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

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Questions Asked in 2022-23

Refrigeration And Air Conditioning (KME-601) — complete question paper

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. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.

Repeated Questions — KME-601

Questions that appeared in more than one session, found by comparing 3 years of Refrigeration And Air Conditioning papers (2021-22, 2022-23, 2023-24)

2x

What do you understand by DART?

Appeared in: 2022-23 · 2023-24

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