ExamView - 1st yr 1st Semester Review 2020.tst - IECRM - Surface 3

Please enable JavaScript to view the full PDF

Name: ________________________ Class: ___________________ Date: __________ ID: A 1st yr 1st Semester Review 2020 Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. A wire nut is used to connect a grounding conductor that enters a box to another grounding conductor that exits the box. Then a pigtail is connected under the wire nut and goes to a receptacle in the box. For calculating conductor fill, these grounding conductors count as ___ conductor(s). a. 2 b. 0 c. 3 d. 1 ____ 2. Among those shown below, which is the smallest permitted to contain one three-way switch, an external-type MC connector, and one 12 AWG ground? Only one cable enters the box and all conductors connect to the switch. a. 2.75" deep switch box d. 31/2" deep masonry box b. 21/8" deep handy box e. none of these is large enough c. 1 /4" deep 4"-SQ with 2.2 in p-ring 1 3 ____ 3. Refer to the legend and partial circuit plan shown below. If all the cables entering the lighting fixture box were 10-2 MC cable (this cable always contains an insulated ground), what is the shallowest 4" octagonal metal box that could be used? The MC cables will be connected to the box using external connectors. There are NO cable clamps within this box. The fixture canopy can easily hold the 16 AWG fixture wires so these do NOT need to be counted. a. 11/4 b. 11/2 c. 21/8 d. none of these Figure 115.103 ____ 4. Refer to partial circuit plan shown in Figure 115.103. You are required to size the box that will contain a split-wired receptacle. If the cables entering this box were all #12 MC cables, what is the smallest 4" square (1900) metal box that could be used here? The box will have a 1 1/4"-rise plaster ring installed that adds a volume of 7.6 in3 to the total volume. The MC cables will be connected to the box using external connectors. There are NO cable clamps within this box. Hint: don’t forget to count the wires for the device and the ground(s) that are in the MC cable. a. 11/4 b. 11/2 c. 21/8 d. none of these 1 Name: ________________________ ID: A Figure 115.104 ____ 5. Refer to Figure 115.104. The minimum volume required for this box is ___ in 3. The Type NM cables each contain grounds. The “pigtails” to the receptacle are #12 wires. As you can see, the cable connectors are external (outside the box). A flat (0.0 in3 volume) p-ring is used. a. 21.0 b. 29.25 c. 20.25 d. 25.5 e. 27.75 ____ 6. How many 10 AWG conductors may be installed in a 4 11/16 ? 21/8" square box? a. 24 b. 21 c. 18 d. 16 ____ 7. Using a wire nut, a neutral that enters a box is connected to another neutral that exits the box. A pigtail is also connected under the wire nut and goes to a receptacle in the box. This pigtail ___ counted in the box fill calculation per 314.16(B)(1). a. is b. is not ____ 8. According to NEC® box fill requirements, which of the following boxes is the smallest permitted to be used for one receptacle, four 12 AWG conductors, two cable clamps and two 12 AWG ground conductors? a. 3 ? 2 ? 2.75 device box c. 4 square ? 1.5 box b. 4 ? 1.5 octagon box d. 4 ? 21/8 ? 21/8 handy box ____ 9. What is the total cubic inch capacity of three 3" ? 