The __________ method of leak detection is primarily used on systems that have already been put into service,
A. electronic leak detector
B. halide leak detector
C. ultrasonic leak detector
D. ultraviolet leak detector
Answer: D
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Welding cable may only be installed in a _____.
a. dedicated cable tray b. nonmetallic cable tray c. cable tray with steam and drainage pipes d. cable tray in hoistways
The rotor of an ECM motor is composed of:
A) Layers of laminated soft iron. B) Copper windings coiled around layers of laminated soft iron. C) Permanent magnets glued to a hollow steel cylinder. D) A solid bronze casting.
The hold time for a typical TTL J-K flip-flop (such as the 74LS76 ) is
A) 0 nsec. B) 40 nsec. C) 20 nsec. D) 100 ?sec.
List two factors that should be considered when selecting an appropriate scale for a sectional drawing.
What will be an ideal response?