C10 T Exam QUESTIONS WITH ANSWERS

C10 T Exam QUESTIONS WITH ANSWERS
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Question #: 1: When troubleshooting a motor capacitor, the
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meter pegs to the right and stays there. What does this indicate?
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- CORRECT ANSWERS ✔✔Correct answer: bad capacitor
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Additional Notes: If the capacitor were good, the needle would
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peg to the right, then slowly drop back down.
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Question #: 2: On a 480 V, three-phase blower motor with
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auxiliary contacts and indicators, the push button start is off due
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to a thermal overload. What is the most likely cause? - CORRECT
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ANSWERS ✔✔Correct answer: overloaded motor |\ |\ |\ |\




When installing a fire alarm system bell or horn, how far above
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grade should it be mounted? - CORRECT ANSWERS ✔✔7'-6"
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Additional Notes: The top of the device should be at least 7'-6"
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above the finished floor and at least 6" below the finished ceiling.
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If the ceiling height is too low to allow the recommended
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mounting heights, the device can be mounted at a lower height,
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or on the ceiling.
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What is the minimum length of a grounding rod? - CORRECT
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ANSWERS ✔✔8' |\




When testing a GFCI trip, probe conductor and fixture ground,
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use: - CORRECT ANSWERS ✔✔inductive voltage tester
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,On a walk-through of a new home, the owner wants you to install
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an outlet beside the stove. The counter top is 48" long and the
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wall is 6' away. The contractor - CORRECT ANSWERS ✔✔would
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need to install 2 outlets
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What is the maximum allowed gap allowed around a box in a wall
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finished with drywall? - CORRECT ANSWERS ✔✔Correct answer:
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1/8" |\




Additional Notes: Plaster, drywall, or plasterboard surfaces must |\ |\ |\ |\ |\ |\ |\ |\


not have gaps or open spaces greater than 1/8" at the edge of a
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box or fitting.
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What is the minimum number of branch circuits required at each
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patient bed location? - CORRECT ANSWERS ✔✔Correct answer:
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two; one from the emergency electrical system and the other
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from the normal system
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When can you have an isolated ground passing through a panel
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without connecting it to that panel's equipment grounding
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terminal bar? - CORRECT ANSWERS ✔✔Correct answer: when you
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are reducing vibration and noise on the ground
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Additional Notes: When installing an isolated ground receptacle |\ |\ |\ |\ |\ |\ |\ |\


the insulated equipment grounding conductor is run with the
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circuit conductors directly back to the main service disconnect.
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Metal boxes and raceways must still be grounded.
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Which of the following could cause a significant increase to the
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bid amount on a job at an automotive repair shop? - CORRECT
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ANSWERS ✔✔Correct answer: the service pit is inadequately |\ |\ |\ |\ |\ |\ |\ |\


ventilated

, Additional Notes: The entire area of repair garages, up to a level |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


of 18" above the floor, are Class I, Division 2, locations. Any
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depression below floor level (such as a service pit) is also a Class |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


I, Division 2, location unless it is unvented in which case it may
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be considered a Class I, Division 1, location and require special
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fittings.


What would you use in a capacitive reactance circuit to balance
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the circuit? - CORRECT ANSWERS ✔✔inductor
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Which of the following NEMA rating should be used for temporary
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construction power enclosures outside? - CORRECT ANSWERS
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✔✔Correct answer: NEMA 3R |\ |\ |\ |\




Additional Notes: Enclosures with a NEMA rating of 3R is |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


designed for indoor or outdoor use. Enclosures with ratings of 1,
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2, or 12 are designed for indoor use only.
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What is the full-load current rating of a 208-volt, 50-horsepower,
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three-phase squirrel-cage motor? - CORRECT ANSWERS |\ |\ |\ |\ |\ |\


✔✔Correct answer: 103 amps |\ |\ |\ |\




Additional Notes: To find the amperage of a three-phase motor |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


when you know the horsepower you use a variation of Watt's
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Law: |\




I = (horsepower x 746 watts/horsepower) / (E x 1.73)
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I = (50 hp x 746 watts/hp) / (208 volts x 1.73) = 37,300 watts /
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360 volts = 103 amps |\ |\ |\ |\