B.TechSemester 72022-23Hvac SystemsKME072
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Hvac Systems (KME072) - AKTU Question Paper 2022-23

B.Tech · Semester 7 · Free PDF Download

This is the official AKTU Hvac Systems Previous Year Question Paper for B.Tech Semester 7, 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 7
Session:2022-23
University:AKTU / UPTU

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Questions Asked in 2022-23

Hvac Systems (KME072) — complete question paper

Section AAttempt all questions in brief. 2x10 = 20
  • a
    Explain the process of c hemical dehumidification
  • b
    How can moisture be removed from a refrigeration system?
  • c
    Mention the significance of alignment circle on a psychometric chart
  • d
    What is Effective Sensible Heat Factor?
  • e
    What is auto refrigeration?
  • f
    Define effective temperature. Explain its utility in comfor t air conditioning
  • g
    What is human comfort according to ASHRAE?
  • h
    Explain the importance of so l air temperature in cooling lo ad calculations. (i) Which type of duct is norma lly preferred in air conditioning? (j) Define specific spee d of a centrifugal fan
Section BAttempt any three of the following: 10x3 = 30
  • a
    What are the desirable prope rties of an ideal refrigerant?
  • b
    Illustrate the advantages a nd disadvantages of mechanical v entilation over natural ventilation?
  • c
    Analyze the factors that determine human comfort
  • d
    Discuss the different types of heat loads which are taken into account in order to estimate the total heat load of a large restaurant for summer air conditioning
  • e
    Describe the different met hods of air conditioning duct design
Section CAttempt any one part of the following: 10x1 = 10
  • a
    Derive the expression for COP of a refrigerating system con sisting of three evaporators at the same temperature with single compresso r and expansion valve
  • b
    What are azeotropic and non-azeotropic mixtures? Explain, i n brief, their advantages giving examples
  • a
    Explain the various industria l applications of air conditioning
  • b
    Explain with a neat sketch , working of an underground heat pump
  • a
    Compare all-water, all-air and air-water air conditioning systems
  • b
    With the help of neat sketches, explain how unitary system differ from central air conditioner
  • a
    A quantity of air having a volume of 300 m 3 at 30 0C D.B.T. and 25 0C W.B.T. is heated to 40 0C D.B.T. Estimate the amount of heat added, final R.H. and W.B.T
  • b
    In a heating application, moist air enters a steam heating coil at 10 0C, 50% RH and leaves at 30 0C. Determine the sensible heat transfer, if mass flow rate of air is 100 kg of dry air per second. Also determine the steam mass flow rate if steam enters saturated at 100 0C and condensate leaves at 80 0C
  • a
    A stream of air at 20 0C, 90% relative humidity and flowing at the rate of 5 m 3/min mixes adiabatically with another air with corresponding parameters of 30 0C, 50% and 20 m 3/min. Presuming that both the streams are at 760 mm of mercury p ressure, determine the follow ing parameters for the mixed stream
  • a
    dry and wet bulb temperature
  • b
    relative humidity and specific humidity
  • b
    The following data refer to a bank for 100 persons in the p remises: Ambient conditions: 37 0C DBT and 27 0C WBT Required inside conditions: 22 0C DBT and 60% RH Sensible heat: 110 kW Latent heat: 55 kW Ventilation requirement: 0.0047 m 3/sec per person. If the bypass factor for the coil is 0.15, make calculations for
  • b
    effective sensible heat factor
  • c
    apparatus dew point, and
  • d
    volume flow rate of humidified air

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.

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