2" ? 21/2" device boxes ganged together? a. 45 b. 63 c. 54 d. 42 e. 37.5 ____ 10. According to the NEC®, what size box is required for ten 14 AWG conductors? a. 4 ? 11/4 square c. 3 ? 2 ? 31/2 device b. 3 ? 2 ? 2 device d. 4 ? 11/2 square ____ 11. Which of the boxes or box assemblies is permitted to contain a 50-amp, 120/240-volt, 1Ø, 4-wire receptacle and its 6 AWG copper THHN/THWN circuit wiring? A ground wire will be run from the receptacle and bonded to the metal outlet box. A single “drop” of EMT has been connected to the box and does not contain an EGC. This is the only outlet connected to the circuit. I. 3" ? 2" ? 31/2" device (switch) box II. 4" ? 21/8" square box with a 3.2 cu. in. 1-gang plaster ring III. 4" ? 21/8" square box with a 5.1 cu. in. 2-gang plaster ring a. II or III only c. III only e. none of these b. I or III only d. I or II or III 2 Name: ________________________ ID: A ____ 12. Although a box has been selected to meet the minimum volume requirements of the NEC ®, the box may be too small to accommodate the device installation without damage to the wiring. ___ in the NEC ® addresses this potential problem. a. Section 314.24 c. Section 314.19 b. Nothing d. Section 406.2 Figure 116.201 ____ 13. Refer to the legend and partial wiring plan in Figure 116.201. The wiring method used is 10 AWG wire installed in EMT. A separate equipment grounding conductor is not required for this installation. A 4 11/16 ? 11/4 inch square metal box with a 2-gang plaster ring is to be installed as the box assembly. The minimum cubic inch capacity of the plaster ring that will be installed on the box is ___ inch. a. 10.5 b. 6.0 c. 2.0 d. 13.5 e. flat (or 0.0) ____ 14. Refer to the legend and partial wiring plan in Figure 116.201. The wiring method used is 14 AWG wire installed in EMT. A separate equipment grounding conductor is not required for this installation. A 4 ? 1 1/2 inch square metal box with a 2-gang plaster ring is to be installed as the box assembly. The minimum cubic inch capacity of the plaster ring that will be installed on the box is ___ inch. a. 1.0 b. 5.0 c. 10.5 d. 7.0 e. flat (or 0.0) ____ 15. The maximum number of 12 AWG conductors that are permitted to be installed in a 4 11/16 ? 11/2 square box is ___. a. 21 b. 11 c. 13 d. 18 e. 16 Figure 116.203 ____ 16. The switch box shown in Figure 116.203 will contain a duplex receptacle. One “hot,” one neutral, and one EGC enter the box through each of the conduits. These are spliced in the box with wire nuts and “pigtails” are connected to the receptacle. All wires are 12 AWG copper THHN/THWN. The shallowest switch box permitted for this installation is ___ inches deep. a. 21/4 b. 31/2 c. 2 d. 21/2 e. 23/4 ____ 17. Refer to the legend and partial circuit plan shown here. If all the cables entering the luminaire box were 12-2 MC (this cable always contains an insulated ground), what is the shallowest 4" octagonal metal box that could be used? The MC cables will be connected to the box using external connectors. There are NO cable clamps within this box. The fixture canopy can easily hold the 16 AWG fixture wires so these do NOT need to be counted. a. 11/4 b. 11/2 c. 21/8 d. none of these 3 Name: ________________________ ID: A ____ 18. As used in the NEC®, SPD is an acronym for ___. a. Separate Portable Disconnect c. Surge Protective Device b. Special Process Determination d. Stationary Position Dimensions ____ 19. What is the ampacity of 10 AWG THWN/THHN copper wire in a 63°C environment? a. 26 A b. 30 A c. 11.55 A d. 40 A e. 35 A AP1-109.02.070_link ____ 20. A #12 THHN/THWN copper conductor, where the ambient temperature is 120°F, has an adjusted ampacity of ___. a. 22.5 b. 18.75 c. 24.6 d. 20.5 e. none of these ____ 21. A #12-3 THHN/THWN copper BX (AC cable) is installed in an attic where the air temperature is 154°F. In the attic, these 12 AWG conductors can carry ___ amps. a. 20 b. 17.4 c. 14.5 d. 30 e. 25 AP1-110.01.024_link ____ 22. How many volts are dropped in the circuit conductors in a 120-volt circuit consisting of #12-2 with ground Type AC (Armored Cable or BX)? The load connected to the circuit draws 12 amps and the distance from the panel to the load is 160 feet? (Use K=12) a. 7.06 b. 4.44 c. 3.6 d. 6.0 e. 14.11 ____ 23. The specifications require that you limit the voltage drop on any circuit to 2.5%. For a 208-volt circuit, this means that the voltage applied to any load cannot be less than ___ volts. a. 2.5 b. 208 c. 202.8 d. 205.5 e. 240 Figure 115.315 Two identical (same voltage and power ratings) heating elements are connected to a 2-pole 208-volt circuit breaker as shown. ____ 24. Refer to the pictorial circuit shown in Figure 115.315. If the leads of a voltmeter were placed on L2 on the upper element and L1 on the lower element, the meter should indicate ___ volts. a. 240 b. 120 c. 0 d. 208 e. 104 4 Name: ________________________ ID: A Figure 115.317 The duct heater contains two heating elements that are connected as shown. Each of the two elements is rated to deliver 1850 watts when operated at 125 volts. ____ 25. See Figure 115.317. This is a ___ circuit. a. parallel b. series Figure 115.333 Each heating element has the same power and voltage ratings as the other three. ____ 26. Refer to the pictorial circuit shown in Figure 115.333. If 22 amps of current is flowing between T1 and T2 then ___ amps of current will be flowing through the wire connected to the upper terminal on the 2-pole circuit breaker. a. 0 b. 11 c. 5.5 d. 44 e. 22 Figure 115.335 The circuit breaker is installed in a 120/240-volt, 3Ø, 4-wire panelboard. The heating elements are equally rated (same power and voltage). ____ 27. Refer to the pictorial circuit shown in Figure 115.335. If the leads of a voltmeter were placed on T2 and T3, the meter should indicate ___ volts. a. 240 b. 120 c. 0 d. 208 e. 104 5 Name: ________________________ ID: A Figure 115.343 ____ 28. Refer to Figure 115.343. What is the total power consumed by the duct heater when connected to the 480-volt circuit? a. 3686 b. 4000 c. 3200 d. 4167 e. 1875 ____ 29. When a metal outlet box has a clamp or connector, the maximum distance permitted between the box and the first strap in a NM cable installation is ___ inches. a. 12 b. 18 c. 54 d. 8 AP1-107.03.036_link ____ 30. What is the resistance of an incandescent lamp if the manufacturer supplies the following information: 60 watts 130 volts a. 281.6667 b. 2.1667 c. 240 d. 27.6923 e. 5.2623 AP1-107.03.052_link ____ 31. What is the current drawn by a 71/4" circular saw if the nameplate supplies the following information and it is operated at 110 volts: 10 amps 120 volts a. 9.1667 b. 12 c. 34.7951 d. 10.9545 e. 10 ____ 32. An AFCI breaker is used because it detects ___. a. over voltage on a circuit b. an imbalance between hot and neutral current c. an arcing condition d. low voltage in a circuit ____ 33. Section ___ in the NEC® has a requirement that dwelling receptacles be installed so that no point measured horizontally along the floor line of any wall space is more than 1.8 m (6 ft) from a receptacle outlet. a. 210.52(B)(3) c. 210.52(C)(1) e. 210.52(A)(2)(2) b. 210.52(A)(3) d. 210.52(A)(1) ____ 34. Section ___ in the NEC® requires that, for determining receptacle placement in dwellings, a wall space includes the space occupied by fixed panels in walls but excludes sliding panels. a. 210.52(B)(3) c. 210.52(C)(1) e. 210.52(A)(2)(2) b. 210.52(A)(3) d. 210.52(A)(1) 6 Name: ________________________ ID: A ____ 35. Section ___ in the NEC® states that, for dwellings: “Receptacle outlets in or on floors shall not be counted as part of the required number of receptacle outlets unless located within 450 mm (18 in.) of the wall.” a. 210.52(B)(3) c. 210.52(C)(1) e. 210.52(A)(2)(2) b. 210.52(A)(3) d. 210.52(A)(1) ____ 36. Section ___ in the NEC® states that, for dwellings: “Receptacles installed in a kitchen to serve countertop surfaces shall be supplied by not fewer than two small-appliance branch circuits, either or both of which shall also be permitted to supply receptacle outlets in the same kitchen and in other rooms specified in 210.52(B)(1).” a. 210.52(B)(3) c. 210.52(C)(1) e. 210.52(A)(2)(2) b. 210.52(A)(3) d. 210.52(A)(1) ____ 37. A circuit is to be run to a parking lot light. The blueprints call for you to run 8 AWG wire that has a diameter of .128 inches. However, you ran #10 wire that has a diameter of .116 inches. You have ___ the total circuit resistance. a. increased b. not changed c. decreased ____ 38. 100°F = ___°C a. 80 b. 73 c. 212 d. 38 e. 43 ____ 39. 32°F = ___°C a. 100 b. 32 c. 18 d. 0 e. –14 ____ 40. Section ___ of the NEC® states that arc-fault interrupters shall be installed in 15- and 20-amp circuits serving dwelling bedrooms. a. 210.52(A) b. 210.63 c. 210.28 d. 210.12(A) Figure 107.458 ____ 41. A 3-gang masonry box is shown in Figure 107.458. It will have several PVC conduits connected to it. An equipment grounding conductor will be pulled into each PVC. The box will contain three 4-way switches. Twelve “travelers” are pulled into the box along with two other circuit conductors. All conductors are 12 AWG copper THHN/THWN. The box must have a minimum volume of ___ in 3. a. 38.25 b. 47.25 c. 40.5 d. 36 e. 45 ____ 42. Which of the boxes or box assemblies is permitted to contain a 30-amp, 120/240-volt, 1Ø, 4-wire receptacle and its 10 AWG copper THHN/THWN circuit wiring and ground wire? A single “drop” of EMT has been connected to the box. The Equipment Grounding Conductor is installed in the EMT. This is the only outlet connected to the circuit. I. 3" ? 2" ? 31/2" device (switch) box II. 4" ? 11/2" square box with a 3.2 cu. in. 1-gang plaster ring III. 4" ? 