The resistance wire used in electric heating elements is usually _____________?
Nickel Chromium
Radiant heat is transferred by _________?
Infrared Rays
Quartz and glass panel electric units are classified as _______?
Radiant Heaters
The benefits of electric baseboard heating that _________.?
They are inexpensive to install
They operate on a 24-V Power Supply
Electric baseboard heaters are classified as ________?
Natural-Convection Heaters
Any unit heater designed to have air forced across the element should not be operated without the __________ operating?
Fan
An electric heating unit that utilizes ductwork to distribute the heated air is classified as a _________?
Forced-Convection Heater
The limit switch is used on the electric element assembly to _______?
Shuts off the unit if high temperature occurs
Define Limit Switch
designed to stop a piece of equipment before it does damage to itself or the surroundings, for example, a high limit on a furnace or a amperage limit on a motor.
Which of the following elements is not a power-consuming device?
The contacts of the contactor
A 10 Kw heating element, operating on rated 240 V, will generate ________ Btu/h?
34,130
Generally speaking, electric heat is very efficient but can be more expensive to operate compared to oil and gas
True
Large Quantity of electrical energy is necessary to produce heat
Some units may be designed to move enough air across the heating elements so that they do not glow.
True
Electric heating units provide almost instant heat. therefore, anticipators are not needed in electric heat thermostats
True
If the number two contact on a package sequencer fails to close, the number three contact can still close
True
All electric furnaces use package sequencers.
False
If the fan was to fail and the limit switch stuck closed, the element would be cut off by the ________?
Fusible Link
In order to prevent a duct-mounted electric heater from being energized when the fan is not on, a ________ should be used.
Interlock
A set of contacts actuated by a bimetal strip with a low-voltage wire wrapped around it is called a(n) ___________
Sequencer
In order to provide time delay between stages of electric heat, the controls that are used are called _________?
sequences
Radiant electric heating panels used to ceiling installation are of made of a __________________ with wire heating circuits running throughout?
a gypsum board
for each watt of electrical power, __________ Btu/h are generated.
3.413
Where in a room are electric baseboard heaters normally placed?
Usually found on the wall just above the floor or carpet
How should you determine the heat anticipator setting on a room thermostat?
By the total current draw in the 24-V heating circuit that passes through the thermostat control
Why do most electric furnaces have several heating elements that are activated in stages?
To prevent a high load coming on all at once.