Question 1

Heat radiation is accomplished when the heat rays are transmitted through space.

Accepted Answer

Heat radiation is a type of electromagnetic radiation that does not require a medium to travel through, so it can be transmitted through space.

Question 2

The heat pump is the most efficient type of electric heat.

Accepted Answer

Heat pumps are the most efficient type of electric heat because they use electricity to move heat from one place to another instead of generating heat directly. This process can be two to three times more efficient than traditional heating methods.

Question 3

____ heating is used for metal treatment and in some electric furnaces.&#10;A) Induction&#10;B) Resistance&#10;C) Arc&#10;D) Dielectric

Accepted Answer

Induction heating uses alternating current to create a magnetic field, which then induces eddy currents in the metal being heated. This results in rapid and efficient heating, making it useful for metal treatment and some electric furnaces. Resistance heating (B) uses the resistance of the metal itself to generate heat, while arc heating (C) uses an electric arc to heat the metal. Dielectric heating (D) is typically used for heating insulating materials, such as plastics.

Question 4

Arc heating is used in ____.&#10;A) space heating&#10;B) cooking&#10;C) welding&#10;D) medical applications

Accepted Answer

Arc heating is primarily used in welding to create a high-temperature electric arc, which is used to melt or fuse metals together. It is not typically used for space heating or cooking, and while there may be some medical applications, it is not a commonly used technique in the medical field.

Question 5

To replace lost moisture in the air, a(n) ____ may be used.&#10;A) induction fan&#10;B) exhaust fan&#10;C) humidifier&#10;D) dehumidifier

Accepted Answer

Humidifiers add moisture back into the air, which can help improve indoor air quality and alleviate dry skin, nasal congestion, and other respiratory symptoms that are often caused by dry air.

Question 6

Conduction heating is a method by which heat is transferred from one object to another through the air or some other fluid.

Accepted Answer

Conduction heating is a method by which heat is transferred from one object to another through direct contact, not through the air or some other fluid. Heat can also be transferred through convection (via fluid movement) and radiation (via electromagnetic waves).

Question 7

For a baseboard heater, the ____ functions as the operating control.&#10;A) room thermostat&#10;B) humidistat&#10;C) safety control&#10;D) furnace

Accepted Answer

A room thermostat functions as the operating control for a baseboard heater, as it is responsible for turning the heater on and off to maintain a desired temperature in the room. A humidistat measures the humidity levels in the air and is not typically used for controlling baseboard heaters. A safety control is designed to shut off the heater if it overheats or if there is a malfunction, but it is not the primary operating control. A furnace is a completely different type of heating system and is not related to baseboard heaters.

Question 8

____ heating is used for drying operations, food warming, and medical purposes.&#10;A) Resistance&#10;B) Arc&#10;C) Induction&#10;D) Infrared

Accepted Answer

Infrared heating is best suited for drying operations, food warming and medical purposes as it is a form of radiant heating that directly heats the surfaces it strikes, making it ideal for such applications.

Question 9

A(n) ____ can heat an area during cold weather and can cool the area during warm weather.&#10;A) electric baseboard heater&#10;B) heat pump&#10;C) electric furnace&#10;D) electric heating cable

Accepted Answer

A heat pump is the only option listed that can both heat and cool an area, making it the best choice for year-round temperature control.

Question 10

Dielectric heating is based on the principle of ____.&#10;A) resistance&#10;B) forced air&#10;C) inductance&#10;D) capacitance

Accepted Answer

Dielectric heating is based on the principle of capacitive heating, where an electric field is applied to a dielectric material causing it to heat up due to the friction between the molecules in the material.

Question 11

To provide a comfortable area, it is recommended to maintain a temperature of 68 degrees Fahrenheit (20 degrees Celsius) with a relative humidity of 15 percent.

Accepted Answer

The answer of To provide a comfortable area, it is...

Question 12

For health and comfort, a relative humidity of ____ percent is desirable.&#10;A) 3-5&#10;B) 10-15&#10;C) 30-40&#10;D) 80-90

Accepted Answer

The answer of For health and comfort, a relative humidity...

Question 13

In resistance baseboard heating, both conduction and natural convection take place, along with a small amount of radiation .

Accepted Answer

The answer of In resistance baseboard heating, both conduction and...

Question 14

____ are similar to the electric furnace, but instead of having all the elements in one location, they are installed in the ducts for each specific area.&#10;A) Electric heating cables&#10;B) Convection heaters&#10;C) Baseboard heaters&#10;D) Duct heaters

Accepted Answer

The answer of ____ are similar to the electric furnace,...

Question 15

____ utilizes the fact that current flowing through a material produces heat.&#10;A) Dielectric heating&#10;B) Resistance heating&#10;C) Induction heating&#10;D) Convection heating

Accepted Answer

The answer of ____ utilizes the fact that current flowing...

Deck 15: Electric Heat