Deck 19: Testing, Adjusting and Balancing

Question 1

The National Comfort Institute recently reported that approximately __________of air conditioning systems are operating at less than maximum efficiency

A) 10%
B) 45%
C) 57%
D) 70%

Answer 1

C

Question 2

__________ is the process of using specialized, properly calibrated instruments to measure characteristics of fluid flow and electricity.

A) Adjusting
B) Balancing
C) Documenting
D) Testing

Answer 2

D

Question 3

The main concern of proportional balancing is to have the airflow at any given outlet at the same percentage of design airflow as any other outlet in the system.

Answer 3

True

Question 4

Testing and balancing is the process of determining if __________.

Question 5

Improper system sizing, airflow and charging result in a significant reduction in capacity that can be as great as __________.

A) 10%
B) 20%
C) 40%
D) 50%

Question 6

__________ is the process of varying fluid flow by changing the settings on fluid flow controls such as valves, dampers, and blowers.

A) Adjusting
B) Balancing
C) Documenting
D) Testing

Question 8

The air pathway with the greatest resistance is often the __________.

A) longest
B) most narrow
C) shortest
D) widest

Question 9

In the domestic environment, TAB work is typically performed on the hot water heating system.

Question 10

__________ is the process of matching the actual fluid flow rates to the desired fluid flow rates within an acceptable range.

A) Adjusting
B) Balancing
C) Documenting
D) Testing

Question 11

Stepwise balancing involves stepping down the airflow to the outlets with the greatest amount of excess air.

Question 12

The three elements of TAB work are __________, __________, and __________.

Question 13

TAB work for residential systems involves measuring airflow rates and adjusting the volume control devices and/or blower speeds to maintain the desired airflow in the air distribution system. For the most part, the acceptable air volume in the air distribution system is within __________ of the desired airflow rate.

A) 5%
B) 8%
C) 10%
D) 12%

Question 20

Before the TAB work can begin, it is important to know what the __________ for the system are.

Question 21

By initiating the TAB process, a number of system deficiencies that might otherwise go unnoticed can be uncovered and remedied. List five such deficiencies

Question 22

It is estimated that approximately __________% of residential central air conditioning systems are oversized, about __________% are improperly charged with refrigerant and that approximately __________% of residential systems have inadequate airflow.

Question 23

A system is said to be balanced when two conditions are met. List these two conditions.

Question 24

The first step to balancing an air distribution system is making certain that __________ is being provided by the blower.

Question 25

Describe the two most popular ways to measure the air volume supplied by the system blower.