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HVAC Air Conditioning Practice Test -3

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Question 1 of 10

1. Question
1 points
An evaporative cooling method cools the indoor air by lowering its wet bulb temperature and by increasing its dry bulb temperature.
- True
- False
Correct

Incorrect
Question 2 of 10

2. Question
1 points
What should be temperature range of water used for cold-water coil cooling method?
- 35<sup>0</sup> F to 55<sup>0</sup>F
- 40<sup>0</sup> F to 65<sup>0</sup>F
- 15<sup>0</sup> F to 25<sup>0</sup>F
- 10<sup>0</sup> F to 45<sup>0</sup>F
Correct

Incorrect
Question 3 of 10

3. Question
1 points
Which of the following is the primary purpose of the compressor in refrigeration system?
- Establishing a pressure difference in the system
- Increasing the refrigerant flow in the system
- Increasing the temperature of the refrigerant at inlet of condenser
- To pump the refrigerant the refrigerant throughout the system
Correct

Incorrect
Question 4 of 10

4. Question
1 points
If the system head increases, the fan need …………. horse power to pump air through the system.
- High
- Low
Correct

Incorrect
Question 5 of 10

5. Question
1 points
What should be air velocity in the air ducts to minimize the effect of frictional losses?
- High
- Low
- Moderate
Correct

Incorrect
Question 6 of 10

6. Question
1 points
Brake hose power on the fan motor varies as directly ………….. of the fan rpm ratio.
- Cube
- Square
- Quadruple
Correct

Incorrect
Question 7 of 10

7. Question
1 points
A ton of refrigeration is equal to …………
- 1800 Btu per hour
- 1200 Btu per hour
- 1500 Btu per hour
- 1000 Btu per hour
Correct

Incorrect
Question 8 of 10

8. Question
1 points
In order to meet minimal standards of comfort ………………… must be reduced to an acceptable level
- Latent heat of the air
- Sensible heat of the air
- Both latent and sensible heat of the air
Correct

Incorrect
Question 9 of 10

9. Question
1 points
The heat which changes the temperature of substance is …………………..
- Latent heat
- Sensible heat
- Super heat
- Dew heat
Correct

Incorrect
Question 10 of 10

10. Question
1 points
Under constant temperature the absolute pressure of a gas varies …………….. as its volume
- Inversely
- Proportionally
- Double
- Same
Correct

Incorrect

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