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16th June 2015, 04:51 PM
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Re: Jiwaji University Model Question Paper

Jiwaji University (JU) is a public affiliating university which is located in Gwalior, Madhya Pradesh, India.

The University was established in 1964.

The list of faculty and the departments and the schools:

Faculty of Arts
School of Studies in Library and Information Science
Faculty of Commerce and Management
School of Studies in Commerce
School of Studies in Management
School of Studies in Tourism Administration
Faculty of Life Science
School of Studies in Biotechnology
School of Studies in Microbiology
School of Studies in Biomedical Technology
School of Studies in Botany
Indra Gandhi Academy of Environment Education Research and Ecoplanning
School of Studies in Zoology
School of Studies in Molecular and Human Genetics
School of Studies in Neuroscience
Institute of Ethnobiology
Faculty of Science
School of Studies in Earth science
School of Studies in Computer Science & Application
School of Studies in Chemistry
School of studies in Environment Chemistry
School of Studies in Marketing Management (MBACSM)
School of Mathematics and Allied Science
School of Studies in Physics
School of Studies in Jyotrivigyan
School of Studies in law
School of Studies in Pharmaceutical Science
Faculty of Social Science
School of Studies in Ancient Indian History Culture and Archeology
School of Studies in Economics
School of Studies in Political Science
School of Studies in Adult/Continuing and Extension Education
Faculty of Physical Education
School of Studies in Physical Education & Sports Science
Tansen Institute of Performing Arts
Faculty of Distance Education
Institute of Distance Education

You are looking for the B.Tech I Semester Regular Examinations Model Question Paper of REFRIGERATION & AIR CONDITIONING Mechanical Engineering. So I am providing it to you:

1. (a) Give a brief description of an ideal cycle of air refrigeration. [6]
(b) A carnot refrigerator and a heat pump are supplied with equal amount of
work. The refrigerator operates between 270C
and +270C and the heat pump
operates between + 450 C and + 270C. The refrigerator absorbs 4000 kJ/ min
at 270C.
The heat pump absorbs all the heat rejected by the refrigerator and
supplies at 450C. Compute
(i) COP of refrigerator
(ii) COP of heat pump
(iii)heat available at + 450C and
(iv) work input to each unit. [10]
2. (a) Describe the use of liquid vapour regenerative heat exchanger in a vapour
compression system [6]
(b) A simple saturation ammonia compression system has a high pressure of 1.35
MN/m 2 and low pressure of 0.19 MN/m 2. Find per 400,000kJ/h of refrigerating
capacity the power consumption of the compressor and COP of the cycle.
[10]
3. (a) Explain the working of a rotary screw compressor. [10]
(b) How the capacity control is achieved in refrigerant compressor? [6]
4. (a) Explain the working of an evaporative condenser.
[10]
(b) Give the comparison of flooded evaporators and dry evaporators.
[6]
5. (a) What is the effect of inert gas in three fluid refrigeration system.
[4]
(b) What is absorption refrigeration system and how it differs from convention
vapour compression system and explain its working. [8]
(c) What is Carnot COP of absorption refrigeration system. How it is differ from
actual COP. [4]
6. (a) With the help of a sketch of the processes on Mollier chart explain how the
refrigeration is produced in steam jet refrigeration system. [10]
(b) What difference does it make when the steam jet refrigeration system operates
with a barometric condenser instead of a surface condenser? [6]
7. An auditorium of 100 seating capacity of conditioned for the given specifications
Out door conditions 35
and 65% RH
Required air inlet conditions 15o
C and 40 RH.
The required condition is achieved first by cooling and dehumidifying and then by
heating. Find the following
(a) The capacity of the cooling coil in tons of refrigeration
(b) Capacity of the heating coil in kW
(c) Bypass
factor of the heating coil if the surface temp of the coil is 22o C [16]
8. (a) Define the following in relation to the conditioned supply air to room ‘Throw’,
‘Drop’ and ‘Spread’. [6]
(b) State the different types of supply air out lots.
(c) Describe the factors governing the selection and location of supply air outlets.
[4]

Contact:
Jiwaji University, Gwalior
Mahalgaon, Gwalior, Madhya Pradesh 474002
0751 244 2712

Map:
[MAP]Jiwaji University, Gwalior[/MAP]


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