In the event of a fire, fire dampers prevent oxygen from feeding the fire by:
A) Spraying suppressant foam.
B) Limiting the amount of outside air to 10 percent.
C) Closing off the outside air supply completely.
D) Removing all oxygen from the space.
[Ques. 2] Poor ________ are the most common cause of communication errors.
A) voltages B) cooling C) connections D) pressures
[Ques. 3] Select the characteristics of a small console dehumidifier. You may choose more than one.
A) Can provide outside ventilation
B) Does not require a drain
C) Must sit in the room being conditioned
D) Can provide high-efficiency air filtration
E) Connects to duct system
[Ques. 4] Where should the vapor barrier be placed when insulating walls in a cold climate?
A) About halfway between the inner and outer walls
B) Toward the inside of insulated wall
C) Toward the outer wall
D) Outer walls should not use a vapor barrier.
[Ques. 5] After diagnosing a defective compressor, the technician should:
A) Rebuild the compressor in the field.
B) Add a hard start kit to improve compressor performance.
C) Determine why the original compressor failed.
D) Add refrigerant to improve compressor performance.
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