The relative strength of a signal compared to the noise present is called the signal-to-noise ratio
Indicate whether the statement is true or false
TRUE
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To increase the evaporator pressure, the adjustment on top of an automatic expansion valve should be:
A) Turned clockwise. B) Turned on. C) Turned counterclockwise. D) Turned off.
How is a velometer used to determine the CFM at a supply register?
A) The average air velocity is multiplied by the free area of the register. B) The average air velocity is multiplied by 1.08. C) The average air velocity is multiplied by the face area of the register. D) The average air velocity is the same thing as CFM.
What type of circuit can cause extensive damage to other components in the circuit due to an increase in current?
A. Short B. Closed C. Ground D. Open
What type of HVAC work often requires a criminal background check?
A) System installation helper B) Service work in people's homes C) Duct installation technicians D) Industrial service technician