What can cause the supply voltage to an electric heating system to drop below the minimum voltage when the unit is operated?
A) A dirty air filter may be causing a high evaporator fan motor amp draw.
B) Power wire is too small or there are poor connections at either end of the power wire.
C) This is normal. The minimum voltage only refers to the voltage with the unit off.
D) The system may be low on refrigerant, causing a high amp draw as the compressor struggles to cool the structure.
B
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All of the following may increase CO except:
A. A restricted fuel filter. B. Higher-than-specified fuel pressure C. A leaking fuel injector. D. A restricted air filter.
From where and how is concrete transported to the construction site?
What will be an ideal response?
Which of the following is an NEC® requirement for grounding and bonding?
a. The path to ground from circuits, equipment, and metal enclosures shall be permanent and continuous. b. The path to ground from circuits, equipment, and metal enclosures shall have sufficiently high impedance to facilitate the operation of protective devices. c. The path to ground from circuits, equipment, and metal enclosures shall rely on the earth as an effective ground fault current path. d. The path to ground from circuits, equipment, and metal enclosures shall be capable of safely carrying twice the maximum current of the system
About how much of the turning torque applied to a head bolt is lost to friction?
A) 80% B) 60% C) 40% D) 20%