Electrical Wiring and Cables Quiz

Which of the following are bare wires used for overhead transmission lines and ground wires?

• Thermoplastic wires

• Coaxial cable

• Copper or aluminum conductors

• Flat cord

Thermoplastic Wires (Type TW) are resistant to which of the following?

• Fire, moisture, and oil

• Only fire

• Only moisture

• Water and heat

Which type of wire is flame retardant and can be used for building wiring in both dry and wet locations?

• Fiber optic cable

• Thermoplastic wire (Type TW)

• Flat cord (Type SPT)

• Power cable

A cable that carries light signals instead of electrical current is known as:

• Coaxial cable

• Fiber-optic cable

• Power cable

• Copper conductor

Flat Cord (Type SPT) is typically used for:

• High-voltage underground wiring

• Extension wiring for a single bulb and portable equipment

• Radio antenna installations

• Transmission lines

What type of cable is commonly used for radio frequency antenna installation?

• Coaxial cable

• Power cable

• Fiber-optic cable

• Thermoplastic wire

Power cables with sizes 3.36 mm - 1,000 MCM are used for voltages ranging from:

• 1-12 volts

• 220 volts

• 6,000-35,000 volts

• 100,000 volts and above

Which of the following best describes a wiring diagram?

• A tool used to measure voltage

• A simple visual representation of electrical connections and layout

• A fuse protection chart

• A manual for constructing light bulbs

Direct Current (DC) flows:

• In one direction only

• Alternately back and forth

• Randomly in both directions

• With no fixed pattern

One disadvantage of DC in long-distance transmission is:

• Low cost of production

• Excessive voltage drop and power loss

• Difficult to generate

• Unstable power supply