ELECTRICAL: NEC LEVEL 4, ENTIRE
SECOND SEMESTER {LATEST 2026 -2027
update} QUESTIONS AND ANSWERS 100%
CORRECT
How are future service connections handled when installing heat tracing on domestic
hot-water supply systems? - correct answer A service loop of extra heating cable is
provided at connections.
The temperature at which a liquid first condenses when vapor is cooled is known as
the _____. - correct answer dew point
According to NEC Article 424, embedded floor heating cable may be spliced with _____.
- correct answer splices identified in the manufacturer's instructions
,Self-regulating cables are referred to as _____. - correct answer parallel resistance
heating cables
As the temperature surrounding a self-regulating heating cable decreases, the _____. -
correct answer electrical resistance decreases
On a roof de-icing system, secure cables to each other using _____. - correct answer
UV-resistant cable ties
The component labeled 1 in the figure above is a(n) _____. - correct answer power
connection
The component labeled 7 in the figure above is a(n) _____. - correct answer end seal
,Which of the following best describes continuity monitoring? - correct answer Verifies
that voltage is present at the end termination of a heat-tracing cable run
To transmit information, systems using power-line carrier technology make use of
_____. - correct answer wiring
Which of the following may be used to detect unusual bearing noise during rundown
when the motor is powered down? - correct answer Stethoscope
An autotransformer is one of the methods used to _____. - correct answer reduce
startup current
Bearing misalignment within a motor can result when one or two of the mounting feet
of a motor are spaced away from an uneven mounting surface and are then anchored
, down against the surface without proper shimming. This condition is referred to as
_____. - correct answer soft foot
Which of the following factors affects the frequency and thoroughness of motor
maintenance and testing? - correct answer nature of service
Which of the following is used to check the rotating speeds of motors? - correct
answer Tachometer
NEMA's usual service conditions include a frequency variation of not more than what
percentage of the nameplate frequency? - correct answer 5%
The useful life of a squirrel cage induction motor depends largely upon the condition of
its _____. - correct answer insulation
SECOND SEMESTER {LATEST 2026 -2027
update} QUESTIONS AND ANSWERS 100%
CORRECT
How are future service connections handled when installing heat tracing on domestic
hot-water supply systems? - correct answer A service loop of extra heating cable is
provided at connections.
The temperature at which a liquid first condenses when vapor is cooled is known as
the _____. - correct answer dew point
According to NEC Article 424, embedded floor heating cable may be spliced with _____.
- correct answer splices identified in the manufacturer's instructions
,Self-regulating cables are referred to as _____. - correct answer parallel resistance
heating cables
As the temperature surrounding a self-regulating heating cable decreases, the _____. -
correct answer electrical resistance decreases
On a roof de-icing system, secure cables to each other using _____. - correct answer
UV-resistant cable ties
The component labeled 1 in the figure above is a(n) _____. - correct answer power
connection
The component labeled 7 in the figure above is a(n) _____. - correct answer end seal
,Which of the following best describes continuity monitoring? - correct answer Verifies
that voltage is present at the end termination of a heat-tracing cable run
To transmit information, systems using power-line carrier technology make use of
_____. - correct answer wiring
Which of the following may be used to detect unusual bearing noise during rundown
when the motor is powered down? - correct answer Stethoscope
An autotransformer is one of the methods used to _____. - correct answer reduce
startup current
Bearing misalignment within a motor can result when one or two of the mounting feet
of a motor are spaced away from an uneven mounting surface and are then anchored
, down against the surface without proper shimming. This condition is referred to as
_____. - correct answer soft foot
Which of the following factors affects the frequency and thoroughness of motor
maintenance and testing? - correct answer nature of service
Which of the following is used to check the rotating speeds of motors? - correct
answer Tachometer
NEMA's usual service conditions include a frequency variation of not more than what
percentage of the nameplate frequency? - correct answer 5%
The useful life of a squirrel cage induction motor depends largely upon the condition of
its _____. - correct answer insulation
