HVAC Servcing Test 2 (Week 5)

How much heat energy is in 1 watt of electrical energy? 

• 3.413

• 4.1

• 5.2

• 6.3

Select all safety devices in a electric furnace?

• Fusible link

• High limit switch

• Thermostat

• Fan relay

Select all control devices in a electric furnace?

• Fan relay

• High limit switch

• Contactor

• Sequencer 

What control component starts the heat strips on a typical electric heat furnace?

• sequencer

• relay

• contactor

• capacitor

Electric heating elements are rated in which of the following terms:

• kW

• Btu/hr

• gal/hr

• therms

A kW is equal to:

• 1000w

• 1200w

• 500w

• 10,000w

. The individual heater wire size is dependent on which of the following:

• voltage

• current

• kilowatt

• horsepower

The kW rating of an electric heater measures the

• temperature range

• power rating

• voltage rating

• name of the power company

Low-voltage controls are used for which of the following reasons?

• less expensive

• easier to troubleshoot

• safety

• both A and C

. Electric heat is supposed to glow red hot in the airstream.

• True

• False