IEC FIRST YEAR EXAM STUDY SET |
GUARANTEED ACCURATE
ANSWERS
What is the result if the neutral wire becomes open on a multiwire circuit
having unequal loads? - ACCURATE ANSWERS✔✔ The load of
higher resistance would overheat and probably be damaged.
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 ___. - ACCURATE ANSWERS✔✔
240.15(B)(1)
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. -
ACCURATE ANSWERS✔✔ 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? - ACCURATE
, ANSWERS✔✔ 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) ___. - ACCURATE ANSWERS✔✔ is
1.2 kw
- ACCURATE ANSWERS✔✔
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 ___. - ACCURATE ANSWERS✔✔ 24 in.
An extension ladder should extend ___ feet above the top of the building
and be secured. - ACCURATE ANSWERS✔✔ 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. - ACCURATE
ANSWERS✔✔ $9.00
___ can be described as the point of demarcation between where the
serving utility ends and the premises wiring begins. - ACCURATE
ANSWERS✔✔ Service Point
GUARANTEED ACCURATE
ANSWERS
What is the result if the neutral wire becomes open on a multiwire circuit
having unequal loads? - ACCURATE ANSWERS✔✔ The load of
higher resistance would overheat and probably be damaged.
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 ___. - ACCURATE ANSWERS✔✔
240.15(B)(1)
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. -
ACCURATE ANSWERS✔✔ 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? - ACCURATE
, ANSWERS✔✔ 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) ___. - ACCURATE ANSWERS✔✔ is
1.2 kw
- ACCURATE ANSWERS✔✔
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 ___. - ACCURATE ANSWERS✔✔ 24 in.
An extension ladder should extend ___ feet above the top of the building
and be secured. - ACCURATE ANSWERS✔✔ 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. - ACCURATE
ANSWERS✔✔ $9.00
___ can be described as the point of demarcation between where the
serving utility ends and the premises wiring begins. - ACCURATE
ANSWERS✔✔ Service Point
