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

1. Adding thermal mass to save energy is a good economic investment.
2. Owners should be encouraged to use more insulation than the minimum prescribed by ASHRAE Std. 90.1.
3. For climate Zone 4 higher ventilation levels always result in higher air conditioning energy.
4. For climate Zone 4 higher ventilation levels always result in higher heating energy.


1. FALSE
2. FALSE
3. TRUE
4. FALSE

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Why are copper fittings cleaned before soldering or brazing?

A) To remove oxides B) To create enough clearance so that the pipe will fit into the fitting C) To enhance the aesthetic appearance of the completed joint D) To make it easier to see the junction between the fitting and the pipe

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If electric heating elements are used in conjunction with a heat pump, when do they operate?

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