B.TechSemester 62022-23Refrigeration And Air ConditioningKME-601

Refrigeration And Air Conditioning (KME-601) - AKTU Question Paper 2022-23

B.Tech · Semester 6 · Free PDF Download

This is the official AKTU Refrigeration And Air Conditioning Previous Year Question Paper for B.Tech Semester 6, academic session 2022-23. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech

Semester:Semester 6

Session:2022-23

University:AKTU / UPTU

Rate this paper

Questions Asked in 2022-23

Refrigeration And Air Conditioning (KME-601) — extracted question text

Section AAttempt all questions in brief. 2 x 10 = 20

b
What do you understand by DART?
c
Mention the advantages of vapour compression refrig eration system over air refrigeration system
d
How does an actual vapour compression cycle differ from that of a theoretical cycle?
e
What are the desirable properties of an ideal refrigerant?
f
Explain CFC -free refrigerant
g
Define sensible heat factor
h
Define Heating and Humidification process on Psychrometric chart. (i) Explain de -frosting in refrigeration. (j) Write the function of capillary tube

Section BAttempt any three of the following: 10 x 3 = 30

a
A cold storage is to be maintained at -5°C while th e surroundings are at 35°C. The heat leakage from the surroundings into the cold st orage is estimated to be 29 kW. The actual COP of the refrigeration plant is one-th ird of an ideal plant working between the same temperatures. Find the power required to drive the plant
b
What are the advantages of compound compression wit h intercooler over single stage compression?
c
Draw a neat diagram of three -fluid system of refrigeration (Electrolux refrigeration system) and explain its working
d
What is fog? Show on the psychometric chart when tw o air streams yield fogged state of air
e
Which are the important equipments being used in re frigeration and air- Conditioning systems? Describe the basic function a nd significance of each equipment, in brief

Section CAttempt any one part of the following: 10 x 1 = 10

a
An aircraft refrigeration plant has to handle a cab in load of 30 tonnes . The atmospheric temperature is l7°C. The atmospheric ai r is compressed to a pressure of 0.95 bars and temperature of 30°C due to ram act ion. This air is then further compressed in a compressor to 4.75 bars, cooled in a heat exchanger to 67°C, expanded in a turbine to 1 bar pressure and supplie d to the cabin. The air leaves the cabin at a temperature of 27°C. The isentropic efficiencies of both compressor and turbine are 0. 9. Calculate the mass of air cir culated per minute and the C.O.P. For air, C P = 1.004 KJ/Kg K and C P/C V= 1.4
b
Explain, with a neat sketch, the working principle of boot -strap evaporative type of air refrigeration system with T-S diagram
a
Describe, with the help of schematic and p-h diagra ms, the working of a two stage compression system with water intercooler, liquid s ubcooler and a liquid flash chamber
b
The temperature limits of an ammonia refrigerating system are 25°C and -l0°C. If the gas is dry at the end of compression, calculate the coefficient of performance of the cycle assuming no under-cooling of the liqui d ammonia. Use the following table for properties of ammonia: Temperature Liquid Heat Latent Heat Liquid Entropy
a
With the help of a neat sketch, explain in brief, t he working principle of practical vopour Absorption Refrigeration system, obtaining a n expression for maximum C.O.P of the cycle. Also determine the C.O.P of a V apour Absorption system having a Generator temperature of 1100°C, evaporato r temperature of-15°C and absorber/condenser temperature of 40°C
b
Define primary refrigerant. What are the desirable properties of a primary refrigerant? Give the refrigerant number for the fo llowing: CHCLF 2, CH 2F-CF 3, and NH 3
a
Classify different types of air-conditioning system used. Draw a neat diagram of air-conditioning system required for winter season. Explain the working of different components in the circuit
b
Room air having a DBT of 40 °C and WBT of 25 °C is cooled through sensible cooling process up to a temperature of 25 0C show it on a psychometric chart and determine the amount of heat removed ( in KJ/kg of dry air)
a
Explain the working of ice manufacturing in ice manufacturing plant
b
Explain the methods of food preservation in detail

Question text is extracted from the official AKTU question paper PDF above. Check the original PDF for equations, diagrams and complete wording. Extracted: 2026-08-23.

Refrigeration And Air Conditioning — Other Year Papers

AKTU Refrigeration And Air Conditioning PYQs from other sessions

Refrigeration And Air Conditioning2021-22 Refrigeration And Air Conditioning2023-24 Refrigeration And Air Conditioning2024-25

More B.Tech Semester 6 (2022-23) Papers

Other subjects from same semester and session

Digital Communication2022-23 Image Analytics2022-23 Power System Ii2022-23 Design Of Concrete Structures2022-23 Analog Signal Processing2022-23 Web Technology2022-23 Data Analytics2022-23 Microcontrollers Embedded System2022-23

View all B.Tech Semester 6 2022-23 papers →

Syllabus & More PYQs

Paper solve karne se pehle unit-wise syllabus dekh lo

AKTU 3rd Year PYQs — All Branches