Deck 3: Electric-Heat Equipment

Question 1

Electric baseboard heaters are classified as ____.

A) natural draft convectors
B) forced draft convectors
C) forced draft conductors
D) radiant heaters

Answer 1

A

Question 2

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

Answer 2

True

Question 3

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.

Answer 3

True

Question 4

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

Question 5

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.

Question 6

Radiant heat is transferred by ____.

A) ultraviolet rays
B) infrared rays
C) ionization
D) refraction

Question 7

An electric heating unit in a duct system is classified as a ____.

A) natural draft convector
B) forced draft convector
C) forced draft conductor
D) radiant heater

Question 8

What would happen if the fan on an electric unit heater burned out?

A) The heater would remain energized until the fusible link melts.
B) The interlock switch would de-energize the electric heater.
C) The unit will still heat the area, but it would take longer to do so.
D) Both a or b are possible.

Question 9

If a duct-mounted electric heater is to be installed and it is discovered that the heater is too long to fit inside the duct (the duct is 10 inches high and 14 inches wide and the heater is 9¹/₂ inches high and 18 inches long), what can the technician do to properly complete the installation?

A) Install the heater at an angle.
B) Cut a slot in the duct work and allow the heater to protrude 4 inches out of the duct.
C) Return the heater to the supply house and obtain the correct size heater.
D) Cut the ends of the coils off the heater and increase the fan speed.

Question 10

A 10 Kw heating element, operating on rated 240 V, will have a Btu/h output of ____.

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

Question 11

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

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

Question 12

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

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

Question 13

All electric furnaces use package sequencers.

Question 14

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.

Question 15

A 10 Kw heating element, operating on rated 240 V, will have a Btu/h output of ____.

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

Question 16

Generally speaking, electric heat is very efficient but costs more when compared to oil and gas.

Question 17

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

Question 18

For maximum element life, the element must have sufficient air over all parts of the element to prevent any part of the element from glowing red.

Question 19

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

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) open the circuit to the element if the furnace overheats

Question 20

Electric heating units provide almost instant heat. Therefore, anticipators are not needed in electric heat thermostats.

Question 21

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

Question 22

How should you determine the heat anticipator setting on the room thermostat using a package sequencer?

Question 23

For maximum element life, the element must have sufficient air over all parts of the element to prevent any part of the element from glowing red.

Question 24

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

Question 25

The amount of heat energy in 1 watt of electrical energy is _________________________.

Question 26

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

Question 27

A set of contacts actuated by a bimetal heat motor is called a ____________________.

Question 28

Electric heating units provide almost instant heat. Therefore, anticipators are not needed in electric heat thermostats.

Question 29

What term of rating or measurement is used with electric heat units?

Question 30

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

Question 31

How should you determine the heat anticipator setting on a room thermostat using individual sequencers?

Question 32

Generally speaking, electric heat is very efficient but costs more when compared to oil and gas.

Question 33

All electric furnaces use package sequencers.

Question 34

How can a technician visually determine if there is ample air flow across a duct-mounted electric heater?

Question 35

A set of contacts actuated by a magnetic coil is called a ______________________________.

Question 36

Why are baseboard electric heaters placed on the outer walls of a room?

Question 37

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

Question 38

The amount of heat energy in 1 watt of electrical energy is _________________________.

Question 39

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

Question 40

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.

Question 41

An electric unit blows fuses periodically during the winter heating season. Checking the amperage draw of the elements shows normal amperage draw for the size of the elements. What other problem could cause this?

Question 42

An electric unit blows fuses periodically during the winter heating season. Checking the amperage draw of the elements shows normal amperage draw for the size of the elements. What other problem could cause this?

Question 43

If an electric heater has three heating elements connected in parallel, why does each element have its own fusible link and limit switch?

Question 44

An electric unit blows fuses periodically during the winter heating season. Checking the amperage draw of the elements shows normal amperage draw for the size of the elements. What other problem could cause this?

Question 45

What term of rating or measurement is used with electric heat units?

Question 46

If an electric heater has three heating elements connected in parallel, why does each element have its own fusible link and limit switch?

Question 47

An electric unit blows fuses periodically during the winter heating season. Checking the amperage draw of the elements shows normal amperage draw for the size of the elements. What other problem could cause this?

Question 48

If an electric heater has three heating elements connected in parallel, why does each element have its own fusible link and limit switch?

Question 49

If an electric heater has three heating elements connected in parallel, why does each element have its own fusible link and limit switch?