NATE Air Conditioning and Heat Pump Questions and Answers | Latest Update
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Course
NATE
Institution
NATE
Which of the following factors affects a customers level of comfort?
All of the above
A cooling load calculation estimates the sensible heat gain of the structure. The cooling-only
system should be within _____% of this calculated value.
+15%
The maximum sensible cooling capacity of a heat ...
Heat pump compressors sometimes run hotter than compressors used in cooling-only units
because heat pump compressors _____.
✓ exhibit low refrigerant density at low suction pressures during the
heating cycle
When is crankcase heat most needed?
✓ When the compressor is off
Work done on the refrigerant in the condenser is transferred as ____.
✓ Both sensible and latent heat
Why are more circuits needed in the outdoor coils used in heat pumps than in the
condenser coils used in cooling-only units?
✓ To keep the pressure drop across the outdoor coil low
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