Electric Furnace and Components

An electric furnace uses forced ___________ to distribute air warmed by electric heating elements.

• Induction

• heat

• Convection

• electric

Electrical requirements can be found on the furnace wiring diagram or ________________.

• internet

• installation manual

• they are all the same

• rating tag

Feeder wires must be enclosed in rigid metal or flexible ___________.

• Conduit

• galvanized pipe

• black pipe

Electric heating elements have built in __________ to electric flow.

• heater

• resistance

• sequencers

• limit switches

The amount of resistance on an electric heating element are determined by its __________ and diameter

• size

• material

• ceramic insulators

• length

Electric heating elements have ceramic insulators to prevent a ___________.

• fire

• short circuit

• heating issue

• problem

Electric heating elements are usually sized at ________ kw.

• 5

• 10

• 15

• 20

Heat output of electric heating elements is ______ Btu per watt.

• 3.7

• 3.415

• 10

• 5.415

A limit switch _____________ a heating element if the temperature exceeds the switch's rating.

• activates

• helps

• de-energizes

• turns on

a fusible link protects heating elements against a burn out if the __________ fails.

• limit

• themostat

• sequencer

• relay