Technician A says that the 15° rule states that for every 15°F the temperature rises, it will take longer for a urethane finish to cure. Technician B says that cold does not affect the way urethane finishes cure. Who is correct?
A. Technician A only
B. Technician B only
C. Both Technicians A and B
D. Neither Technician A nor B
A. Technician A only
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What happens when dual-voltage transformers are connected improperly?
What will be an ideal response?
Some modern power transmission systems now have major, high voltage DC transmission segments. There are a lot of good reasons for doing this but we will not go into them here. To go from the AC to DC, power electronics are used. We start with three-phase AC and then rectify it (using a full-wave rectifier). It was found that using a delta to wye and delta combination connected secondary would give us a much smaller ripple after the full-wave rectifier. How is this accomplished? Remember that these are real devices and are wound on common cores. Hint, using Figures 13.47 and 13.49, and the fact that each coil of the wye connected secondary and each coil of the delta connected secondary are wound around the same core of each coil of the delta connected primary so the voltage of each
of the corresponding coils are in phase. When the output leads of both secondaries are connected through full-wave rectifiers with the same load, you will see that the ripple is now greatly reduced. Please consult the instructor for more help if necessary. What will be an ideal response?
System software is called the operating system
Indicate whether the statement is true or false
Edge forms made of flexible plastic can be curved to a radius of as little as _____
a. 1 foot b. 2 feet c. 3 feet d. 4 feet