COMMERCIAL AND INDUSTRIAL WIRING FINAL
EXAM QUESTIONS AND ANSWERS|LATEST
2025/2026|GRADED A+
Reinforced thermosetting resin conduit RTRC is made from _______ reinforced epoxy. -
ANSWER- Fiberglass
______ is a lightweight tubular steel raceway without threads on the ends. - ANSWER-
EMT
Conductor fill cannot exceed _______ percent underfloor raceways. - ANSWER- 40
Rigid metal conduit must be securely fastened in place with supports a minimum of every
_______'. - ANSWER- 10
For three or more conductors installing conduit, the maximum fill rate is _______ percent. -
ANSWER- 40
FMC must be securely fastened with _______ inches of each box, cabinet, conduit body, or
point at which the FMC it terminates. - ANSWER- 12
An _______ bend is a
Bend conduit made perpendicular to the original length of the conduit, with the conduit
extending a specified length from back of the bend - ANSWER- 90 Degree
Per the only NEC, ENT has restrictions as to its use ______ floors above grade. - ANSWER-
Three
Most nonmetallic raceways are constructed of ______. - ANSWER- Polyvinyl chloride
(PVC)
, A ________ is a die that is of a certain size and used to fit inside a ratchet handle. - ANSWER-
Drop head die
Unless otherwise marked, LFMC is limited to an operating temperature of ________ degrees
Fahrenheit and ________ C. - ANSWER- 140;60
Protector caps are colored _______ for RMC sizes 3/4 an 1 1/4 - ANSWER- Red
______ conduit is nonmetallic and intended for encasement in concrete in any location. -
ANSWER- Type A PVC
Surface raceway is typically used with lighting, power, and signal circuits of ________ volts
and less - ANSWER- 300
A _____ Cable tray that has vertical side rails with evenly spaced horizontal rungs. -
ANSWER- Ladder
A ______ is an enclosed channel for routing and placing electrical conductors and cables. -
ANSWER- Raceway
Conduit nipples have a maximum fill rate of ______ percent of their cross-sectional area. -
ANSWER- 60
_______ conduit is particularly resistant to moisture in corrosive environments. - ANSWER-
HDPE
________ cable trays are typically use for low-voltage and low power applications where
access to cables as required after installation. - ANSWER- Single rail
EXAM QUESTIONS AND ANSWERS|LATEST
2025/2026|GRADED A+
Reinforced thermosetting resin conduit RTRC is made from _______ reinforced epoxy. -
ANSWER- Fiberglass
______ is a lightweight tubular steel raceway without threads on the ends. - ANSWER-
EMT
Conductor fill cannot exceed _______ percent underfloor raceways. - ANSWER- 40
Rigid metal conduit must be securely fastened in place with supports a minimum of every
_______'. - ANSWER- 10
For three or more conductors installing conduit, the maximum fill rate is _______ percent. -
ANSWER- 40
FMC must be securely fastened with _______ inches of each box, cabinet, conduit body, or
point at which the FMC it terminates. - ANSWER- 12
An _______ bend is a
Bend conduit made perpendicular to the original length of the conduit, with the conduit
extending a specified length from back of the bend - ANSWER- 90 Degree
Per the only NEC, ENT has restrictions as to its use ______ floors above grade. - ANSWER-
Three
Most nonmetallic raceways are constructed of ______. - ANSWER- Polyvinyl chloride
(PVC)
, A ________ is a die that is of a certain size and used to fit inside a ratchet handle. - ANSWER-
Drop head die
Unless otherwise marked, LFMC is limited to an operating temperature of ________ degrees
Fahrenheit and ________ C. - ANSWER- 140;60
Protector caps are colored _______ for RMC sizes 3/4 an 1 1/4 - ANSWER- Red
______ conduit is nonmetallic and intended for encasement in concrete in any location. -
ANSWER- Type A PVC
Surface raceway is typically used with lighting, power, and signal circuits of ________ volts
and less - ANSWER- 300
A _____ Cable tray that has vertical side rails with evenly spaced horizontal rungs. -
ANSWER- Ladder
A ______ is an enclosed channel for routing and placing electrical conductors and cables. -
ANSWER- Raceway
Conduit nipples have a maximum fill rate of ______ percent of their cross-sectional area. -
ANSWER- 60
_______ conduit is particularly resistant to moisture in corrosive environments. - ANSWER-
HDPE
________ cable trays are typically use for low-voltage and low power applications where
access to cables as required after installation. - ANSWER- Single rail
