To check the performance of a dry-type evaporator, the service technician would first make sure that the refrigerant coil is operating with enough liquid inside.
Answer the following statement true (T) or false (F)
True
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Power to low-voltage equipment must be supplied from a(n) _____.
a. autotransformer b. critical system circuit c. individual portable isolation transformer d. double-ended system
From which of the following can an animal obtain nutrients?
a. DNA c. Fat cells b. Photosynthesis d. RNA
When a zone thermostat fan control switch is moved from Auto to On, what should happen?
a. All system dampers open and the blower starts. b. The zone damper for each zone set to On opens and the blower starts. c. The zone damper for that zone closes, all the others open, and the blower starts. d. The zone damper remains open at all times, regardless of the system operating conditions.
Which of the following is not a local condition that could cause the International Residential Code to be changed or adapted?
A) Weather B) Materials cost C) Soil D) Efficiency and sustainability requirements