The three major electrical defects in compressor motors that can be identified using an ohmmeter are:
A) Single-phasing, dual-phasing, and three-phasing.
B) Open, shorted, or grounded.
C) Phased, unbalanced, or blown.
D) Locked, under capacity, and unbalanced.
B
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One important visualization concept is that surfaces retain their ____ from view to view.
A. basic shapes B. dimensions C. areas D. edge orientations
A voltmeter was used to check the coolant and a reading of 0.2 volt with the engine off was measured. A reading of 0.8 volt was measured with the engine running and all electrical accessories turned on. Technician A says that the coolant should be flushed to solve the galvanic activity. Technician B says that the ground wires and connections should be inspected and repaired to solve the electrolysis problem. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
Why are biocides added to cooling-tower water?
A) To increase biofilm B) To decrease the pH C) To increase the pH D) To reduce biofilm
Which of these is NOT a type of lock nut?
A) Nylon ring B) Castle nut and cotter pin C) Wing nut D) Distorted