Why are both lines of a mini-split system insulated?
A) Because there is only one metering device B) Because it can connect up to 8 sections
C) Because they do not have any ductwork D) Because the entire unit is outdoors
[Ques. 2] What effect does slowing down the blower speed have on a heating unit?
A) It increases the air temperature rise. B) It does not affect the unit temperature.
C) It decreases the air temperature rise. D) It causes return-air temperature to increase.
[Ques. 3] ________ represents the amount of water vapor in the air compared to the amount of water vapor the air can hold.
A) Specific humidity B) Wet-bulb temperature
C) Relative humidity D) Density
[Ques. 4] The terms upflow, horizontal, and downflow refer to the direction of:
A) Heat flow through air-conditioning evaporator coils.
B) Refrigerant flow through air-conditioning evaporator coils.
C) Electrical current flow through the evaporator fan motor.
D) Airflow through split-system air-conditioning evaporator coils.
[Ques. 5] To increase the operating superheat on a thermostatic expansion valve:
A) The sensing bulb should be moved farther away from the evaporator.
B) The adjusting stem should be turned counterclockwise.
C) The adjusting stem should be turned clockwise.
D) The power head should be tightened one-quarter turn on the valve.
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