Technician A says that a pressure check valve should hold system pressure for at least five minutes after the pump is shut off. Technician B says that a defective check valve could cause long cranking time. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
C
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Reduce all fractions to their simplest forms. Convert all improper fractions to mixed numbers. Provide answers in the following format:
Fraction: 3/4 Mixed number: 1 5/8 12 1/5 x 5 = ?
In which quadrant of motor operation is the motor driving a load and turning in the forward direction?
A. Quadrant 1 B. Quadrant 2 C. Quadrant 3 D. Quadrant 4
In the colony of Manhattan in New York, ________ caused people to build a wall along the street that later became Wall Street
a. Sewage c. Neighbors b. Roaming pigs d. Bank robberies
The metering device for most ductless systems not using VRF technology is _____
a. a fixed restrictor b. a thermostatic expansion valve c. located in each outdoor unit d. located in the indoor unit