B.TechSemester 72024-25Hvac SystemsKME072

Hvac Systems (KME072) - AKTU Question Paper 2024-25

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 2024-25. 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:2024-25

University:AKTU / UPTU

Rate this paper

Questions Asked in 2024-25

Hvac Systems (KME072) — complete question paper · 100 marks · 3 Hours

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

a
Define the effect of superheating on the COP of a vapour compression cycle
b
What are Hydrofluoro-Olefins, and why are they considered futur e refrigerants?
c
Explain the significance of Appa ratus Dew Point (ADP) in air co nditioning systems
d
What is the bypass factor in a cooling coil? Explain its importance
e
Differentiate between unitary and central air conditioning systems
f
Describe the purpose of mechanical ventilation in buildings
g
What is the shading device? Explain its role in reducing heat gain
h
Define the stack effect in infiltration load calculations. 4 K1 i. What is the equal friction method in duct design? 5 K2 j. Differentiate between centrifugal and axial fans

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

a
Draw and explain the transcritic al vapour compression refrigeration cycle on
b
Describe the psychrometric processes involved in summer air conditioning
c
Discuss the advantages and limitations of decentralized heat pu mps in industrial applications
d
Derive an expression to calculate the heat transfer through wal l s u s i n g t h e decrement factor
e
Explain the velocity reduction method for duct design with its applications

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

a
Explain the classification of refrigerants based on safety stan dards with examples
b
Show that, for t 0 = –15°C and t k = 30°C, for isobutane the suction state for maximum COP lies in the superheat region
a
Explain the working principle of an air washer with a hygroscopic solution
b
Saturated steam at standard atmospheric pressure is injected into a passing air stream in an amount sufficient to raise the absolute humidity f rom 0.0057 to 0.0143 kg w.v./kg d.a. If the air enters the humidifier at 21°C DBT, determine its leaving state
a
Explain the working of a double-bundle condenser in heat pumps
b
A simple saturation ammonia compression system has a high pressure of 1.35 MN/m2 a n d a l o w p r e s s u r e o f 0 . 1 9 M N / m2. Find per 400,000 kJ/h of refrigerating capacity, the power consumption of the compressor and COP of the cycle
a
Calculate the heat gain through a glass window using solar radiation data
b
Explain the concept of energy conservation in air-conditioned buildings
a
Describe the mechanism of flow through supply air outlets in duct systems
b
Discuss the causes and solutions t o vibration and noise in air conditioning piping systems

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.

Hvac Systems — Other Year Papers

AKTU Hvac Systems PYQs from other sessions

Hvac Systems2022-23

More B.Tech Semester 7 (2024-25) Papers

Other subjects from same semester and session

Electric Drives2024-25 Additive Manufacturing2024-25 Machine Learning2024-25 Maintenance Engineering Management2024-25 Disaster Preparedness And Management2024-25 Speech Processing2024-25 Power Plant Engineering2024-25 Vlsi Design2024-25

View all B.Tech Semester 7 2024-25 papers →

Syllabus & More PYQs

Paper solve karne se pehle unit-wise syllabus dekh lo

AKTU 4th Year PYQs — All Branches