What is the Pelletier effect?
What will be an ideal response?
When a DC current passes throogh a thermocouple, one junction heats up and the other junctioin cools off.
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Describe the various electrical codes.
What will be an ideal response?
Excavation contractors tend to concentrate on a single specific type of construction.
Answer the following statement true (T) or false (F)
There are many methods of insulating metal ductwork. Which of the following methods is NOT used to insulate ducts
A) Bubble outer wrap or liner B) Fiberglass liner C) Spray on urethane foam D) Fiberglass outerwrap with vapor barrier
In which of the following modes would you expect to find hot, high-pressure refrigerant flowing through
the outdoor coil? a. Cooling only b. Cooling and defrost c. Heating only d. Heating and defrost