What is an electrical load?
A) An electrical device that requires power to operate
B) A problem in a circuit that makes the electricity work harder, reducing efficiency
C) Any device in an electrical circuit
D) The power coming into a unit, usually labeled L1 and L2
[Ques. 2] If the low-side test pressure is not known, the maximum pressure that should be used for leak testing an R-22 refrigeration system with hermetic compressor is:
A) 250 psig. B) 300 psig. C) 200 psig. D) 150 psig.
[Ques. 3] Which of the following is a device that does not switch motor contactors and starters on and off but instead are used to directly start motors?
A) Thermostat B) Heavy-duty relay C) Light-duty relay D) Pulley
[Ques. 4] Two variables that have a great impact on the system performance of air-conditioning systems are:
A) High-side pressure and airflow across the condenser.
B) Airflow across the condenser and condenser water flow.
C) High-side pressure and condenser water flow.
D) Return-air wet-bulb temperature and the airflow across the evaporator.
[Ques. 5] Using the liquid-line ambient temperature approach method to check the charge, if the liquid line is cooler than specified:
A) The amount of charge in the system does not affect the liquid-line temperature.
B) The system is overcharged.
C) The system is charged correctly.
D) The system is undercharged.
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