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Lets know about Air Conditioning & Refrigeration:

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

In Cold water coil cooling system the discharge water is approximately _______ warmer than the supply water

a)

2 to 5 Degree F

b)

5 to 10 Degree F

c)

10 to 15 Degree F

d)

15 to 20 Degree F

2.

_____ is the actual mass of water vapor in one cubic foot of air:

a)

Absolute Humidity

b)

Total Humidity

c)

Specific Humidity

d)

Relative Humidity

3.

Humidification is the removal of moisture to the air:

a)

True

b)

False

4.

According to ASHRAE, the outside fresh air requirement for both residencies and apartments ranges from:

a)

5 to 10 cfm

b)

30 to 40 cfm

c)

20 to 30 cfm

d)

10 to 20 cfm

5.

_____ temperature is the actual temperature of the air measured by an ordinary thermometer:

a)

Both Dry bulb and Wet bulb

b)

Wet bulb

c)

Dry bulb

6.

While calculating the cooling load estimate for a house, each person is given an allowance of _____:

a)

150 Btu

b)

100 Btu

c)

200 Btu

d)

250 Btu

7.

Evaporative cooling system cools the indoor air by lowering its dry bulb temperature:

a)

True

b)

False

8.

Which of the following cooling methods are generally found in large commercial and industrial applications:

a)

Absorption refrigeration

b)

Cooling with steam

c)

Both options are correct

d)

Non Of these Options

9.

While designing the cooling load calculations maximum outdoor summer temperature is considered:

a)

True

b)

False

10.

In refrigerator which of the following is compressed:

a)

Refrigerant Gas

b)

Both Refrigerant Gas and Air

c)

Air

d)

None of the above

11.

The ventilation requirements for a given structure or space are based on which of the following:

a)

Desired number of air changes alone

b)

Number of occupants alone

c)

Both Options are correct

12.

The absolute pressure of a gas at constant temperature varies _______ as its volume:

a)

Directly

b)

Inversely

c)

Cube

d)

Square

13.

_____ is an instrument used to measure relative humidity

a)

Psychrometer

b)

Barometer

c)

Pressure gauge

d)

Manometer

14.

Evaporator absorbs heat into the refrigeration system

a)

True

b)

False

15.

Refrigerated air–conditioning will ____:

a)

removes moisture

b)

removes hot air

c)

cools the air and removes moisture

d)

cools the air

16.

Removal of _____ lowers the air temperature

a)

latent heat

b)

sensible heat

c)

both sensible and latent heat

d)

None of these

17.

When the velocity of the air in the duct reduces, the resulting velocity pressure difference gets converted to ______ pressure:

a)

Dynamic

b)

Static

c)

Both Dynamic & Static

18.

The aluminum fins are coated to ______ surface tension of the condensate water droplets:

a)

Reduce

b)

Increase

19.

Which of the following material is used if the duct application requires less weight:

a)

Galvanized steel

b)

Stainless steel

c)

Aluminum

20.

The chiller dehydrator removes which of the following from refrigerant:

a)

non-condensable gases

b)

water

c)

water and non-condensable gases

d)

none