IEC FIRST YEAR EXAM STUDY WITH
QUESTIONS AND WELL VERIFIED
ANSWERS [GRADED A+] ACTUAL
EXAM 100%
What is the result if the neutral wire becomes open on a multiwire
circuit having unequal loads? - ANS✔✔---The load of higher
resistance would overheat and probably be damaged.
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. - ANS✔✔---150
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? - ANS✔✔---Because a higher
voltage will be applied, 120-volt equipment could be destroyed.
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) ___. - ANS✔✔---
is 1.2 kW
- ANS✔✔---
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 ___. - ANS✔✔-
--24 in.
An extension ladder should extend ___ feet above the top of the
building and be secured. - ANS✔✔---3ft.
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. - ANS✔✔---$9.00
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 ___. -
ANS✔✔---240.15(B)(1)
___ can be described as the point of demarcation between where
the serving utility ends and the premises wiring begins. -
ANS✔✔---Service Point
QUESTIONS AND WELL VERIFIED
ANSWERS [GRADED A+] ACTUAL
EXAM 100%
What is the result if the neutral wire becomes open on a multiwire
circuit having unequal loads? - ANS✔✔---The load of higher
resistance would overheat and probably be damaged.
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. - ANS✔✔---150
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? - ANS✔✔---Because a higher
voltage will be applied, 120-volt equipment could be destroyed.
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) ___. - ANS✔✔---
is 1.2 kW
- ANS✔✔---
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 ___. - ANS✔✔-
--24 in.
An extension ladder should extend ___ feet above the top of the
building and be secured. - ANS✔✔---3ft.
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. - ANS✔✔---$9.00
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 ___. -
ANS✔✔---240.15(B)(1)
___ can be described as the point of demarcation between where
the serving utility ends and the premises wiring begins. -
ANS✔✔---Service Point
