Yashwantrao Chavan Maharashtra Open University 2006 Certification TML Air Conditioning and Refrigeration - III - Question Paper

Air Conditioning and Refrigeration - III
Air Conditioning and Refrigeration - III
Time : 180 minutes Marks : 100
Instructions for the students :
1. All ques. are compulsory.
2. “Long ans kind ques. (LAQ)” is a supply kind ques. of 20 marks,
which require typical ans of about 60-80 lines in about 32-40 minutes.
3. “Short ans kind ques. (SAQ)” is a supply kind ques. of five marks,
which require typical ans of about 15-20 lines in about 08-10 minutes.
4. Use of non-programmable kind of scientific calculator is allowed.
5. Draw neat diagrams wherever necessary.
6. presume suitable data if necessary.


Long ans kind ques. (LAQ’s)

1. (a) Show the subsequent processes on psychrometric chart :
i) Sensible Heating
ii) Sensible cooling
iii) Heating and humidification
iv) Heating and dehumidification
v) Cooling and dehumidification.
(b) define the various kinds of fans used for air distribution in
Air conditioning system.


2. (a) define the stepwise installation procedure of packaged air
conditioning system.
(b) define energy efficient operating conditions for Air
conditioning system.


3. define the refrigeration cycle for household refrigerators. Also
define compressor, condenser, expansion device, evaporator
and defrost system of household refrigerator.

4. (a) define the working cycle of absorption water chiller. Also
list merit and demerit of it over a compressor water chiller.
(b) define the various kinds of cooling towers.


Short ans kind ques. (SAQ’s)

5. Differentiate ranging from package and split air-conditioning system. 5
6. elaborate the various instruments used in troubleshooting of air
conditioning system ?

7. List the different kinds of expansion devices in room air
conditioner. discuss any 1 expansion device.

8. elaborate the various kinds of compression cycle water chiller ?

Earning:   Approval pending.