11/2" square box with a 5.1 cu. in. 2-gang plaster ring a. II or III only c. III only e. none of these b. I or III only d. I or II or III 7 Name: ________________________ ID: A Figure 117.107 ____ 43. Refer to Figure 117.107 to determine the number of wires entering the box. RMC (rigid metal conduit) with 10 AWG wire is the wiring method used. An equipment grounding conductor will not be installed. A 4-gang masonry box will be used for the switches. The minimum depth of the box is ___ inches. a. 21/4 b. 21/2 c. 2 d. 31/2 e. 23/4 Wall-to-wall kitchen Figure 117.305 dimensions are 9 ft by 9 ft ____ 44. Refer to the plan view for a residential kitchen shown in Figure 117.305. Receptacle(s) ___ must be GFCI protected. I. 13 II. 2 a. both I & II b. I only c. neither I nor II d. II only ____ 45. GFCI protection ___ for 125-volt, single phase, 20-ampere receptacles located in airport bathrooms. a. is required b. is NOT required ____ 46. Luminaires that are installed on the outside of an office building under a covered entryway are permitted to be marked as suitable for ___ locations. I. wet II. damp III. dry a. II only c. I, II, or III e. I only b. I or II only d. III only f. II or III only ____ 47. A 500,000-circular mil cable is composed of how many strands? a. 37 b. 19 c. 1 d. 61 e. 7 ____ 48. The maximum number of 130-watt, fluorescent luminaires that can be connected to a 20-Amp, 277-volt circuit is ___. This load is noncontinuous. a. 53 b. 18 c. 34 d. 42 ____ 49. Where loads are likely to be ON for 8 hours, the computed load for sizing branch-circuit conductors and OCPDs must be calculated by multiplying the actual load times ___%. a. 80 b. 100 c. 125 d. 150 8 Name: ________________________ ID: A Figure 112.060 ____ 50. Refer to Figure 112.060. The lamp will be “ON” with the three-way switches in the positions shown in Diagram(s) ___. a. I only c. III & IV only e. II only b. II & IV only d. I & III only 9 ID: A 1st yr 1st Semester Review 2020 Answer Section MULTIPLE CHOICE 1. ANS: D 2020 NEC: 314.16(B)(5) PTS: 1 REF: 2020 NEC: 314.16(B)(5) OBJ: Obj 115.2 Worksheet NAT: Obj 115.2 ABank LOC: AP1-115.01.026 TOP: Box Fill 2. ANS: A device conductors + circuit conductors + EGC = 2 + 3 + 1 = 6  13.5 in3 2.75" deep switch box has a volume of 14.0 in3  smallest 11/4" deep 4"-SQ with 2.2 in3 p-ring has a volume of 20.2 in3 21/8" deep handy box has a volume of 14.5 in3 31/2" deep masonry box has a volume of 21.0 in3 2020 NEC: 314.16 PTS: 1 REF: 2020 NEC: 314.16 NAT: Obj 115.2 ABank LOC: AP1-115.01.027 TOP: Box Fill MSC: Special Characters: 222 (double-rt-arrow) 3. ANS: D [4 cables ? 2 wires] ÷ 1 EGC = 9 #10s  none of these is large enough 2020 NEC: 314.16(A) | 2020 NEC: 314.16(B) PTS: 1 REF: 2020 NEC: 314.16 NAT: Obj 115.2 ABank LOC: AP1-115.01.029 TOP: Box Fill MSC: 115.NEC.003.eps | Special Characters: 222 (double-rt-arrow) 4. ANS: A 2 wires for the 12-2 cable + 6 wires for the two 12-3 cables + 1 wire for the EGCs + 2 wires for the device = 11 #12 wires  11 ? 2.25 in3 = 24.75 in3 If a 4" ? 11/4" box is used, the volume is 18.0 + 7.6 = 25.6 in3  this box/ring combo is big enough. 2020 NEC: 314.16 PTS: 1 REF: 2020 NEC: 314.16 NAT: Obj 115.2 ABank LOC: AP1-115.01.032 TOP: Box Fill MSC: Special Characters: 222 (double-rt-arrow) | Narr: Figure_115.103.eps 1 ID: A 5. ANS: D 2 wires for the 10-2 cable = 2 ? 