Deck 6: Reading Schematic Diagrams

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.

Answer 1

True

Question 2

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

Answer 2

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.

Answer 3

True

Question 4

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

Question 5

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

Question 7

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

Question 8

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

Question 9

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

Question 10

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

Question 11

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

Question 12

What are the loads in the commercial freezer?

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.

Question 14

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.

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.

Question 17

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

Question 18

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

Question 19

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

Question 20

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