HVAC FC 07
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What percentage of a refrigeration load can be placed on an evaporator regulated by a two temperature valve?
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
According to the OSHA safety and health regulation for construction, a fatal accident that results in a death must be reported no later than ___.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When computing heat leakage for a building, the U-value for most types of construction can be obtained from reference books. The unit of measure for U-value is expressed in ___.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Carbon dioxide stack changes with respect to the amount of excess air (oxygen) in the area. Systems will vary in the CO2 content operating between 8% to 12%. If a system uses a oil-fired heating system, what would be the CO2 content of flue gas, given that the excess air in the system was approximately 80%?
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Volatile liquid is located in the ___ and this is in contact with the evaporator of the refrigeration system.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Slowing the velocity of water through an evaporator will have what effect on the heat transfer?
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many CFM of ventilation air is required for a 50,000 Btu/hr infrared heater?
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