2.5 = 5 in3 + 6 wires for the two 12-3 cables = 6 ? 2.25 = 13.53 + 1 wire for the largest EGC = 2.5 in3 + 2 wires for the device = 4.5 in3 5 + 13.5 + 2.5 + 4.5 = 25.5 in3 2020 NEC: 314.16 PTS: 1 REF: 2020 NEC: 314.16 NAT: Obj 115.2 ABank LOC: AP1-115.01.034 TOP: Box Fill MSC: Special Note: Tabs for Addition | Narr: Figure_115.104.eps 6. ANS: D 2020 NEC: 314.16(A) (Table) PTS: 1 REF: 2020 NEC: 314.16(A) (Table) NAT: Obj 106.6 ABank LOC: AP1-107.05.040 TOP: Box Fill 7. ANS: B 2020 NEC: 314.16(B)(1) PTS: 1 REF: 2020 NEC: 314.16(B)(1) OBJ: Obj 106.6 Worksheet NAT: Obj 106.6 ABank LOC: AP1-107.05.046 TOP: Box Fill 8. ANS: C device conductors + circuit conductors + clamp conductor + EGC = 2 + 4 + 1 + 1 = 8 2020 NEC: 314.16 PTS: 1 REF: 2020 NEC: 314.16 NAT: Obj 106.6 ABank LOC: AP1-107.05.047 TOP: Box Fill 9. ANS: E 2020 NEC: 314.16(A) (Table) PTS: 1 REF: 2020 NEC: 314.16(A) (Table) OBJ: Obj 106.6 Worksheet NAT: Obj 106.6 ABank LOC: AP1-116.02.016 TOP: Box Fill 10. ANS: D 2020 NEC: 314.16(A) (Table) PTS: 1 REF: 2020 NEC: 314.16(A) (Table) NAT: Obj 116.2 ABank LOC: AP1-129.02.015 TOP: Box Fill 11. ANS: C 3 circuit conductors + one 2-gang device = 3 + (2 x 2) = 7 conductors SUM = 7 x 5.0 = 35 cu. inches required 2020 NEC: 314.16 PTS: 1 REF: 2020 NEC: 314.16 NAT: Obj 116.2 ABank LOC: AP1-123.01.020 TOP: Box Fill 2 ID: A 12. ANS: A 2020 NEC: 314.24 PTS: 1 REF: 2020 NEC: 314.24 OBJ: Obj 116.2 Worksheet NAT: Obj 116.2 ABank LOC: AP1-120.01.027 TOP: Box Fill 13. ANS: C 7 circuit conductors + two devices = 7 + (2 x 2) = 11 conductors SUM = 11 x 2.5 = 27.5 cu. inches required 27.5 – 25.5 = 2.0 cu. in. is the minimum volume of the p-ring 2020 NEC: 314.16(B) | 2020 NEC: 314.16(A) (Table) PTS: 1 REF: 2020 NEC: 314.16(B) | 2020 NEC: 314.16(A) (Table) OBJ: Obj 116.2 Worksheet NAT: Obj 116.2 ABank LOC: AP1-116.02.001 TOP: Box Fill MSC: Narr: Figure_116.201.eps 14. ANS: A 7 circuit conductors + two devices = 7 + (2 x 2) = 11 conductors SUM = 11 x 2.0 = 22 cu. inches required 22 – 21 = 1.0 cu. in. is the minimum volume of the p-ring 2020 NEC: 314.16(B) | 2020 NEC: 314.16(A) (Table) PTS: 1 REF: 2020 NEC: 314.16(B) | 2020 NEC: 314.16(A) (Table) NAT: Obj 116.2 ABank LOC: AP1-116.02.006 TOP: Box Fill MSC: Narr: Figure_116.201.eps 15. ANS: C 2020 NEC: 314.16(A) (Table) PTS: 1 REF: 2020 NEC: 314.16(A) (Table) OBJ: Obj 116.2 Worksheet NAT: Obj 116.2 ABank LOC: AP1-116.02.009 TOP: Box Fill 16. ANS: B [4 CCCs] + [1 EGC] + [2 for device] = 7 7 x 2.25 in 3 = 15.75 in3  31/2 in. deep will work 2020 NEC: 314.16(B) | 2020 NEC: 314.16(A) (Table) PTS: 1 REF: 2020 NEC: 314.16(B) | 2020 NEC: 314.16(A) (Table) OBJ: Obj 116.2 Worksheet NAT: Obj 116.2 ABank LOC: AP1-116.02.017 TOP: Box Fill MSC: Special Characters: 222 (double-rt-arrow) | Narr: Figure_116.203.eps 17. ANS: C [4 cables ? 