Electrical Inspector/ Electrical {National Electrical Code} Competency Study Guide Comprehensive Resource To Help You Ace Exams Includes Frequently Tested Questions With ELABORATED 100% Correct COMPLETE SOLUTIONS Guaranteed Pass First Attem

Electrical Inspector/ Electrical {National Electrical Code} Competency Study Guide Comprehensive Resource To Help You Ace Exams Includes Frequently Tested Questions With ELABORATED 100% Correct COMPLETE SOLUTIONS Guaranteed Pass First Attempt!! Current Update!! 1. Electrical wiring in a house is direct current. True False - Correct Answer: The statement is FALSE. Electrical wiring in a house is alternating current. 2. All of the following are common outdoor wiring problems except A) NMW wiring used outdoors. B) wires running through downspouts. C) unprotected wires within four feet of the garage floor. D) garage door openers powered with an extension cord. - Correct Answer: The answer is NMW WIRING USED OUTDOORS. NMW wire used outdoors is not a problem. 3. Twist-on connectors (wire nuts) are also called - Correct Answer: The answer is ARE ALSO CALLED SOLDERLESS CONNECTORS. Wire nuts are also called solderless connectors. 4. Problems with aluminum wiring include all of the following except A) aluminum is softer than copper and easier to damage. B) the aluminum oxide is not a good conductor of electricity. C) it lacked a ground wire. D) it tends to creep. - Correct Answer: The answer is IT LACKED A GROUND WIRE. Lacking a ground wire is not a common problem with aluminum wire. 5. The service size is determined by the amperage and voltage ratings of the service. True False - Correct Answer: The statement is TRUE. The size of the electrical service is a function of both the voltage and amperage. 6. The power available in a typical 15A, 120V household circuit is - correct answer is 1800W. P = VI, P = 120 × 15 = 1,800 watts. 7. Which of the following is a safety issue? A) The main fuses have a higher rating than the service entrance wire. B) The main fuses have a lower rating than the service entrance wire. C) The service box has a higher rating than the service entrance wire. D) The distribution panel has a larger rating than the service entrance wire - Correct Answer: The answer is THE MAIN FUSES HAVE A HIGHER RATING THAN THE SERVICE ENTRANCE WIRE. If the main fuses have a higher rating than the service entrance wire, they will not shut off the electricity when the current levels become dangerous. Fire and electrical shock are possible in this situation. 8. All of these are common branch circuit problems except a) undersized wire. b) damaged wires. c) open splices. d) NMD wires run through floor joists without tubes or grommets. - Correct Answer: The answer is NMD WIRES RUN THROUGH FLOOR JOISTS WITHOUT TUBES OR GROMMETS. NMD wires run through floor joists without tubes or grommets are not a problem. 9. Which of the following is not an approved grounding method? a) Metallic underground water piping b) Ground rods c) Gas piping d) Metal frame of a building - Correct Answer: The answer is GAS PIPING. Gas piping is not an approved grounding method. 10. Knob-and-tube wiring issues include all of the following except a) wires buried in insulation. b) overheated neutrals on multi-wire branch circuits. c) connections to modern wire not in boxes. d) brittle wire, insulation, or sheathing. - Correct Answer: The answer is OVERHEATED NEUTRALS ON MULTI-WIRE BRANCH CIRCUITS. Overheated neutrals on multi-wire branch circuits are not specific to knob and tube wiring. Multi-wire branch circuits are, in fact, very rare on knob and tube wiring. 11. Grounded and grounding conductors must be connected at - Correct Answer: The answer is THE SERVICE PANEL ONLY. Grounded and grounding conductors must be connected at the service panel only. 12. Cables within six feet of an access attic hatch should be - Correct Answer: The answer is PROTECTED FROM MECHANICAL DAMAGE. Cables within six feet of an access attic hatch should be protected from mechanical damage. 13. Putting a penny in a fuse holder is dangerous because - Correct Answer: The answer is THE CIRCUIT HAS NO OVER-CURRENT PROTECTION. Putting a penny in a fuse holder means that the circuit has no over-current protection. 14. You plug your circuit tester into an outlet that has a washing machine plugged in. Your tester shows the outlet is properly wired and grounded. How could you improve this inspection process? - Correct Answer: The answer is UNPLUG THE WASHING MACHINE. Unplugging the washing machine will ensure that your tester doesn't read a false ground connection through the washing machine. 15. The main service fuses have been installed with the labels facing backward, not allowing you to read their rating. No other markings are visible. You should - Correct Answer: The answer is REPORT THAT THE MAIN SERVICE FUSE RATING WAS NOT DETERMINABLE. You should report that the main service fuse rating was not determinable if you can't read the fuse labels.