The NEC® requires a minimum clearance of __________ feet above residential property and driveways where the voltage to ground does not exceed 300 volts.
a. 18
b. 10
c. 15
d. None of the above
d. None of the above
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For an evaporator to operate at peak efficiency, _____.
a. the fin spacing should be very wide b. all of the surface area inside the tubes must be exposed to flashing liquid c. the coil temperature should always be higher than the dew point of the air d. the subcooling of the entering refrigerant should be kept to a minimum
The generic schematic symbol for an amplifier is a ____ with one of its points facing to the right.
a. triangle b. diamond c. feathered arrow d. rhomboid
If one compressor is used for three evaporators (two medium temperature and one low temperature), the two medium temperature evaporators will have evaporator pressure regulators installed at their inlets.
Answer the following statement true (T) or false (F)
A double bend is a bend between two parallel faces that are coplanar. The term coplanar means flat surfaces lying on the same plane.
Answer the following statement true (T) or false (F)