Explain why heating elements in water heaters are frequently rated 250 volts for operation on 240-volt circuits.
What will be an ideal response?
To help reduce the premature burnout of heating elements, some manufacturers will supply 250-volt heating elements, yet will mark the nameplate 240 volts, with its corresponding wattage at 240 volts. This allows a safety factor if slightly higher than normal voltages are experienced.
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A wall receptacle in a bathroom must be installed within ____ inches of a bathroom basin.
a. 6 b. 12 c. 24 d. 36
Under strict safety guidelines, which of the following should be used to discharge capacitors before working on de-energized circuits?
a. A test instrument b. A hot stick c. A phasing tester d. A safety shorting probe
Upon completion of the ICE exam:
A) The names of the unsuccessful participants are published. B) The names of all the participants and whether or not they passed are published. C) The names of all the successful participants are published. D) The names of all participants and their scores are published.
Explain the difference between a Positive Temperature Coefficient (PTC) thermistor and a Negative Temperature Coefficient (NTC) thermistor.
What will be an ideal response?