Select possible cause(s) of an iced-up evaporator on a commercial freezer. You may select more than one
A) Bad condenser fan motor B) Bad defrost timer motor
C) Bad evaporator fan motor D) Shorted defrost termination switch
E) Open defrost heaters F) Dirty condenser
B, C, D, E
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Answer the following statement(s) true (T) or false (F)
1. Transistors are made by joining two pieces of semiconductor material together. 2. If the polarity of the output of the ohmmeter leads is known, the transistor can be identified as either NPN or PNP. 3. If a very high resistance is indicated by the ohmmeter, the transistor is shorted 4. With a transistor, the amount of base-emitter current is small when compared to the collector-emitter current. 5. An analog device can be adjusted to different states.
Individual dots of color on a display are known as ___________.
A. splashes B. blocks C. cells D. pixels
Explain what a resistor is and where you would find it in HVAC circuits
What will be an ideal response?
The grid is ___________
a. All of the electrical power distribution systems in the United States and North America. b. The electrical connection between the solar photovoltaic system generator and the solar photovoltaic systemtower c. The electrical connection that exists only between solar photovoltaic panels in a solar farm.