HVAC Excellence - ELECTRIC HEAT, Week 1 Trade Terms

Before working on an electric furnace, the tech should _________.

• make sure that the electric power at the furnace is turned off

• review the furnace diagram

• remove all jewelry

• start the blower fan motor

A GFCI circuit breaker _________.

• energizes the 1st heating element

• closes contact points to the heater element

• detects current leaks to ground

• helps convert Watts to BTU's of power

The conductor in an electric heat element is usually made of

• Nichrome

• Silicon

• Mica

• Ceramic

An example of resistive load is a / an ___________.

• motor

• crankcase heater

• ECM

• capacitor

An example of an inductive load is a / an ___________.

• light bulb

• motor

• capacitor

• crankcase heater

An electric furnace is marked 208/230 single phase 60Hz. A tech reads 200 VAC at the power supply and determines ___________.

• the voltage is too low

• the voltage is too high

• the voltage is within the acceptable limits

• the furnace has a ground fault

Voltage imbalance between any leg of a 3 phase power supply may not exceed ____________.

• 2%

• 3%

• 4%

• 5%

The limit switch on an electric furnace is a / an __________.

• manual reset switch

• automatic reset switch

• heat anticipator

• Nichrome conductor

The sequencer timers on electric heater will usually energize the 1st heating element after a time delay of _________.

• 1 to 30 seconds

• 30 to 60 seconds

• 60 to 90 seconds

• 90 to 120 seconds

The amount of BTUs produced by 1 Watt of electricity is _______.

• 2 BTUs

• 3.413 BTUs

• 208 BTUs

• 746 BTUs