGERATION AND AIR CONDITIONING
6th Exam/Mech/5306/May’ 10

Duration: 3 Hrs.                                                                                              Max. Marks: 75

Note: Attempt any five questions.

Q1 Sketch the T- (1: and p-h diagrams for the vapour compressor cycles when the vapour after compression is:
a. dry saturated
b. wet


Q2 What is sub-cooling and super heating? Explain with the help of diagram. Why is super heating considered to be good in certain cases?


03 a. Discuss the properties of R-717. R-22. R-11. R-12 refrigerants.
b. Explain the working of Bell-Collemann cycle and give expressions for mass flow rate, work done and COP.


04 a. Draw a neat diagram of Lithium Bromide absorption system and explain its working. List the major fields of application of this system.
b. Discuss solar power refrigeration system.


Q5 a. What is the functions and essential requirements of a condenser in refrigerator? Discuss fire and forced convection condensers.
b. Define volumetric efficiency of a compressor.


Q6 3. Discuss the functions. advantages and disadvantages of DX evaporators.
b. Explain the working principle of thermostatic expansion valve with the help of neat diagram.


07 What do you understand by "Psychometric’? Define:
i. Specific humidity 
ii. Relative humidity
iii. DBT                                                   
iv. WBT
v. DPT                                                   
vi. Latent heat
vii. Degree of saturation


08 a. What are the different heat sources for calculation of heat load and discuss the factors. which contribute towards load of an air conditioning room?


b. What do you understand by various lines of psychometric chart? 

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