Commercial Wiring Ch.6-10 Exam
Questions & Answers (Grade A+)
How is a raceway defined by the NEC? -
correct answer ✅as a channel that is designed and used expressly
for the purpose of holding wires, cables, or busbars. (Art. 100)
How is the thickness of the wall of E.M.T. described? -
correct answer ✅It's a thin-wall metal raceway
EMT *can/cannot* be threaded. -
correct answer ✅Cannot
The compression fittings for EMT are classified as ______ tight and
_______ tight types. -
correct answer ✅raintight; concrete-tight
What kind of raceways are used to connect recessed or lay-in
luminaires?
What do electricians refer to this as? -
correct answer ✅Flexible metal and nonmetallic conduit ; fixture
whip
What is LFNC? -
correct answer ✅Liquidtight Flexible Nonmetallic Conduit
, Commercial Wiring Ch.6-10 Exam
Questions & Answers (Grade A+)
What has a smooth seamless inner core and cover bonded together
and having one or more reinforcement layers between the core and
covers for a layered conduit? -
correct answer ✅LFNC-A
How is voltage drop in a circuit calculated? -
correct answer ✅By multiplying the current flow(I) times the
impedance (Z) Ed = I X Z
How can you demonstrate proof of the flux cancellation principle? -
correct answer ✅By using a clamp-on ammeter
In the trade, conduit bodies are often referred to as ______ and
______. -
correct answer ✅Condulets and Unilets
What are the two most popular types of PVC? -
correct answer ✅Schedule 40 & Schedule 80
Which PVC is allowed to be aboveground where subject to physical
damage? and which is not? -
Questions & Answers (Grade A+)
How is a raceway defined by the NEC? -
correct answer ✅as a channel that is designed and used expressly
for the purpose of holding wires, cables, or busbars. (Art. 100)
How is the thickness of the wall of E.M.T. described? -
correct answer ✅It's a thin-wall metal raceway
EMT *can/cannot* be threaded. -
correct answer ✅Cannot
The compression fittings for EMT are classified as ______ tight and
_______ tight types. -
correct answer ✅raintight; concrete-tight
What kind of raceways are used to connect recessed or lay-in
luminaires?
What do electricians refer to this as? -
correct answer ✅Flexible metal and nonmetallic conduit ; fixture
whip
What is LFNC? -
correct answer ✅Liquidtight Flexible Nonmetallic Conduit
, Commercial Wiring Ch.6-10 Exam
Questions & Answers (Grade A+)
What has a smooth seamless inner core and cover bonded together
and having one or more reinforcement layers between the core and
covers for a layered conduit? -
correct answer ✅LFNC-A
How is voltage drop in a circuit calculated? -
correct answer ✅By multiplying the current flow(I) times the
impedance (Z) Ed = I X Z
How can you demonstrate proof of the flux cancellation principle? -
correct answer ✅By using a clamp-on ammeter
In the trade, conduit bodies are often referred to as ______ and
______. -
correct answer ✅Condulets and Unilets
What are the two most popular types of PVC? -
correct answer ✅Schedule 40 & Schedule 80
Which PVC is allowed to be aboveground where subject to physical
damage? and which is not? -
