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WorksheetsLets know about Air Conditioning & Refrigeration:
Total questions: 20
Worksheet time: 10mins
In Cold water coil cooling system the discharge water is approximately _______ warmer than the supply water
2 to 5 Degree F
5 to 10 Degree F
10 to 15 Degree F
15 to 20 Degree F
_____ is the actual mass of water vapor in one cubic foot of air:
Absolute Humidity
Total Humidity
Specific Humidity
Relative Humidity
Humidification is the removal of moisture to the air:
True
False
According to ASHRAE, the outside fresh air requirement for both residencies and apartments ranges from:
5 to 10 cfm
30 to 40 cfm
20 to 30 cfm
10 to 20 cfm
_____ temperature is the actual temperature of the air measured by an ordinary thermometer:
Both Dry bulb and Wet bulb
Wet bulb
Dry bulb
While calculating the cooling load estimate for a house, each person is given an allowance of _____:
150 Btu
100 Btu
200 Btu
250 Btu
Evaporative cooling system cools the indoor air by lowering its dry bulb temperature:
True
False
Which of the following cooling methods are generally found in large commercial and industrial applications:
Absorption refrigeration
Cooling with steam
Both options are correct
Non Of these Options
While designing the cooling load calculations maximum outdoor summer temperature is considered:
True
False
In refrigerator which of the following is compressed:
Refrigerant Gas
Both Refrigerant Gas and Air
Air
None of the above
The ventilation requirements for a given structure or space are based on which of the following:
Desired number of air changes alone
Number of occupants alone
Both Options are correct
The absolute pressure of a gas at constant temperature varies _______ as its volume:
Directly
Inversely
Cube
Square
_____ is an instrument used to measure relative humidity
Psychrometer
Barometer
Pressure gauge
Manometer
Evaporator absorbs heat into the refrigeration system
True
False
Refrigerated air–conditioning will ____:
removes moisture
removes hot air
cools the air and removes moisture
cools the air
Removal of _____ lowers the air temperature
latent heat
sensible heat
both sensible and latent heat
None of these
When the velocity of the air in the duct reduces, the resulting velocity pressure difference gets converted to ______ pressure:
Dynamic
Static
Both Dynamic & Static
The aluminum fins are coated to ______ surface tension of the condensate water droplets:
Reduce
Increase
Which of the following material is used if the duct application requires less weight:
Galvanized steel
Stainless steel
Aluminum
The chiller dehydrator removes which of the following from refrigerant:
non-condensable gases
water
water and non-condensable gases
none
