When the system pressures are lower than the pressure in the refrigerant tank, such as when the system has just been evacuated or if the system is out of refrigerant, refrigerant can be added to both the high and low pressure sides of the system.

Answer the following statement true (T) or false (F)


True

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Tooth type refers to the shape of the tooth

Indicate whether the statement is true or false.

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Which of the following is a practical use of a solar system?

A) Use a solar system in lieu of a heat pump for heating during winter. B) Use a solar system to operate a heat pump during winter. C) Use a solar collector to raise the temperature of water entering the heat pump. D) Use a solar collector to control the flow of water entering the heat pump.

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The total floor area of a building 60 feet x 80 feet is ____________ sq.ft..

Fill in the blank(s) with the appropriate word(s).

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When the surface of an object is ____ the plane of projection, the surface appears in its true size and shape on the plane of projection.

A. parallel to B. perpendicular to C. at right angles with D. within E. none of the above

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