2 wires] + 1 EGC = 9 #12s  21/8" deep box 2020 NEC: 314.16(A) (Table) PTS: 1 REF: 2020 NEC: 314.16(A) (Table) NAT: Obj 116.2 ABank LOC: AP1-115.NEC.003 TOP: Box Fill MSC: 115.NEC.003.eps | Special Characters: 222 (double-rt-arrow) 3 ID: A 18. ANS: C 2020 NEC: 285.1 PTS: 1 REF: 2020 NEC: 285.1 NAT: Obj 113.4 ABank LOC: AP1-113.03.002 TOP: SPD 19. ANS: A Table 310.15(B)(16), in 90-degree column: CF from T.310.15(B)(2)(a) =.65 then: 40 ? .65 = 26 2020 NEC: 310.15(B)(2)(a) (Table) | 2020 NEC: 310.15(B)(16) (Table) PTS: 1 REF: 2020 NEC: 310.15(B)(2)(a) (Table) | 2020 NEC: 310.15(B)(16) (Table) NAT: Obj 109.2 ABank LOC: AP1-109.02.043 TOP: Ampacity Correction 20. ANS: C ampacity = [30] x .82 = 24.60 amps 2020 NEC: 310.15(B)(16) (Table) | 2020 NEC: 310.15(B)(2)(a) (Table) PTS: 1 REF: 2020 NEC: 310.15(B)(16) (Table) | 2020 NEC: 310.15(B)(2)(a) (Table) NAT: Obj 109.2 ABank LOC: AP1-109.02.066 TOP: Ampacity Correction 21. ANS: B ampacity = [30] x .58 = 17.4 amps 2020 NEC: 310.15(B)(16) (Table) | 2020 NEC: 310.15(B)(2)(a) (Table) PTS: 1 REF: 2020 NEC: 310.15(B)(16) (Table) | 2020 NEC: 310.15(B)(2)(a) (Table) NAT: Obj 109.2 ABank LOC: AP1-109.02.086 TOP: Ampacity Correction 22. ANS: A Vd = 2KIL ÷ cma = (2 ? 12 ? 12 ? 160) ÷ 6530 = 7.0567 volts PTS: 1 REF: Obj 110.1 Reading Assignment NAT: Obj 110.1 ABank | Obj TH-104.4 ABank LOC: AP1-110.01.023 TOP: Voltage Drop K-Method KEY: Drop in Ckt 23. ANS: C 208 – (208)(.025) = 202.8 volts PTS: 1 REF: Obj 110.1 Reading Assignment OBJ: Obj 110.1 Worksheet NAT: Obj 110.1 ABank | Obj TH-104.4 ABank LOC: AP1-110.01.033 TOP: Voltage Drop K-Method KEY: % Drop in Ckt 24. ANS: C PTS: 1 REF: Obj 115.3 Reading Assignment NAT: Obj 115.3 ABank | Obj TH-104.1 ABank LOC: AP1-115.03.035 TOP: Series Circuits KEY: E measure MSC: Narr: Figure_115.315.eps | Special Narr Note: Keep Arial 9 font 4 ID: A 25. ANS: B PTS: 1 REF: Obj 115.3 Reading Assignment OBJ: Obj 115.3 Worksheet NAT: Obj 115.3 ABank | Obj TH-104.1 ABank LOC: AP1-115.03.041 TOP: Series Circuits KEY: Ckt ID MSC: Narr: Figure_115.317.eps | Special Narr Note: Keep Arial 9 font 26. ANS: E PTS: 1 REF: Obj 115.3 Reading Assignment NAT: Obj 115.3 ABank | Obj TH-104.1 ABank LOC: AP1-115.03.062 TOP: Series Circuits KEY: Find: I MSC: Narr: Figure_115.333.eps | Special Narr Note: Keep Arial 9 font 27. ANS: C PTS: 1 REF: Obj 115.3 Reading Assignment NAT: Obj 115.3 ABank | Obj TH-104.1 ABank LOC: AP1-115.03.067 TOP: Series Circuits KEY: E measure MSC: Narr: Figure_115.335.eps | Special Narr Note: Keep Arial 9 font 28. ANS: A R1 = R2 = R3 = R4 = [Erated]2 ÷ Prated = [125]2 ÷ 1000 = 15.625 ohms RT = R1 + R2 + R3 + R4 = 15.625 × 4 = 62.5 ohms I = Ea ÷ RT = 480 ÷ 62.5 = 7.68 amps PT = I2 × RT = [7.68]2[62.5]= 3686.4 watts PTS: 1 REF: Obj 116.4 Reading Assignment OBJ: Obj 116.4 Worksheet NAT: Obj 116.4 ABank LOC: AP1-116.04.088 TOP: Series Circuits KEY: Find: P @ not rated E MSC: Narr: Figure_115.343.eps 29. ANS: A 2020 NEC: 334.30(A) PTS: 1 REF: 2020 NEC: 334.30(A) OBJ: Obj 109.3 Worksheet NAT: Obj 109.3 ABank LOC: AP1-109.03.016 TOP: Securing & Supporting KEY: Cables: Type NM 30. ANS: A R = [Erated]2 ÷ Prated = 1302 ÷ 60 = 281.6667 ohms PTS: 1 REF: Obj 106.3 Reading Assignment NAT: Obj 106.3 ABank | Obj TH-103.2 ABank LOC: AP1-107.03.035 TOP: Ohm's Law 31. ANS: A R = Erated ÷ Irated = 120 ÷ 10 = 12 ohms then: I = Ea ÷ R = 110 ÷ 12 = 9.167 amps PTS: 1 REF: Obj 106.3 Reading Assignment OBJ: Obj 106.3 Worksheet NAT: Obj 106.3 ABank | Obj TH-103.2 ABank LOC: AP1-107.03.051 TOP: Ohm's Law 32. ANS: C 2020 NEC: 100_Arc-Fault Circuit Interrupter PTS: 1 REF: 2020 NEC: 100_Arc-Fault Circuit Interrupter | Obj 113.2 