Heat Pump Final Review

In order to provide time delay between stages of electric heat, the controls that are used are called ____________________.

One potential safety hazard that all technicians should be aware of when working on an electric furnace is that there are many exposed electrical connections behind the inspection panels.

• True

• False

A set of contacts actuated by a bimetal strip with a low-voltage wire wrapped around it is called a(n) ____________________.

For each watt of electrical power, ____________________ Btu/h are generated.

Which of the following elements is not a power-consuming device?

• The sequencer heater coil.

• A magnetic solenoid that moves the armature in a contactor.

• The contacts of a contactor.

• The blower motor.

If the fan were to fail and the limit switch stuck closed, the element would be cut off by the ____________________.

Radiant electric heating panels used for ceiling installation are often made of ____________________ with wire heating circuits running throughout.

If the number two contact on a package sequencer fails to close, the number three contact can still close.

• True

• False

In order to prevent a duct-mounted electric heater from being energized when the fan is not on, a(n) ____________________ should be used.

An electric heating unit that utilizes ductwork to distribute the heated air is classified as a ____.

• natural-convection heater

• forced-convection heater

• forced-draft conductor

• radiant heater