1|Page
2025 CEN EXAM Latest Practice Test Bank with 250
Most Common Questions with Correct Answers/
Certified Emergency Nurse – CEN Exam Prep
Newest Guide
Which Article of the NEC covers grounding? -
...ANSWER...✓✓ article 250
Which of the following is a 90 degree, explosion proof
fitting? - ...ANSWER...✓✓ GUAL
What is a dropout plate? - ...ANSWER...✓✓ Metal plate
with a curved surface for cable to follow as it passes
from the tray
All of the following are common service voltages in the
United States EXCEPT: - ...ANSWER...✓✓ 372/575 3-
PHASE, 4-WIRE
What does a GFCI breaker do? - ...ANSWER...✓✓ Opens a
circuit to prevent operation of an electrical device
,2|Page
What will happen when one or more coils in a winding are
grounded? - ...ANSWER...✓✓ The motor will automatically
blow fuses
Eight incandescent lighting fixtures are to be installed.
Each fixture is 120- volts, with a 200-watt lamp. What is
the total connected load? - ...ANSWER...✓✓ 13.3 amps
The must be grounded in a bussed gutter if used as the
main service equipment. - ...ANSWER...✓✓ Neutral
busbar
When wall mounting cable tray, ensure that -
...ANSWER...✓✓ The building structure is strong enough
to support the tray system
The purpose of sealing cable ends when reels of cable
are in storage is - ...ANSWER...✓✓ To keep moisture from
creeping in
The outer covering on liguid-tight flexible metal conduit is
used for - ...ANSWER...✓✓ A moisture seal
,3|Page
A good electrical connection should - ...ANSWER...✓✓ Be
mechanically and electrically secure
The symbol normally used for duplex - ...ANSWER...✓✓
Circle with two parallel lines drawb through it
Disconnecting means are covered in - ...ANSWER...✓✓
NEC Section 110-22
In relation to switches, the term throw refers to the -
...ANSWER...✓✓ Number of internal operations that a
switch can perform
A 3-phase, 4-wire, 480v service requires ______ current
transformer(s) - ...ANSWER...✓✓ 3
Services conductors and equipment are covered in -
...ANSWER...✓✓ NEC Article 230
The NEC required that all receptacles installed on 25 amp
and 20 amp branch circuits be ______ receptacles -
...ANSWER...✓✓ Grounding
, 4|Page
A transformer with the primary of 400 turns and a
secondary of 300 turns has a _____ - ...ANSWER...✓✓
Step-down turns ratio of 4:3
The circular mil is based on the - ...ANSWER...✓✓ Cross-
sectional area of the wire
Of the termination classes listed below, ____ is the only
one that provides a seal against external elements. -
...ANSWER...✓✓ Class 1
Unless otherwise noted. the calculations in AC circuits
_____ values. - ...ANSWER...✓✓ Rms
When the coil turns are increased the _____ -
...ANSWER...✓✓ Induced voltage is increased
As the temperature surrounding a self-regulating heating
cable rises, the ____ - ...ANSWER...✓✓ Resistance of the
polymeric core increases
2025 CEN EXAM Latest Practice Test Bank with 250
Most Common Questions with Correct Answers/
Certified Emergency Nurse – CEN Exam Prep
Newest Guide
Which Article of the NEC covers grounding? -
...ANSWER...✓✓ article 250
Which of the following is a 90 degree, explosion proof
fitting? - ...ANSWER...✓✓ GUAL
What is a dropout plate? - ...ANSWER...✓✓ Metal plate
with a curved surface for cable to follow as it passes
from the tray
All of the following are common service voltages in the
United States EXCEPT: - ...ANSWER...✓✓ 372/575 3-
PHASE, 4-WIRE
What does a GFCI breaker do? - ...ANSWER...✓✓ Opens a
circuit to prevent operation of an electrical device
,2|Page
What will happen when one or more coils in a winding are
grounded? - ...ANSWER...✓✓ The motor will automatically
blow fuses
Eight incandescent lighting fixtures are to be installed.
Each fixture is 120- volts, with a 200-watt lamp. What is
the total connected load? - ...ANSWER...✓✓ 13.3 amps
The must be grounded in a bussed gutter if used as the
main service equipment. - ...ANSWER...✓✓ Neutral
busbar
When wall mounting cable tray, ensure that -
...ANSWER...✓✓ The building structure is strong enough
to support the tray system
The purpose of sealing cable ends when reels of cable
are in storage is - ...ANSWER...✓✓ To keep moisture from
creeping in
The outer covering on liguid-tight flexible metal conduit is
used for - ...ANSWER...✓✓ A moisture seal
,3|Page
A good electrical connection should - ...ANSWER...✓✓ Be
mechanically and electrically secure
The symbol normally used for duplex - ...ANSWER...✓✓
Circle with two parallel lines drawb through it
Disconnecting means are covered in - ...ANSWER...✓✓
NEC Section 110-22
In relation to switches, the term throw refers to the -
...ANSWER...✓✓ Number of internal operations that a
switch can perform
A 3-phase, 4-wire, 480v service requires ______ current
transformer(s) - ...ANSWER...✓✓ 3
Services conductors and equipment are covered in -
...ANSWER...✓✓ NEC Article 230
The NEC required that all receptacles installed on 25 amp
and 20 amp branch circuits be ______ receptacles -
...ANSWER...✓✓ Grounding
, 4|Page
A transformer with the primary of 400 turns and a
secondary of 300 turns has a _____ - ...ANSWER...✓✓
Step-down turns ratio of 4:3
The circular mil is based on the - ...ANSWER...✓✓ Cross-
sectional area of the wire
Of the termination classes listed below, ____ is the only
one that provides a seal against external elements. -
...ANSWER...✓✓ Class 1
Unless otherwise noted. the calculations in AC circuits
_____ values. - ...ANSWER...✓✓ Rms
When the coil turns are increased the _____ -
...ANSWER...✓✓ Induced voltage is increased
As the temperature surrounding a self-regulating heating
cable rises, the ____ - ...ANSWER...✓✓ Resistance of the
polymeric core increases