Reading Assignment OBJ: Obj 113.2 Worksheet NAT: Obj 113.2 ABank LOC: AP1-113.02.001 TOP: AFCI 5 ID: A 33. ANS: D PTS: 1 REF: 2020 NEC: 210.52(A)(1) NAT: Obj 108.2 ABank LOC: AP1-102.04.113 TOP: Use of NEC 34. ANS: E PTS: 1 REF: 2020 NEC: 210.52(A)(2)(2) OBJ: Obj 108.2 Worksheet NAT: Obj 108.2 ABank LOC: AP1-102.04.114 TOP: Use of NEC 35. ANS: B PTS: 1 REF: 2020 NEC: 210.52(A)(3) OBJ: Obj 108.2 Worksheet NAT: Obj 108.2 ABank LOC: AP1-102.04.115 TOP: Use of NEC 36. ANS: A PTS: 1 REF: 2020 NEC: 210.52(B)(3) OBJ: Obj 108.2 Worksheet NAT: Obj 108.2 ABank LOC: AP1-102.04.116 TOP: Use of NEC 37. ANS: A PTS: 1 REF: Obj 105.3 Reading Assignment OBJ: 105 Reading WS NAT: Obj 105.3 ABank | Obj TH-102.1 ABank LOC: AP1-105.03.003 TOP: Resistance 38. ANS: D [100 – 32] × (5 ÷ 9) = 38°C PTS: 1 REF: Obj 105.2 Reading Assignment NAT: Obj 105.2 ABank | Obj TH-101.2 ABank LOC: AP1-105.02.007 TOP: Conversions & Metric Prefixes 39. ANS: D [32 – 32] × (5 ÷ 9) = 0°C PTS: 1 REF: Obj 105.2 Reading Assignment NAT: Obj 105.2 ABank | Obj TH-101.2 ABank LOC: AP1-105.02.009 TOP: Conversions & Metric Prefixes 40. ANS: D 2020 NEC: 210.12(A) PTS: 1 REF: 2020 NEC: 210.12(A) NAT: Obj 113.4 ABank LOC: AP1-113.02.011 TOP: AFCI 41. ANS: B [14 CCCs] + [3 ? 2 for devices] + [1 for EGC] = 21 each 12 AWGs 21 ? 2.25 in3 = 47.25 in3 2020 NEC: 314.16 | 2020 NEC: 314.16(B) (Table) PTS: 1 REF: 2020 NEC: 314.16 | 2020 NEC: 314.16(B) (Table) NAT: Obj 106.6 ABank LOC: AP1-107.05.053 TOP: Box Fill MSC: Narr: Figure_107.458.eps 42. ANS: D 3 circuit conductors + one device + 1 EGC = 3 + (1 x 2) + 1 = 6 conductors SUM = 6 x 2.5 = 15 cu. inches required (minimum calc for 1 yoke) 2020 NEC: 314.16 PTS: 1 REF: 2020 NEC: 314.16 NAT: Obj 116.2 ABank LOC: AP1-120.01.024 TOP: Box Fill 6 ID: A 43. ANS: D 16 circuit conductors and four devices = 4 x 2 = 8 conductors SUM = 24 x 2.5 = 60 cu. inches required 60 ÷ 4 = 15 cu. in. is the minimum volume of ONE box  A 31/2" deep box has a volume of 21 in3 while a 21/2" deep box has only 14 in3 2020 NEC: 314.16(B) | 2020 NEC: 314.16(A) (Table) PTS: 1 REF: 2020 NEC: 314.16(B) | 2020 NEC: 314.16(A) (Table) NAT: Obj 117.1 ABank LOC: AP1-117.01.042 TOP: Box Fill MSC: Special Characters: 222 (double-rt-arrow) | Narr: Figure_117.107.eps 44. ANS: A 2020 NEC: 210.8(A)(6) PTS: 1 REF: 2020 NEC: 210.8(A)(6) NAT: Obj 117.3 ABank LOC: AP1-117.03.036 MSC: Narr: Figure_117.305.eps 45. ANS: A 2020 NEC: 210.8(B)(1) PTS: 1 REF: 2020 NEC: 210.8(B)(1) NAT: Obj 113.4 ABank LOC: AP1-113.04.036 46. ANS: B 2020 NEC: 410.10(A) PTS: 1 REF: 2020 NEC: 410.10(A) NAT: Obj 117.2 ABank LOC: AP1-117.02.011 47. ANS: A PTS: 1 REF: 2020 NEC: Ch 9-T. 8 NAT: Obj 109.1 ABank LOC: AP1-109.01.019 TOP: Conductors - Dimensions 48. ANS: D Pckt = I E = 20 A × 277 V = 5540 W #luminaire/ckt = [5540 W] ÷ [130 W/luminaire] = 42.6154 luminaire  42 fixtures PTS: 1 REF: Obj 108.4 Reading Assignment OBJ: Obj 108.4 Worksheet NAT: Obj 108.4 ABank LOC: AP1-108.04.019 TOP: Circuit Loading MSC: Special Characters: downwards arrow 49. ANS: C 2020 NEC: 314.16 PTS: 1 REF: 2020 NEC: 210.20(A) NAT: Obj 109.2 ABank LOC: AP1-129.03.001 50. ANS: D PTS: 1 REF: Obj 112.3 Reading Assignment NAT: Obj 112.3 ABank LOC: AP1-112.04.098 TOP: 3way Sw Operation MSC: Narr: Figure_112.060.eps 7