Question 1

What is the reason to use cylinder unloading in high pressure chillers?

Accepted Answer

Provide capacity con...

Question 2

When referring to evaporators, the terms "direct expansion" and "dry type" can be used interchangeably.

Accepted Answer

A) True 
 B)False

Question 3

The pressure difference in an absorption chiller where the source of energy is steam or hot water is produced with the use of a(n) ____________________ solution.

Accepted Answer

The answer of The pressure difference in an absorption chiller...

Question 4

A benefit of operating a compressor unloaded is ____.

Accepted Answer

A)   reduced energy costs
B)   reduced compression ratios
C)   increased cooling
D)   both a and bE) None of the above
F) C) and D)

Question 5

Direct expansion evaporators have ____.

Accepted Answer

A)   expansion joints between sections of the evaporator
B)   an established superheat at the outlet of the evaporator
C)   subcooling at the outlet of the evaporator
D)   an established superheat at the inlet of the evaporatorE) None of the above
F) A) and B)

Question 6

Explain how absorption refrigeration is different compression refrigeration.

Accepted Answer

The absorption process uses heat as the ...

Question 7

The pressure difference in a low-pressure chiller is produced by a(n) ____________________ compressor.

Accepted Answer

The answer of The pressure difference in a low-pressure chiller...

Question 8

In a lithium bromide system, the refrigerant boils at 40°F. What is the corresponding absolute pressure required?

Accepted Answer

0.122 lb/i...

Question 9

A reciprocating compressor with six cylinders, three banks of two cylinders each, can have its capacity reduced by unloading to ____% of full capacity.

Accepted Answer

A)   12.5
B)   25
C)   33-1/3
D)   50E) A) and B)
F) A) and C)

Question 10

A chiller typically cools ____________________ (what liquid?) for the purpose of air conditioning.

Accepted Answer

The answer of A chiller typically cools ____________________ (what liquid?)...

Question 11

Explain the difference, with respect to superheat, between a dry type evaporator and a flooded evaporator.

Accepted Answer

The dry type evaporator (direc...

Question 12

Thermostatic expansion valves are the only metering devices used in high pressure chillers.

Accepted Answer

A) True 
 B)False

Question 13

The device that automatically helps to remove non-condensables from a chiller is called a(n) ____________________.

Accepted Answer

The answer of The device that automatically helps to remove...

Question 14

High pressure chillers use either air- or water-cooled condensers.

Accepted Answer

A) True 
 B)False

Question 15

Low pressure chillers use either air- or water-cooled condensers.

Accepted Answer

A) True 
 B)False

Exam 47: High-Pressure, Low-Pressure, and Absorption Chilled-Water Systems

High pressure chillers use either air- or water-cooled condensers.

Correct Answer
verified

A benefit of operating a compressor unloaded is ____.

Correct Answer
verified

When referring to evaporators, the terms "direct expansion" and "dry type" can be used interchangeably.

Correct Answer
verified

Explain the difference, with respect to superheat, between a dry type evaporator and a flooded evaporator.

Correct Answer
verified
The dry type evaporator (direc...
View Answer

Direct expansion evaporators have ____.

Correct Answer
verified

The pressure difference in a low-pressure chiller is produced by a(n) ____________________ compressor.

Correct Answer
verified

Thermostatic expansion valves are the only metering devices used in high pressure chillers.

Correct Answer
verified

In a lithium bromide system, the refrigerant boils at 40°F. What is the corresponding absolute pressure required?

Correct Answer
verified
0.122 lb/i...
View Answer

A chiller typically cools ____________________ (what liquid?) for the purpose of air conditioning.

Correct Answer
verified

The device that automatically helps to remove non-condensables from a chiller is called a(n) ____________________.

Correct Answer
verified

Low pressure chillers use either air- or water-cooled condensers.

Correct Answer
verified

A reciprocating compressor with six cylinders, three banks of two cylinders each, can have its capacity reduced by unloading to ____% of full capacity.

Correct Answer
verified

The pressure difference in an absorption chiller where the source of energy is steam or hot water is produced with the use of a(n) ____________________ solution.

Correct Answer
verified

Explain how absorption refrigeration is different compression refrigeration.

Correct Answer
verified
The absorption process uses heat as the ...
View Answer

What is the reason to use cylinder unloading in high pressure chillers?

Correct Answer
verified
Provide capacity con...
View Answer

Exam 47: High-Pressure, Low-Pressure, and Absorption Chilled-Water Systems

High pressure chillers use either air- or water-cooled condensers.

Correct AnswerverifiedShow Answer

A benefit of operating a compressor unloaded is ____.

Correct AnswerverifiedShow Answer

When referring to evaporators, the terms "direct expansion" and "dry type" can be used interchangeably.

Correct AnswerverifiedShow Answer

Explain the difference, with respect to superheat, between a dry type evaporator and a flooded evaporator.

Correct AnswerverifiedThe dry type evaporator (direc...View AnswerShow Answer

Direct expansion evaporators have ____.

Correct AnswerverifiedShow Answer

The pressure difference in a low-pressure chiller is produced by a(n) ____________________ compressor.

Correct AnswerverifiedShow Answer

Thermostatic expansion valves are the only metering devices used in high pressure chillers.

Correct AnswerverifiedShow Answer

In a lithium bromide system, the refrigerant boils at 40°F. What is the corresponding absolute pressure required?

Correct Answerverified0.122 lb/i...View AnswerShow Answer

A chiller typically cools ____________________ (what liquid?) for the purpose of air conditioning.

Correct AnswerverifiedShow Answer

The device that automatically helps to remove non-condensables from a chiller is called a(n) ____________________.

Correct AnswerverifiedShow Answer

Low pressure chillers use either air- or water-cooled condensers.

Correct AnswerverifiedShow Answer

A reciprocating compressor with six cylinders, three banks of two cylinders each, can have its capacity reduced by unloading to ____% of full capacity.

Correct AnswerverifiedShow Answer

The pressure difference in an absorption chiller where the source of energy is steam or hot water is produced with the use of a(n) ____________________ solution.

Correct AnswerverifiedShow Answer

Explain how absorption refrigeration is different compression refrigeration.

Correct AnswerverifiedThe absorption process uses heat as the ...View AnswerShow Answer

What is the reason to use cylinder unloading in high pressure chillers?

Correct AnswerverifiedProvide capacity con...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The dry type evaporator (direc...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
0.122 lb/i...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The absorption process uses heat as the ...
View Answer

Correct Answer
verified
Provide capacity con...
View Answer