REFRIGERATION AND AIR CONDITIONING
6th Exam/Meoh/5313/Dec‘07
Duration:
3 Hrs. Max. Marks: 75
Note :
Attempt any five questions.
Q1
a. How is
the effectiveness of a refrigeration system measure?
b.
Differentiate between refrigerator and a heat pump.
c. What are
the methods of refrigeration?
Q2
a.
Describe the mechanism of a simple vapour compression refrigeration system.
b. What are
the applications of actual vapour absorption cycle?
03 What is
sub-cooling and saper-heating? Explain with the help of diagram why is super
heating considered to be good in certain cases?
04
a. What
are the desirable properties of an ideal refrigerant?
b. Describe
in detail, the newer refrigerants. 7
Q5
a. What
is the function of condenser in a refrigeration system?
b. Explain
the function and constructional details of a throttling device.
06
a. Define
the following:
i. Specific
humidity
ii. Absolute
humidity
iii.
Relative humidity
iv. Dew
point temperature
b. Define
sensible heat factor.
Q7. Explain in brief as to how the human body
reacts to changes in temperature of environment. Also explain
the effect of activities on the heat load calculation for comfort application.
Q8 Write
short note on:
i. Central
air-conditioning system
ii. Desert
air cooler
iii. Sensible
and latent heat load
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