Exam 30: Electric Heat

Electric baseboard heaters are classified as ____ .

The limit switch is used on the electric element assembly to ____.

Where in a room are electric baseboard heaters normally placed ?

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

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

The benefits of electric baseboard heating are that ____ .

How is the formula Q_S = 1.08 × cfm × TD often called ?

A 10 Kw heating element, operating on rated 240 V, will generate ____ Btu/h .

Any unit heater designed to have air forced across the element should not be operated without the ____ operating .

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

Some units may be designed to move enough air across the heating elements so that they do not glow.

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

The resistance wire used in electric heating elements is usually ____.

Why aren't contactors used in residential and small commercial electric heating units?

Generally speaking, electric heat is very efficient but can be more expensive to operate compared to oil and gas .

Explain the difference between a "pictorial" diagram and a "schematic."

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

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

Where are unit and wall electric heaters typically mounted ?

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