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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
B.VOC. -SEMESTER 1(NEW SYLLABUS) EXAMINATION- WINTER 2018
Subject Code: 1110402 Date: 17-01-2019
Subject Name: Basics of Air Conditioning
Time: 10:30 AM to 12:30 PM Total Marks: 50
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Marks
Q.1

Define following terms
Moist Air
Dry Bulb Temperature
Dew Point Temperature
Wet Bulb Temperature
Dew point Depression
05

Component of Air conditioning System and its Work
05
Q.2

Draw Psychrometric chart and mark psychrometric various properties on chart.
05

Explain Dalton's law of partial pressure and Compotation of Air.
05
OR

Explain Dehumidification and Humidification. also plot in Psychometric Chart
05
Q.3

What is Air Conditioning? Define Psychrometry?
05

Application of Air Conditioning System.
05
OR
Q.3

Explain Central Air Conditioning system.
05

Explain specific Humidity, Degree of Saturation, Relative Humidity, Humid Specific volume, Enthalpy of moist air.
05
Q.4

Explain Sensible Heating and Sensible Cooling Process and also plot in Psychometric Chart
05

Factors affecting the Sensible heat load.
05
OR
Q.4

What is Latent heat load? Factors affecting the Latent heat load.
05

Short note on Window Air Conditioner.
05
Q.5

Explain summer air conditioning system with neat sketch.
05

Find all psychrometric properties for the following data using chart.
DBT=30 0C, WBT= 25 0C
DPT= 15 0C, DBT 35 0C
05
OR
Q.5

Barometric pressure 1 bar.
DBT 33 0C, WBT=23 0C
Calculate Vapor pressure
Relative Humidity
Specific Humidity DPT Enthalpy
05

Explain Year all around Air Conditioning System.
05