ELECTRICAL NEC LEVEL 4 MIDTERM/FINAL EXAM (2nd
Semester) WITH 170 QUESTIONS & VERIFIED CORRECT
ANSWERS (100%) | ALREADY GRADED A+ | ELECTRICAL
NEC LEVEL 4 EXAM (NEW!)
1. When performing load calculations for farm buildings, the load that must be
included in the calculation at 100% demand must be at least _____. -
ANSWER-60A
2. The minimum ampacity for a feeder supplying ten 30A shore power
receptacles in a marina is _____. - ANSWER-120A
10 x 30A x 120V = 36,000VA
36,000VA x 0.8 = 28,800VA
28,000VA ÷ 240V = 120A
3. The smallest size locking and grounding type receptacle that may be used to
provide shore power for boats is _____ - ANSWER-30A
4. Refer to Figure 1. What is the total load a feeder serving four 2hp motors,
three 5hp motors, one 15hp motor, and one 25hp motor? All motors are
208V. - ANSWER-219.8A
5. Use of the 100' tap rule is limited to installation in high-bay manufacturing
buildings with wall heights over _____. - ANSWER-35 feet
6. What is the load for 40 non-dwelling unit receptacles? (Assume that the load
is not continuous.) - ANSWER-7,200VA
180VA per receptacle x 40 receptacles = 7,200VA
,7. The interior lighting load for a school building with 175,000 square feet of
floor space is _____. - ANSWER-525,000VA
175,000 ft2 x 3VA/ft2 = 525,000VA
8. NEC Table 220.12 requires a minimum general lighting load for office
buildings to be based on _____. - ANSWER-3-1/2 VA/ft2
9. What is the feeder ampacity for a three-phase, 120/208V subpanel with a
connected load of 84,563VA? - ANSWER-235A
I = VA ÷ (V x √3) = 84,563VA ÷ (208V x 1.732) = 235A
10.A farm has three buildings with loads of 82A, 65A and 15A. What is the
total demand load? Assume that there are no dwellings or motors, and each
building is an independent single load. - ANSWER-117A
(82A x 1) + (60A x 0.5) + [(5A +15A) x 0.25] = 82A + 30A + 5A = 117A
11.Using the VA/linear foot method, the total VA that must be used in a service
calculation for a 50' show window is _____. - ANSWER-12,500VA
200VA per linear foot x 50' = 10,000VA
10,000VA x 1.25 = 12,500VA
12.Before it is considered a continuous load, a load must operate for at least
how many hours without interruption? - ANSWER-3
13.When making service calculations for multi-family dwellings, additional
demand factors must be applied to the portion of the neutral load greater
than _____. - ANSWER-200A
, 14.In most cases, feeder conductor size is adjusted when _____. - ANSWER-
there are more than three current-carrying conductors in the raceway
15.The rules governing the design of circuits supplying power to boats is
covered in _____. - ANSWER-NEC Article 555
16.When calculating the service requirement for a particular building, the first
step is to _____. - ANSWER-determine the floor area of the building
17.If a store lighting load is 14,000VA (continuous), which of the following
must be used for the circuit calculation? - ANSWER-17,500VA
1.25 x 14,000VA = 17,500VA
18.A commercial kitchen with more than six pieces of kitchen equipment is
subject to a demand factor of _____. - ANSWER-65%
19.Which of the following lighting loads would be used in a residence that is
1,650 ft2? - ANSWER-4,950VA
1,650 x 3VA per square foot = 4,950VA
20.The demand lighting load for a 20,000 ft2 motel with no dining room or
ballroom is _____. - ANSWER-18,000VA
Demand lighting load = 2VA/ft2 x 20,000VA = 40,000VA
First 20,000 VA x 50% = 10,000VANext 20,000 VA x 40% = 8,000 VA Total
Load = 18,000VA
Semester) WITH 170 QUESTIONS & VERIFIED CORRECT
ANSWERS (100%) | ALREADY GRADED A+ | ELECTRICAL
NEC LEVEL 4 EXAM (NEW!)
1. When performing load calculations for farm buildings, the load that must be
included in the calculation at 100% demand must be at least _____. -
ANSWER-60A
2. The minimum ampacity for a feeder supplying ten 30A shore power
receptacles in a marina is _____. - ANSWER-120A
10 x 30A x 120V = 36,000VA
36,000VA x 0.8 = 28,800VA
28,000VA ÷ 240V = 120A
3. The smallest size locking and grounding type receptacle that may be used to
provide shore power for boats is _____ - ANSWER-30A
4. Refer to Figure 1. What is the total load a feeder serving four 2hp motors,
three 5hp motors, one 15hp motor, and one 25hp motor? All motors are
208V. - ANSWER-219.8A
5. Use of the 100' tap rule is limited to installation in high-bay manufacturing
buildings with wall heights over _____. - ANSWER-35 feet
6. What is the load for 40 non-dwelling unit receptacles? (Assume that the load
is not continuous.) - ANSWER-7,200VA
180VA per receptacle x 40 receptacles = 7,200VA
,7. The interior lighting load for a school building with 175,000 square feet of
floor space is _____. - ANSWER-525,000VA
175,000 ft2 x 3VA/ft2 = 525,000VA
8. NEC Table 220.12 requires a minimum general lighting load for office
buildings to be based on _____. - ANSWER-3-1/2 VA/ft2
9. What is the feeder ampacity for a three-phase, 120/208V subpanel with a
connected load of 84,563VA? - ANSWER-235A
I = VA ÷ (V x √3) = 84,563VA ÷ (208V x 1.732) = 235A
10.A farm has three buildings with loads of 82A, 65A and 15A. What is the
total demand load? Assume that there are no dwellings or motors, and each
building is an independent single load. - ANSWER-117A
(82A x 1) + (60A x 0.5) + [(5A +15A) x 0.25] = 82A + 30A + 5A = 117A
11.Using the VA/linear foot method, the total VA that must be used in a service
calculation for a 50' show window is _____. - ANSWER-12,500VA
200VA per linear foot x 50' = 10,000VA
10,000VA x 1.25 = 12,500VA
12.Before it is considered a continuous load, a load must operate for at least
how many hours without interruption? - ANSWER-3
13.When making service calculations for multi-family dwellings, additional
demand factors must be applied to the portion of the neutral load greater
than _____. - ANSWER-200A
, 14.In most cases, feeder conductor size is adjusted when _____. - ANSWER-
there are more than three current-carrying conductors in the raceway
15.The rules governing the design of circuits supplying power to boats is
covered in _____. - ANSWER-NEC Article 555
16.When calculating the service requirement for a particular building, the first
step is to _____. - ANSWER-determine the floor area of the building
17.If a store lighting load is 14,000VA (continuous), which of the following
must be used for the circuit calculation? - ANSWER-17,500VA
1.25 x 14,000VA = 17,500VA
18.A commercial kitchen with more than six pieces of kitchen equipment is
subject to a demand factor of _____. - ANSWER-65%
19.Which of the following lighting loads would be used in a residence that is
1,650 ft2? - ANSWER-4,950VA
1,650 x 3VA per square foot = 4,950VA
20.The demand lighting load for a 20,000 ft2 motel with no dining room or
ballroom is _____. - ANSWER-18,000VA
Demand lighting load = 2VA/ft2 x 20,000VA = 40,000VA
First 20,000 VA x 50% = 10,000VANext 20,000 VA x 40% = 8,000 VA Total
Load = 18,000VA
