The _________ is responsible for systems installed in the building
A. technician
B. draftsman
C. inspector
D. engineer
Answer: D
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Explain the purposes of wheel balancing.
What will be an ideal response?
A three-phase, 480 V, six-pole, 60 Hz, induction motor is driving a constant torque load of 80 Nm. The parameters of the motor are:
a. Calculate the magnitude of the injected voltage that would reduce the motor
speed to 800 rpm.
b. Calculate the power received by the injected voltage source.
c. Compute the starting current and the starting torque with the injected voltage.
Technician A says that a two-wire variable resistor is called a rheostat. Technician B says that a three-wire variable resistor is called a potentiometer. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
How does reclaimed refrigerant differ from recovered or recycled refrigerants?
A) Reclaimed refrigerants can be put into new systems. B) Reclaimed refrigerants cannot be reused. C) Reclaimed refrigerants cannot be put back into the same system. D) Reclaimed refrigerants can be reused.