Page |1
IEC FIRST YEAR EXAM 2025| BRAND NEW
ACTUAL EXAM WITH 100% VERIFIED
QUESTIONS AND CORRECT SOLUTIONS|
GUARANTEED VALUE PACK| ACE YOUR
GRADES.
1. What is the result if the neutral wire becomes open on a multiwire circuit
having unequal loads? - correct answer - The load of higher resistance
would overheat and probably be damaged.
2. 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 ___. - correct answer - 240.15(B)(1)
3. Refer to the panel schedule shown in Figure 128.231. If the neutral is
removed from the neutral bar, ___ volts will be applied to the TV. -
correct answer - 150
4. A 12/3 cable is installed from a 120/240-V, 1Ø panel and feeds a split-
wired duplex receptacle. One "hot" is connected to a 20A breaker in
panel space 1. The second "hot" is connected to a 20A breaker in space
3. A 16-amp load is connected to the upper receptacle and a 14-amp
load is connected to the lower receptacle. Which of the following will
happen if the neutral is removed from the receptacle? - correct answer -
, Page |2
Because a higher voltage will be applied, 120-volt equipment could be
destroyed.
5. Refer to Figure 129.106. With the equipment energized and the power
used by the element connected at T3 & T4 is 0.3kw, the power used by
the equipment (all 4 elements) ___. - correct answer - is 1.2 kw
6. 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 ___. - correct answer - 24 in.
7. An extension ladder should extend ___ feet above the top of the building
and be secured. - correct answer - 3ft.
8. What is the monthly energy cost to operate a 250-watt high-pressure
sodium lamp? Electricity costs $0.15 per kw-hr and the lamp will be ON
for 8 hours per day. There are 30 days in a billing month. - correct
answer - $9.00
9. ___ can be described as the point of demarcation between where the
serving utility ends and the premises wiring begins. - correct answer -
Service Point
IEC FIRST YEAR EXAM 2025| BRAND NEW
ACTUAL EXAM WITH 100% VERIFIED
QUESTIONS AND CORRECT SOLUTIONS|
GUARANTEED VALUE PACK| ACE YOUR
GRADES.
1. What is the result if the neutral wire becomes open on a multiwire circuit
having unequal loads? - correct answer - The load of higher resistance
would overheat and probably be damaged.
2. 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 ___. - correct answer - 240.15(B)(1)
3. Refer to the panel schedule shown in Figure 128.231. If the neutral is
removed from the neutral bar, ___ volts will be applied to the TV. -
correct answer - 150
4. A 12/3 cable is installed from a 120/240-V, 1Ø panel and feeds a split-
wired duplex receptacle. One "hot" is connected to a 20A breaker in
panel space 1. The second "hot" is connected to a 20A breaker in space
3. A 16-amp load is connected to the upper receptacle and a 14-amp
load is connected to the lower receptacle. Which of the following will
happen if the neutral is removed from the receptacle? - correct answer -
, Page |2
Because a higher voltage will be applied, 120-volt equipment could be
destroyed.
5. Refer to Figure 129.106. With the equipment energized and the power
used by the element connected at T3 & T4 is 0.3kw, the power used by
the equipment (all 4 elements) ___. - correct answer - is 1.2 kw
6. 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 ___. - correct answer - 24 in.
7. An extension ladder should extend ___ feet above the top of the building
and be secured. - correct answer - 3ft.
8. What is the monthly energy cost to operate a 250-watt high-pressure
sodium lamp? Electricity costs $0.15 per kw-hr and the lamp will be ON
for 8 hours per day. There are 30 days in a billing month. - correct
answer - $9.00
9. ___ can be described as the point of demarcation between where the
serving utility ends and the premises wiring begins. - correct answer -
Service Point
