Question 1

A split system is designed in two sections: a condensing unit and a device that is used for the air flow in the system and the heat source if it is not a heat pump.

Accepted Answer

A split system is indeed designed in two main sections: the outdoor unit, known as the condensing unit, which houses the compressor, condenser coil, and expansion valve; and the indoor unit, which is responsible for air flow and often includes the evaporator coil and fan. The indoor unit can also contain a furnace or air handler, serving as the heat source in systems that are not heat pumps.

Question 2

What is a function of a reversing valve?

Accepted Answer

A reversing valve is used to reverse the flow of refrigerant in a mechanical refrigeration system.

Question 3

The air flow on most structures that use a fossil fuel for a heat source have a(n) ____________________ that would be used as an air supply.

Accepted Answer

furnace

Question 4

The condensing unit is used to remove the heat from the refrigeration system that had been absorbed by the evaporator.

Accepted Answer

The condensing unit in a refrigeration system is responsible for releasing the heat absorbed by the evaporator into the outside air, thus cooling the refrigerant and turning it back into a liquid form.

Question 5

Heat pump control systems and air-conditioning control systems are similar in many ways.

Accepted Answer

Both heat pump and air-conditioning control systems regulate temperature within buildings, often using similar components and control logic to manage heating, cooling, and sometimes humidity, making their control systems similar in functionality and design.

Question 6

In early control systems, almost all components necessary for the operation of the air-conditioning system were mounted on the wall near the condensing unit.

Accepted Answer

In early control systems, components necessary for the operation of the air-conditioning system were not typically mounted on the wall near the condensing unit. Instead, they were often located in various places, including indoors for thermostats and air handlers, and outdoors for the condensing unit, with control wiring connecting these components.

Question 7

What is a zone control system?

Accepted Answer

The answer of What is a zone control system?...

Question 8

The compressor is the smallest electric load in an air-conditioning system.

Accepted Answer

The compressor is typically one of the largest electric loads in an air-conditioning system, as it requires significant power to compress the refrigerant and enable heat exchange.

Question 9

The ____________________ is the portion of a split air-conditioning system that is mounted outside and generally contains the compressor, the condenser, the condenser fan motor, and the necessary devices to control these components.

Accepted Answer

The answer of The ____________________ is the portion of a...

Question 10

The most widely used types of packaged units in residential air-conditioning applications that use air to remove the heat from the condenser are ____________________ packaged units.

Accepted Answer

The answer of The most widely used types of packaged...

Question 11

Most safety controls used in residential control systems are connected in ____________________ with the contactor coil.

Accepted Answer

The answer of Most safety controls used in residential control...

Question 12

The evaporator fan motor is controlled by an indoor fan relay controlled by the ____________________.

Accepted Answer

The answer of The evaporator fan motor is controlled by...

Question 13

Why are defrost controls used?

Accepted Answer

The answer of Why are defrost controls used?...

Question 14

What is field wiring?

Accepted Answer

The answer of What is field wiring?...

Question 15

The cooling cycle of the heat pump is the same as an air-conditioning system.

Accepted Answer

Both a heat pump in cooling mode and an air-conditioning system operate on the same basic refrigeration cycle principle, using a compressor to circulate refrigerant, absorb heat from the interior and release it outside.

Question 16

List four elements of the air-conditioning system that the total system control module must supervise.

Accepted Answer

The answer of List four elements of the air-conditioning system...

Question 17

A(n) ____________________ heat pump system uses air to transfer the heat to the conditioned space and water as the heat transfer medium for the heat exchanger used as the condenser in the cooling cycle and the evaporator in the heating cycle.

Accepted Answer

The answer of A(n) ____________________ heat pump system uses air...

Question 18

The ____________________ heat pump uses air as the heat transfer medium in both the indoor and outdoor coils.

Accepted Answer

The answer of The ____________________ heat pump uses air as...

Question 19

The ____________________ is a refrigeration system that reverses the refrigerant flow to effectively heat a structure in the winter.

Accepted Answer

The answer of The ____________________ is a refrigeration system that...

Question 20

The first basic circuit of almost any residential control system is the device that stops and starts a compressor.

Accepted Answer

The first basic circuit in residential control systems, like HVAC systems, often includes a switch or relay to control the compressor, which is essential for starting and stopping its operation.

Quiz 15: Residential Air-Conditioning Control Systems