Question 1

A heat pump is an air-conditioning system that uses a reversing valve to reverse the refrigeration cycle in order to provide heating.

Accepted Answer

A heat pump uses a reversing valve to switch the direction of refrigerant flow, which allows it to provide heating in addition to cooling, effectively reversing the refrigeration cycle for heating purposes.

Question 2

The ____________________ of a control is the point at which the contacts open or close, depending on the function of the control.

Accepted Answer

set point

Question 3

The schematic diagram resembles a ladder in that it is made up of two vertical lines representing the incoming electrical sources.

Accepted Answer

In a schematic diagram, especially in the context of electrical circuits, the two vertical lines often represent the power and ground or the two poles of the electrical source, resembling the sides of a ladder, with the rungs representing the circuit components connected between them.

Question 4

The schematic wiring diagram uses photos to represent electrical components in the system.

Accepted Answer

A schematic wiring diagram uses symbols, not photos, to represent electrical components in the system.

Question 5

List the electrical components of a dehumidifier.

Accepted Answer

The answer of List the electrical components of a dehumidifier....

Question 6

The _____________________ is a cycle of operation of a heat pump that is designed to defrost the outside coil during the heating operation

Accepted Answer

The answer of The _____________________ is a cycle of operation...

Question 7

A packaged air-conditioning unit is manufactured in one piece with all components including the thermostat.

Accepted Answer

A packaged air-conditioning unit typically includes the compressor, condenser, and evaporator all in one unit, but the thermostat is usually a separate component that is installed within the living space to allow for easy access and control of the temperature.

Question 8

The _____________________ is the section of the furnace that encloses the gas flame.

Accepted Answer

The answer of The _____________________ is the section of the...

Question 9

A(n) _____________________ takes the humidity out of air in a specific area.

Accepted Answer

The answer of A(n) _____________________ takes the humidity out of...

Question 10

What are the electrical components of a walk-in cooler?

Accepted Answer

The answer of What are the electrical components of a...

Question 11

A(n) ____________________ system is a control system that is operated by less voltage than that applied to the equipment.

Accepted Answer

The answer of A(n) ____________________ system is a control system...

Question 12

What are the loads in the commercial freezer?

Accepted Answer

The answer of What are the loads in the commercial...

Question 13

If the control system is set for heating and the temperature in the structure drops below the set point, the first stage of the heating thermostat opens.

Accepted Answer

When the temperature in the structure drops below the set point in a heating control system, the first stage of the heating thermostat closes to initiate heating, not opens.

Question 14

What is the purpose of a humidistat?

Accepted Answer

The answer of What is the purpose of a humidistat?...

Question 15

The ____________________ diagram not only identifies the electrical components that are in the unit, but also illustrates how the unit works and electrical connections that need to be made.

Accepted Answer

The answer of The ____________________ diagram not only identifies the...

Question 16

The efficiency of a heat pump decreases as the outdoor temperature drops, and at a certain point, called the _____________________, the heat pump can no longer supply enough heat to properly condition the structure.

Accepted Answer

The answer of The efficiency of a heat pump decreases...

Question 17

Why is a circuit-by-circuit arrangement used on schematic diagrams?

Accepted Answer

The answer of Why is a circuit-by-circuit arrangement used on...

Question 18

A(n) ____________________ is a refrigeration system that is designed to maintain a temperature lower than 32°F in a refrigerated case.

Accepted Answer

The answer of A(n) ____________________ is a refrigeration system that...

Question 19

The electrical source refers to the electrical energy being supplied to equipment.

Accepted Answer

The electrical source is indeed the origin of electrical energy that is supplied to equipment or a circuit, providing the necessary power for operation.

Question 20

A(n) ____________________ is a refrigerated area that is conditioned by a mechanical refrigeration system.

Accepted Answer

The answer of A(n) ____________________ is a refrigerated area that...

Quiz 6: Reading Schematic Diagrams