www.ThinkITI.com

Home
MCQ
Search
Free Apps
Important
Study Groups
Contact Us
Policy

Home
MCQ
Objective Questions
Engineering
Mechanical
ME Set-1
Heat Transfer Refrigeration and Air Conditioning
160

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

160) Environmental protection agencies advice against the use of chloro-fluoro-carbon refrigerants since

these react with water vapour and cause acid rain

these react with plants and cause green-house effect

these react with oxygen and cause its depletion

these react with ozone layer

Answer is:

these react with ozone layer

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

For more MCQ's Click Here

Related Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

161) When the lower temperature of a refrigerating machine is fixed, then the coefficient of performance can be improved by

operating the machine at higher speeds

operating the machine at lower speeds

raising the higher temperature

lowering the higher temperature

Answer is:

lowering the higher temperature

162) The refrigerant carbon dioxide is not widely used because of its __________ power require ments per tonne of refrigeration and high operating pressures.

low

high

normal

none of these

Answer is:

high

163) The by-pass factor of a cooling coil decreases with

decrease in fin spacing and increase in number of rows

increase in fin spacing and increase in number of rows

increase in fin spacing and decrease in number of rows

decrease in fin spacing and decrease in number of rows

Answer is:

decrease in fin spacing and increase in number of rows

164) Dehydration is the process of removing water vapour from the surrounding air.

Right

Wrong

Answer is:

Right

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

For more MCQ's Click Here