Question 1

The metering device in a modern room air conditioner is a(n) ____________________.

Accepted Answer

capillary tube

Question 2

Why may the window unit installation be considered temporary and the through-the-wall unit considered permanent?

Accepted Answer

The window air conditioner may be removed and the window restored to its original use. The wall installation is permanent because a hole is cut in the wall and must be patched if the unit is removed.

Question 3

Cooling-only window air conditioners range in size from about 4,000 Btu/h to 24,000 Btu/h.

Accepted Answer

A) True 
 B)False  True

Question 4

Heat exchange between the capillary tube and the suction line is typically found on window air conditioners.

Accepted Answer

A) True 
 B)False

Question 5

To ensure correct direction of refrigerant flow in heat-pump-style room air conditioners, ____ are included in the unit.

Accepted Answer

A)  filter drivers 
B)  globe valves 
C)  quarter-turn valves 
D)  check valves 
A)  filter drivers 
B)  globe valves 
C)  quarter-turn valves 
D)  check valves

Question 6

Electrical service for a room unit may also involve the thermostat and the power cord.

Accepted Answer

A) True 
 B)False

Question 7

In a heat-pump-style room air conditioner in the heating cycle, the indoor coil acts as the ____________________.

Accepted Answer

The answer of In a heat-pump-style room air conditioner in...

Question 8

When servicing an R-410A window air conditioner, adjust the airflow across the condenser until the head pressure reaches ____.

Accepted Answer

A)  360 psig 
B)  400 psig 
C)  420 psig 
D)  460 psig 
A)  360 psig 
B)  400 psig 
C)  420 psig 
D)  460 psig

Question 9

All 230-V power supplies use the same style plug.

Accepted Answer

A) True 
 B)False

Question 10

In a heat-pump room air conditioner in the cooling cycle, the indoor coil acts as the ____________________.

Accepted Answer

The answer of In a heat-pump room air conditioner in...

Question 11

If a window air conditioner is installed with an inward pitch, the condensate could leak into the room.

Accepted Answer

A) True 
 B)False

Question 12

A heat-pump-style room air conditioner has all the major components of a cooling-only unit with the addition of a ____.

Accepted Answer

A)  3-way valve 
B)  4-way valve 
C)  quarter-turn valve 
D)  line-tap valve 
A)  3-way valve 
B)  4-way valve 
C)  quarter-turn valve 
D)  line-tap valve

Question 13

Cooling-only room air conditioners are marketed in ____ Btu/h capacities.

Accepted Answer

A)  1,000 to 15,000 
B)  3,000 to 20,000 
C)  4,000 to 24,000 
D)  5,000 to 30,000 
A)  1,000 to 15,000 
B)  3,000 to 20,000 
C)  4,000 to 24,000 
D)  5,000 to 30,000

Question 14

Central air conditioning systems operate with a design evaporator saturation temperature of about ____________________ºF.

Accepted Answer

The answer of Central air conditioning systems operate with a...

Question 15

Some cooling-only window air conditioners are equipped with energy-saver switches. What is their purpose?

Accepted Answer

The purpose of this switch is

Question 16

What are the two advantages of draining the condensed moisture to the slinger system on the condenser?

Accepted Answer

1 Keeps the unit fro

Question 17

Why do room air conditioners ice up easier than central air-conditioning systems?

Accepted Answer

Room air conditioner

Question 18

The evaporator typically operates _____ the dew point temperature of the room air.

Accepted Answer

A)  much lower than 
B)  much higher than 
C)  below 
D)  above 
A)  much lower than 
B)  much higher than 
C)  below 
D)  above

Question 19

How many air moving motors do cooling-only room air conditioners usually have?

Accepted Answer

The answer of How many air moving motors do cooling-only...

Question 20

The condensate off the evaporator coil in a room air conditioner is generally disposed of by ____.

Accepted Answer

A)  draining to the outside soil 
B)  piping to a storm drain 
C)  draining to the slinger system of the fan 
D)  draining to a holding tank 
A)  draining to the outside soil 
B)  piping to a storm drain 
C)  draining to the slinger system of the fan 
D)  draining to a holding tank

Exam 46: Room Air Conditioners

The metering device in a modern room air conditioner is a(n) ____________________.

Why may the window unit installation be considered temporary and the through-the-wall unit considered permanent?

Cooling-only window air conditioners range in size from about 4,000 Btu/h to 24,000 Btu/h.

Heat exchange between the capillary tube and the suction line is typically found on window air conditioners.

To ensure correct direction of refrigerant flow in heat-pump-style room air conditioners, ____ are included in the unit.

Electrical service for a room unit may also involve the thermostat and the power cord.

In a heat-pump-style room air conditioner in the heating cycle, the indoor coil acts as the ____________________.

When servicing an R-410A window air conditioner, adjust the airflow across the condenser until the head pressure reaches ____.

All 230-V power supplies use the same style plug.

In a heat-pump room air conditioner in the cooling cycle, the indoor coil acts as the ____________________.

If a window air conditioner is installed with an inward pitch, the condensate could leak into the room.

A heat-pump-style room air conditioner has all the major components of a cooling-only unit with the addition of a ____.

Cooling-only room air conditioners are marketed in ____ Btu/h capacities.

Central air conditioning systems operate with a design evaporator saturation temperature of about ____________________ºF.

Some cooling-only window air conditioners are equipped with energy-saver switches. What is their purpose?

What are the two advantages of draining the condensed moisture to the slinger system on the condenser?

Why do room air conditioners ice up easier than central air-conditioning systems?

The evaporator typically operates _____ the dew point temperature of the room air.

How many air moving motors do cooling-only room air conditioners usually have?

The condensate off the evaporator coil in a room air conditioner is generally disposed of by ____.

Heat and Pressure

Matter and Energy

Refrigeration and Refrigerants

General Safety Practices

Tools and Equipment

Fasteners

Tubing and Piping

Leak Detection, System Evacuation and System Clean-Up

Refrigerant and Oil Chemistry and Managementrecovery, Recycling, Reclaiming, and Retrofitting

System Charging

Calibrating Instruments

Basic Electricity and Magnetism

Introduction to Automatic Controls

Automatic Control Components and Applications

Troubleshooting Basic Controls

Advanced Automatic Controlsdirect Digital Controls Ddc and Pneumatics

Types of Electric Motors

Application of Motors

Motor Controls

Troubleshooting Electric Motors

Evaporators and the Refrigeration System

Condensers

Compressors

Expansion Devices

Special Refrigeration System Components

Application of Refrigeration Systems

Commercial Ice Machines

Special Refrigeration Applications

Troubleshooting and Typical Operating Conditions for Commercial Refrigeration

Electric Heat

Gas Heat

Oil Heat

Hydronic Heat

Indoor Air Quality

Comfort and Psychrometrics

Refrigeration Applied to Air Conditioning

Air Distribution and Balance

Installation

Residential Energy Auditing

Typical Operating Conditions

Troubleshooting

Heat Gain and Heat Loss in Buildings

Air Source Heat Pumps

Geothermal Heat Pumps

Domestic Refrigerators and Freezers

High-Pressure, Low-Pressure, and Absorption Chilled-Water Systems

Cooling Towers and Pumps

Operation, Maintenance, and Troubleshooting of Chilled-Water Air Conditioning Systems

Commercial Rooftop, Packaged, Variable Refrigerant Flow, and Variable Air Volume Systems

Filters