2024 Summer TAB Journal Quiz | AABC Official

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2024 Summer TAB Journal Quiz

Step 1 of 11

9%

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 Problems with VAV Boxes

Tim Sibinski, TBE, Systems Management and Balancing of Minnesota

1. How does the author suggest finding the blockage in a duct (a system problem)?(Required)

Drilling a hole ahead of the VAV box to measure pressure

Drilling a hole behind the VAV box to measure pressure

Removing a piece of the duct to look inside

Inspecting the flow cross tubing

TAB Pressure Critical Pitfalls

Brian Trogstad, TBE, Design Control, Inc.

2. What was missing from the author’s recent project that led to problems achieving pressures?(Required)

door glass

electrical outlets

door sweeps

lights

VAV System Pressure Issues

John H. Gazo, TBS, Accu-Air Balance Co. (1991) Inc.

3. What did the team find after determining that there was still a pressure discrepancy in the center branch?(Required)

The center duct was partially blocked.

The center duct split into two branches.

The center duct VAV boxes were installed incorrectly.

The center duct was too large.

Case Study: Using Digital VAV Diffusers

Timothy J. Mahoney, TBE, Mechanical Test and Balance Corporation

4. In the case discussed in the article, why didn’t the VAV box modulate?(Required)

The temperature was too high.

The temperature was too low.

The static pressure in the duct was too high.

The static pressure in the duct was too low.

Seeing the Forest, Not Just the Trees: A Clean Room Balancing Puzzle

John A. Balanik, TBE, R.H. Cochran and Associates, Inc.

5. What did the author find strange after taking valve pressure readings?(Required)

The negative static pressure was higher at the valve inlet.

The negative static pressure was higher on the leaving side.

The exhaust fan was pulling from the inlet side.

The traverse readings indicated improper flow.

Seeing the Forest, Not Just the Trees: A Clean Room Balancing Puzzle

John A. Balanik, TBE, R.H. Cochran and Associates, Inc.

6. How did the author's team ensure proper operation of the fume hoods?(Required)

They couldn't figure out the problem.

The reinstalled them in a different place.

They increased the fan speed.

They built partitions around each hood.

Case Studies: Hardware and Software Improvements in VAV Systems

Todd Yates, PE, TBE, CxA, and Eric Jespersen, Synergy Test and Balance, Inc.

7. Case Study #1: What part of the valves had a new design?(Required)

The body

The linear actuator

The servo/encoder

The control mechanism

Case Studies: Hardware and Software Improvements in VAV Systems

Todd Yates, PE, TBE, CxA, and Eric Jespersen, Synergy Test and Balance, Inc.

8. Case Study #2: How many damper position changes were the VAVs making per flow input update?(Required)

One

Ten

Two to three

Four to five

Installing Pressure Independent Valves into a Constant Volume System

Paul Mocny, TBE, MESA3 Inc.

9. What was the exhaust system's ideal differential pressure according to factory tech support?(Required)

0.60"

0.70"

0.25"

0.50"

Installing Pressure Independent Valves into a Constant Volume System

Paul Mocny, TBE, MESA3 Inc.

10. Why didn't the owner want the team to do a full system balance?(Required)

Noise level

Duration of work

Impact to occupants

All of the above

Δ

Kindly be advised that the fee is non-refundable.

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