Question 1

Refrigerated compressed air driers typically run ____% of the time .

Accepted Answer

A)  30 
B)  50 
C)  80 
D)  100 
A)  30 
B)  50 
C)  80 
D)  100

Question 2

In a kitchen, ____ condensing units may be easier to maintain.

Accepted Answer

A)  self-contained 
B)  remote 
C)  local 
D)  hybrid 
A)  self-contained 
B)  remote 
C)  local 
D)  hybrid

Question 3

The precharged tubing for refrigeration piping is ____________________ at both ends and has quick connect fittings .

Accepted Answer

The answer of The precharged tubing for refrigeration piping is...

Question 4

The primary advantage of parallel compressor systems is their ____.

Accepted Answer

A)  higher efficiencies 
B)  nearly exact load matching ability 
C)  smaller locked-rotor amperage 
D)  limited effect of a compressor malfunction 
A)  higher efficiencies 
B)  nearly exact load matching ability 
C)  smaller locked-rotor amperage 
D)  limited effect of a compressor malfunction

Question 5

Carbon dioxide (CO2) is one of the newest refrigerants .

Accepted Answer

A) True 
 B)False

Question 6

At its triple point, CO2 can exist as ____ .

Accepted Answer

A)  vapor 
B)  liquid 
C)  solid 
D)  All of the above. 
A)  vapor 
B)  liquid 
C)  solid 
D)  All of the above.

Question 7

How are the normal condenser and the heat reclaim condenser used when in the heat reclaim mode in a series heat reclaim system ?

Accepted Answer

When a series heat reclaim sys

Question 8

Explain what pilot operation means.

Accepted Answer

Pilot operation means that the

Question 9

Distributed supermarket refrigeration modules that are located very close to the display cases they refrigerate are becoming increasingly popular .

Accepted Answer

A) True 
 B)False

Question 10

The heat reclaim valve is a three-way valve that is activated by a solenoid operated by a ____ .

Accepted Answer

A)  pilot 
B)  reload 
C)  preload 
D)  pressure 
A)  pilot 
B)  reload 
C)  preload 
D)  pressure

Question 11

Match between columns
                        Premises: When air is used for controls
Usually installed in the heat reclaim pump-out or bleed line to prevent migration of refrigerant to the coldest location
Tremendous forces that can cause refrigerant lines and values to rupture
Applies a false load on the evaporator when there is no load
Removes refrigerant from the heat reclaim coil when it is not being used

Accepted Answer

The Answer of bleed ports and check valve and liquid is...

Question 12

Often, parallel compressor systems employ a satellite or booster compressor .

Accepted Answer

A) True 
 B)False

Question 13

____________________ are basically refrigeration systems located in the air supply, after the storage tank.

Accepted Answer

Refrigerat

Question 14

CO2, ammonia, propane, butane, and isobutane are all natural refrigerants .

Accepted Answer

A) True 
 B)False

Exam 26: Application of Refrigeration Systems

Refrigerated compressed air driers typically run ____% of the time .

In a kitchen, ____ condensing units may be easier to maintain.

The precharged tubing for refrigeration piping is ____________________ at both ends and has quick connect fittings .

The primary advantage of parallel compressor systems is their ____.

Carbon dioxide (CO2) is one of the newest refrigerants .

At its triple point, CO2 can exist as ____ .

How are the normal condenser and the heat reclaim condenser used when in the heat reclaim mode in a series heat reclaim system ?

Explain what pilot operation means.

Distributed supermarket refrigeration modules that are located very close to the display cases they refrigerate are becoming increasingly popular .

The heat reclaim valve is a three-way valve that is activated by a solenoid operated by a ____ .

Often, parallel compressor systems employ a satellite or booster compressor .

____________________ are basically refrigeration systems located in the air supply, after the storage tank.

CO2, ammonia, propane, butane, and isobutane are all natural refrigerants .

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

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

Room Air Conditioners

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

Carbon dioxide (CO₂) is one of the newest refrigerants .

At its triple point, CO₂ can exist as ____ .

CO₂, ammonia, propane, butane, and isobutane are all natural refrigerants .