IEC YEAR 1 FINAL EXAM STUDY WITH 100% CORRECT ANSWERS 2024 LATEST UPDATE.

What is the result if the neutral wire becomes open on a multiwire circuit having unequal loads? Select one: a. The load of higher resistance would overheat and probably be damaged. b. The load of lesser resistance would overheat and probably be damaged. c. No effect until one load is turned off or opens. d. No effect. The load of higher resistance would overheat and probably be damaged. Refer to Figure 128.202. ___ volts are applied across the water heater element. Select one: a. 120 b. 240 c. 0 d. 480 240 Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:00 Full screen Circuits 7 and 9 share a neutral. This is a multiwire branch circuit. If Ckt. 7 is drawing 13 amps and Ckt. 9 is drawing 16 amps, how much current is flowing in the neutral? Select one: a. 3 b. 13 c. 29 d. 16 3 The Code reference that specifies the type of disconnecting means (circuit breaker for example) that can be used on a multiwire branch circuit that feeds devices mounted on the same yoke [a stack switch or a duplex receptacle for example] is ___. Note: Select N/A (not applicable) if there is not an NEC® requirement. Select one: a. Article 100 b. 240.15(B)(1) c. 404.8(A) d. N/A 240.15(B)(1) Voltmeters are connected in ___ with the load when used to measure voltage across a load in a circuit. Select one: a. parallel b. series Parallel The neutral has been broken in the circuit shown in Figure 128.418. The current through Lamp F (IF) with the neutral opened is ___ amps. Select one: a. 6 b. 1 c. 2 d. 8 e. 3 1 Refer to Figure 128.523. Each battery puts out 12 volts. The voltage applied to the load is ___ volts. Select one: a. 48 b. 0 c. 24 d. 36 e. 12 24 What is the minimum number of receptacles required in an unfinished basement? Select one: a. 2 b. 4 c. 1 d. 0 1 What part of the NEC® is a reference for calculating conduit fill where all conductors are the same size? Select one: a. Article 100 b. Table 310.15(B)(16) c. Annex C d. Table 314.16(A) Annex C From NEC® Table 8 in Ch 9, the overall diameter of a 1/0 bare stranded copper conductor is ___ inches. Select one: a. .1855 b. .074 c. .372 d. .486 e. .109 .372 Eleven #12, five #10, and six #6 THHN/THWN conductors will be installed in a run of EMT. The smallest trade size EMT you can use is ___. Select one: a. 11/2 b. 21/2 c. 1-1/4 d. 2 e. 1 1-1/4 The number of conductors permitted in 80 PVC is specified in Table ___. Select one: a. 310.15(B)(16) b. 310.13 c. 347.2 d. C.10, Annex C C.10, Annex C A short length of EMT is run between two panels. The ampacity values for the conductors in this EMT need not be derated, as long as the length of the EMT does not exceed ___. Select one: a. 12 inches b. 18 inches c. 24 inches 24 inches ___ can be described as the point of demarcation between where the serving utility ends and the premises wiring begins. Select one: a. Service point b. Attachment c. Mast service d. Lateral Service point Which term best describes a service lateral? Select one: a. underground feed b. overhead drop c. service ground d. service entrance Underground feed How many kW does a 100-ampere residential service draw when fully loaded? Select one: a. 10 kW b. 240 kW c. 100 kW d. 24 kW 24 kW If a 95-watt lamp operates for 11 hours, the utility will bill for ___ kWh. Select one: a. 8.636 b. 10.450 c. 11.579 d. 1.045 e. 1.158 1.045 What is the monthly energy cost to operate a 200-watt high-pressure sodium lamp? Electricity costs $0.11 per kW-hr and the lamp will be ON for 12 hours per day. There are 30 days in a billing month. Select one: a. $7.92 b. $8.80 c. $15.94 d. $6.60 e. $660 $7.92 To minimize conductor insulation damage and arcing damage to electrical equipment during a ground fault or a short circuit, ___ should be minimized. Select one: a. time duration of the fault b. ampere level of the fault current c. both a and b d. neither a nor b time duration of the fault Article ___ in the NEC® covers grounding and bonding of electrical systems. Select one: a. 422 b. 424 c. 250 d. 240 e. 280 250 Self-tapping sheet metal screws (TEK screws) ___ permitted to be used to connect the equipment grounding conductor to a metal box. Select one: a. are b. are not Are not According to Article 250, a metal underground water pipe that is in direct contact with the earth for 10 ft. or more (including any metal well casing effectively bonded to the pipe) and electrically continuous (or made electrically continuous by bonding around insulating joints or insulating pipe) to the points of connection of the grounding electrode conductor and the bonding conductors would be a good ___. Select one: a. insulator b. service conductor c. grounding electrode d. neutral grounding electrode If connected to a metal water piping system, the grounding electrode conductor shall be connected at some point within the first ___ of where it enters the building. Select one: a. 25 ft (7.5 m) b. 10 ft (3.0 m) c. 5 ft (1.52 m) 5 ft (1.52 m) When determining the minimum size of a grounding electrode conductor, Table ___ is used. Select one: a. 250.122 b. 310.15(B)(16) c. 250.66 d. 314.16(A) e. none of these 250.66 The grounding blade on an attachment plug is ___ than the current-carrying conductor blades. This is to ensure that the grounding connection is made before the current-carrying conductor connections and breaks its connection after the current-carrying conductor connections (first make-last break). Select one: durable r r sh-resistant Longer An equipment grounding conductor (EGC) is the conductor that is ___. Select one: a. installed with the branch-circuit conductors in a conduit or cable run b. installed between the neutral bar and the ground bar in the service panel c. connected between the hot and cold water pipes at a water heater d. connected to the neutral bar in the service panel, the ground rod, the incoming main water service pipe, and/or the steel building structure installed with the branch-circuit conductors in a conduit or cable run Generally, an overcurrent protective device is not permitted to be continuously loaded to more than ___ percent of its rating. Select one: a. 50 b. 125 c. 100 d. 80 80