Question 1

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

Accepted Answer

Their oper...

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

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

Accepted Answer

A)   natural-convection heater
B)   forced-convection heater
C)   forced-draft conductor
D)   radiant heater

Question 4

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

Accepted Answer

A)   fuse
B)   interlock
C)   element
D)   fan

Question 5

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

Accepted Answer

The answer of In order to prevent a duct-mounted electric...

Question 6

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

Accepted Answer

The answer of In order to provide time delay between...

Question 7

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

Accepted Answer

The answer of For each watt of electrical power, ____________________...

Question 8

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

Accepted Answer

A)   29,319
B)   31,062
C)   34,130
D)   35,875

Question 9

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

Accepted Answer

The answer of Radiant electric heating panels used for ceiling...

Question 10

Electric baseboard heaters are classified as ____ .

Accepted Answer

A)   natural-convection heaters
B)   forced-convection heaters
C)   forced-draft conductors
D)   radiant heaters A

Question 11

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

Accepted Answer

A)   start the unit if the thermostat malfunctions
B)   ensure that the fan stops when the unit cools down
C)   start the unit prematurely on a cold day
D)   shuts off the unit if high temperature occurs D

Question 12

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

Accepted Answer

The answer of A set of contacts actuated by a...

Question 13

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

Accepted Answer

A)   copper
B)   nickel steel
C)   nickel chromium
D)   aluminum

Question 14

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

Accepted Answer

A pictorial diagram shows comp...

Question 15

Where are unit and wall electric heaters typically mounted ?

Accepted Answer

They are typically mounted on ...

Question 16

Where in a room are electric baseboard heaters normally placed ?

Accepted Answer

They are mounted on the wall just above the floor or carpet, usually on outside walls .

Question 17

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

Accepted Answer

The sensib...

Question 18

The benefits of electric baseboard heating are that ____ .

Accepted Answer

A)   each room can be controlled individually
B)   they are inexpensive to install
C)   they operate on a 24-V power supply
D)   Both a and b.

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 30: Electric Heat

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

Correct AnswerverifiedTheir oper...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Electric baseboard heaters are classified as ____ .

Correct AnswerverifiedA

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

Correct AnswerverifiedD

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedA pictorial diagram shows comp...View AnswerShow Answer

Where are unit and wall electric heaters typically mounted ?

Correct AnswerverifiedThey are typically mounted on ...View AnswerShow Answer

Where in a room are electric baseboard heaters normally placed ?

Correct AnswerverifiedThey are mounted on the wall just above the floor or carpet, usually on outside walls .

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

Correct AnswerverifiedThe sensib...View AnswerShow Answer

The benefits of electric baseboard heating are that ____ .

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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Their oper...
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A

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D

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A pictorial diagram shows comp...
View Answer

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They are typically mounted on ...
View Answer

Correct Answer
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They are mounted on the wall just above the floor or carpet, usually on outside walls .

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

Correct Answer
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The sensib...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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