26108-20 Section 1

Multiple Choice

Which of the following is a primary function of raceways in electrical systems?

• To provide mechanical protection for conductors

• To increase electrical resistance

• To generate electricity

• To replace circuit breakers

Multiple Choice

Which of the following types of conduit has the greatest inside diameter (ID) for the same nominal outside diameter (OD)?

• EMT

• RMC

• IMC

• PVC

Multiple Select

Select all statements that are correct about EMT conduit and its fittings.

• EMT is too thin for threading.

• EMT requires setscrew or compression fittings.

• Fittings must be matched to the application.

• EMT can be threaded like RMC.

Fill in the Blanks

Compression fittings are used in ___ locations, while setscrew fittings are used in ___ locations.

Multiple Choice

Which type of conduit provides corrosion protection and requires the use of threaded fittings?

• Rigid Metal Conduit (RMC)

• Intermediate Metal Conduit (IMC)

• Flexible Metal Conduit (FMC)

• Liquidtight Flexible Nonmetallic Conduit (LFNC)

Multiple Select

Which of the following statements about PVC conduit are correct?

• PVC does not corrode.

• PVC is subject to expansion/contraction due to temperature changes.

• PVC can be used as an equipment grounding conductor.

• PVC is available in both thin and thick wall types.

Open Ended

Explain why expansion couplings are necessary when installing PVC conduit and describe the recommended support intervals for PVC conduit.

Fill in the Blanks

Liquidtight flexible nonmetallic conduit (LFNC) is used in

locations.

Multiple Choice

What is the primary application of flexible metal conduit (flex)?

• Motor connections subject to vibration

• Outdoor underground use

• Corrosion protection in chemical plants

• Supporting heavy-duty equipment

Multiple Choice

Which of the following is true about supporting flexible metal conduit?

• It must be supported within 12 inches of each connection and every 4.5 feet thereafter.

• It must be supported every 8 feet regardless of connection.

• It does not require support near connections.

• It must be supported only at the ends.

Multiple Choice

What is the primary purpose of a coupling in a conduit system?

• To join two pieces of conduit

• To insulate conductors

• To provide a waterproof seal

• To connect to a grounding conductor

Open Ended

Explain how the selection of a conduit fitting might change based on the installation location and method.

Multiple Select

Which of the following are types of metal conduit couplings?

• Three-piece coupling

• Hinged coupling

• Offset nipple

• Concrete-tight setscrew

Fill in the Blanks

Insulating bushings are used to protect conductors from being damaged by threaded conduit entering a

enclosure.

Multiple Choice

Threaded weatherproof hubs, also known as Myers hubs, are primarily used for conduit entering a box in which type of location?

• Wet location

• Dry location

• High-temperature location

• Underground location

Multiple Choice

What is the primary purpose of conduit bodies in an electrical raceway system?

• To provide junctions or pull points for conductors

• To increase the voltage in the system

• To act as a fuse for the circuit

• To reduce the cost of installation

Multiple Select

Which of the following are true about Type C conduit bodies?

• They are straight fittings with screw-on covers

• They provide a pull point in long runs

• They are used for bends totaling more than 360 degrees

• They provide a 90-degree change in direction

Multiple Choice

Which type of conduit body provides a 90-degree change in direction?

• Type C

• Type L

• Type T

• Type X

Multiple Choice

What is the main difference between Type T and Type X conduit bodies?

• Type T is used for three intersecting conduits, while Type X is used for four

• Type T is used for straight runs, while Type X is for 90-degree bends

• Type T is more expensive than Type X

• Type X is only used outdoors

Open Ended

Explain the importance of sealing fittings in hazardous locations and describe how they help maintain safety in conduit systems.

Open Ended

After learning about wireways, raceways, and fittings, what questions do you still have or what would you like to learn more about this topic?

Multiple Choice

What is one important safety precaution to take when working with wireways, raceways, and fittings?

• Wearing protective gloves

• Working with bare hands

• Ignoring safety equipment

• Using tools without inspection