2021 Winter TAB Journal Quiz

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

Troubleshooting a PICV

Tom Holcomb, TBE, Precisionaire of the the Midwest, Inc.

1. How did the TAB process for the heating water system begin?(Required)

Shutting down the heating system

Emptying the pipes

Putting the heating system into a full flow state

Troubleshooting a PICV

Tom Holcomb, TBE, Precisionaire of the the Midwest, Inc.

2. What was the recommended solution for the heating issues?(Required)

Installing the next smaller size valve

The valve was broken and needed to be replaced with the same version

Replacing the VAV system

Constant Air System: TAB Tips

Marc Desjardins, PE, TBS, Kanata Air Balancing & Engineering Services

3. How does a TAB professional avoid causing major noise when balancing a constant air system?(Required)

Make sure there are no leaks before tapping directly into a high-flow main duct branch

Do not tap directly into a high-flow main duct branch with a low-flow diffuser

Open all vents and reduce power to 50 percent

Constant Air System: TAB Tips

Marc Desjardins, PE, TBS, Kanata Air Balancing & Engineering Services

4. According to the article, if the building load requires 400 cfm, make sure the rooftop unit’s capacity is not more than:(Required)

3 - 5 tons

1 - 1.5 tons

4.5 - 5 tons

Parallel Condensing Boiler System Issues

Brian LaFleur, TBE, CxA, Engineered Air Balance Co., Inc.

5. For the parallel condensing boiler system listed in the story, the manufacturer’s catalog stated that the boilers were designed to withstand thermal stresses with supply and temperature differences up to:(Required)

60 ⁰F

95 ⁰F

100 ⁰F

Parallel Condensing Boiler System Issues

Brian LaFleur, TBE, CxA, Engineered Air Balance Co., Inc.

6. What was causing the firing boiler to overcompensate?(Required)

The mixing of the hot outlet water from the firing boiler with the cold outlet water from the non-firing boilers, creating a lower-response in loop temperature.

A crack in the firing boiler, causing heat to escape and the system to try to rectify.

Closed three-way valves were preventing the mixing of hot and cold outlet water, leading to damage to the system’s piping.

Parallel Condensing Boiler System Issues

Brian LaFleur, TBE, CxA, Engineered Air Balance Co., Inc.

7. What was the new minimum flow rate after implementing the design solution?(Required)

95 GPM

60 GPM

30 GPM

Factory Make-Up Air

George G. Ebert III, TBE, Fluid Dynamics, Inc.

8. What is often found to be the primary reason for the request for factory airflow test and analysis services?(Required)

Determine the effectiveness of installed VAVs

Ensure proper ventilation

To eliminate negative building pressure

Factory Make-Up Air

George G. Ebert III, TBE, Fluid Dynamics, Inc.

9. What’s the first step in the article’s proposed method for eliminating excessive building negative pressure?(Required)

Confirm that all make-up air units, ventilation exhaust fans, process exhaust fans, process furnaces and ovens are operating as expected.

Before testing, all make-up air and exhaust air systems should be inspected and confirmed to be operating at maximum performance capability.

Visual inspection of the wall perimeter and roof area to identify passive openings in the building shell, covering any temporary openings prior to testing.

Factory Make-Up Air

George G. Ebert III, TBE, Fluid Dynamics, Inc.

10. According to the article, building static pressure should be measured at a minimum of how many locations with all doors closed?(Required)

5

10

3

Witnessing Duct Leakage Testing

Brian Corcoran, TBE, ProTAB, Inc.

11. For the project in the article, what is the testing manual that the specification stated needed to be followed?(Required)

ASHRAE

SMACNA

AABC

Witnessing Duct Leakage Testing

Brian Corcoran, TBE, ProTAB, Inc.

12. What was the leakage class that the TAB professional interpreted to be allowable?(Required)

6

10

16

10 TAB Wishes

William Carson Judge, TBE, CxA, EMP, Bay to Bay Balancing, Inc.

13. What is the “TAB Wish” of the author related to specified balancing tolerances?(Required)

They should be adjustable by the installing contractor

They should be achievable in field conditions

They should always be +/-5%

10 TAB Wishes

William Carson Judge, TBE, CxA, EMP, Bay to Bay Balancing, Inc.

14. What does the article list as one of the most significant causes of noise in HVAC system?(Required)

Loose supports

Air leakage

High-velocity air

10 TAB Wishes

William Carson Judge, TBE, CxA, EMP, Bay to Bay Balancing, Inc.

15. Which of the following plays a critical role in the magnitude of pressure differentials in energy recovery ventilator systems?(Required)

Balancing tolerances

The virtually nonexistent leakage

Fan location

2021 Winter TAB Journal Quiz

Suggested Drawing Specification

AIA-Format LONG-FORM SPECIFICATION

Section 230593 – TESTING, ADJUSTING AND BALANCING FOR HVAC

AIA-Format SHORT – FORM SPECIFICATION

Section 230593 – TESTING, ADJUSTING AND BALANCING FOR HVAC

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