Searching for I Semester B.Tech Mechanical Rajiv Gandhi Proudyogiki Vishwavidyalaya RGPV Question Papers? Get now November 2006 old question paper of this university for the subject REFRIGERATION and AIR CONDITIONING. Look at the details of the question paper below and download the full question paper as scanned image format as well as text format
University Name : Rajiv Gandhi Proudyogiki Vishwavidyalaya RGPV
Department : IV BTech Mechanical Engineering
Question Paper Semester : I
Exam Year: November 2006
Question Paper Code: RR410305
Subject Name of Question Paper: REFRIGERATION and AIR CONDITIONING
Question Paper Description : Scanned and Text Version of 2006 Rajiv Gandhi Proudyogiki Vishwavidyalaya RGPV First Semester B.Tech EEngineering REFRIGERATION and AIR CONDITIONING University Question Paper November 2006
2008 Course
Rajiv Gandhi Proudyogiki Vishwavidyalaya
Code No: RR410305
Set No. 1
IV B.Tech I Semester Regular Examinations, November 2006
REFRIGERATION & AIR CONDITIONING
(Mechanical Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. (a) Explain the boot strap air cycle refrigeration system with a schematic and cycle diagrams. [8]
(b) Derive an expression for the COP of Bell- Coleman cycle. [8]
2. (a) Define the unit of refrigeration. [2]
(b) A refrigerator using Ammonia works between the temperatures -10 deg. C and 25 deg. C. The gas is dry at the end of compression and there is no under cooling of liquid. Using the tables, Calculate the theoretical COP of the cycle. [14]
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 are the characteristics of ideal absorbent and refrigerant mixture in vapour absorption refrigeration. [8]
(b) Explain with a simple sketch the construction of Electrolux refrigeration system. [8]
6. In a Steam jet refrigeration system dry saturated steam at 7 bar abs. pressure is supplied. The flash chamber temperature is 5oC, the condenser temperature is 40oC, make up water is supplied at 20 Deg C. Assuming that quality of motive steam and flash vapour at the beginning of compression as 93% dry and efficiency of the nozzle, efficiency of entertainment and the efficiency of the thermo-compressor as 90%, 65%and91% respectively. Determine:
(a) Weight of steam required per hour per ton of refrigeration.
(b) The volume of vapour removed from the flash chamber per hour per ton of refrigeration. [16]
7. (a) Define the term “effective temperature” and explain its importance in air-conditioning systems. Describe the factors which affect the effective temperature. [8]
(b) Define the “human comfort” and describe the factors which affect the human comfort. [8]
8. (a) Explain the working principle of a heat pump which makes use of Rankine power cycle with a neat diagram [8]
(b) Explain solar energy assisted heat pumps by drawing the circuit. [8]
