An air-conditioning system with a high-side restriction will operate with:
A) A high suction pressure and a low head pressure.
B) A high suction pressure and a high head pressure.
C) A low suction pressure and a high head pressure.
D) A low suction pressure and a low head pressure.
[Ques. 2] What is the purpose of a cooling tower?
A) To reduce the temperature of cooling water by evaporation
B) To add humidity to the outdoor air when it is too dry
C) To evaporate the excess water created in an industrial process
D) To produce cool air by evaporation
[Ques. 3] Which of the following techniques releases a stuck check valve?
A) Adding refrigerant to shift the position of the valve
B) Moving a magnet along the middle or end of the valve
C) Purging the system to shift the position of the valve
D) Switching cycles to create or release pressure on the valve
[Ques. 4] Which type of space heater is generally the least expensive to purchase?
A) Electric space heater B) Kerosene space heater
C) Vented gas space heater D) Unvented gas space heater
[Ques. 5] LP gas is considered more hazardous than natural gas because:
A) LP gas is flammable and poisonous.
B) LP tends to puddle in low areas but natural gas tends to dissipate.
C) LP gas is poisonous.
D) LP gas is flammable.
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