2021 Fall TAB Journal Quiz

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Name(Required)

First Last

Email(Required)

Company Name(Required)

Are you an AABC, ACG, or EMA member? (check all that apply)(Required)

AABC

ACG

EMA

None of the above

Determining Outside Air on Small Ton Rooftop Units Can be a Challenge

Michael Carrillo, TBE, Professional Balancing Services, Inc.

1. What standard was recommended for the scenario proposed for airflow measurement?(Required)

SMACNA

ASHRAE 202

DMG

RTU

Determining Outside Air on Small Ton Rooftop Units Can be a Challenge

Michael Carrillo, TBE, Professional Balancing Services, Inc.

2. Why was it fortunate that all the grilles in this system were all the same type and size?(Required)

It makes ordering new parts easier.

They can be swapped out for one another.

It eliminates the need to determine different correction factors.

It reduces the likelihood of leakage.

Determining Outside Air on Small Ton Rooftop Units Can be a Challenge

Michael Carrillo, TBE, Professional Balancing Services, Inc.

3. Why couldn’t the mixed air temperature method be used for this project?(Required)

There were more outside air openings than conduits for return air.

The leak in the system made it difficult to determine air temperature.

The heating system would periodically turn on and contaminate the results.

The temperatures for the outside and return air were too close together.

Room Pressure Balancing for Critical Environments

Jeremy Johnson, TBE, CxA, American Testing, Inc.

4. For a standard 36 in. door with a negative containment of .01 in. w.g., what is the range of transfer air typically required?(Required)

0-75 CFM

75-150 CFM

150-225 CFM

225-300 CFM

Room Pressure Balancing for Critical Environments

Jeremy Johnson, TBE, CxA, American Testing, Inc.

5. Why are hard drywall ceilings preferable compared to lay-in tile ceilings?(Required)

They don’t release particulates into the air and cause malfunctions to equipment.

They provide a tighter room envelope for testing.

They can be spackled over easily to fix repairs for issues caused by testing.

Equipment can be mounted more easily.

Room Pressure Balancing for Critical Environments

Jeremy Johnson, TBE, CxA, American Testing, Inc.

6. Why do BSL-3 and 4 labs usually require smaller CFM adjustments compared to other facilities?(Required)

They’re usually newer facilities and have been balanced more recently.

Labs have tighter room envelopes and construction standards.

Fewer people enter and leave labs than other facilities, so the systems become unbalanced less often.

Lab systems are better constructed than other facilities.

Practical Issues with Airflow Measuring Stations and the Balancer

Mat Chenvert, TBE, Air Systems Engineering, Inc.

7. Why does testing of airflow measuring stations often occur in October, when in-person schooling generally begins in August/September?(Required)

Completed AFMS are often not required for occupancy.

The colder temperature can impact equipment.

Moisture levels can cause issues with readings.

Outside air use fluctuates at odd levels.

Practical Issues with Airflow Measuring Stations and the Balancer

Mat Chenvert, TBE, Air Systems Engineering, Inc.

8. In the event that the TAB professional performs setup on the AFMS to keep a project moving, what extra steps should they take?(Required)

Record setup parameters for future reference.

Notify the installer that they have performed setup.

Perform any repairs necessary.

Keep any non-TAB personnel away until setup is complete.

Practical Issues with Airflow Measuring Stations and the Balancer

Mat Chenvert, TBE, Air Systems Engineering, Inc.

9. What percent of expected airflow should new AFMS be reading to be considered ready for calibration?(Required)

+/-10%

+/-20%

+/-40%

+/-50%

Troubleshooting Fans Low on Airflow

Tim Sibinski, TBE, Systems Management and Balancing of Minnesota

10. According to the manual for the rooftop air handler on the restaurant, what was the cause of the initial issue found with the unit?(Required)

The fan was spinning the wrong way.

Dampers weren’t opened.

It was set to low speed.

It was set to high speed.

Troubleshooting Fans Low on Airflow

Tim Sibinski, TBE, Systems Management and Balancing of Minnesota

11. What percent of design was the airflow of the rooftop air handler on the restaurant intended to be?(Required)

60%

100%

105%

110%

Troubleshooting Fans Low on Airflow

Tim Sibinski, TBE, Systems Management and Balancing of Minnesota

12. For the smoke evacuation fans on the retail store, what was the cause of the fan motor overheating?(Required)

The fan was set for high voltage.

The fan was spinning in the wrong direction.

The fan backdraft dampers for the system were open.

The fan was fluctuating between different voltages at random intervals.

Chilled Water Piping Troubleshooting: When Associated Readings are Your Friend

Andy Cripe, TBE, TABFX, LLC

13. In the first case, what was the only reading that changed between when the valve was opened and when the valve was closed on the chilled water pumps?(Required)

Intake pressure

Discharge pressure when the valve was closed

The temperature increased

Flow

Chilled Water Piping Troubleshooting: When Associated Readings are Your Friend

Andy Cripe, TBE, TABFX, LLC

14. In the first case, what was the cause of the blockage in the system?(Required)

A partially-closed valve that was hidden by insulation.

A glove that was mistakenly left in a pipe.

There was no blockage, the water was being pumped the wrong way.

The pipe interior had deteriorated causing a buildup of material.

Chilled Water Piping Troubleshooting: When Associated Readings are Your Friend

Andy Cripe, TBE, TABFX, LLC

15. In the second case, what was the cause of the blockage in the system?(Required)

A partially-closed valve that was hidden by insulation.

A glove that was mistakenly left in a pipe.

There was no blockage, the water was being pumped the wrong way.

The pipe interior had deteriorated causing a buildup of material.