Modern Airflow and Duct Design Day 2 Test
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Question 1 of 36
1. Question
What does ASHRAE stand for?
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Question 2 of 36
2. Question
A book covering Air Distribution for Residential and Small Commercial Buildings is the definition for what?
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Question 3 of 36
3. Question
Static Pressure is?
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Question 4 of 36
4. Question
AACA Manual D covers items related to __________________.
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Question 5 of 36
5. Question
What does CF stand for?
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Question 6 of 36
6. Question
What are the recommended velocities for a supply duct ran in flex according to Manual D?
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Question 7 of 36
7. Question
What are the recommended velocities for a return branch in flex duct according to Manual D?
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Question 8 of 36
8. Question
What are the recommended velocities for a return trunk in metal duct according to Manual D?
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Question 9 of 36
9. Question
If a 10′ piece of duct is only stretched to 8′ 6″ what is the compression percentage?
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Question 10 of 36
10. Question
What is the minimum span between hangers and allowable sag in flex duct?
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Question 11 of 36
11. Question
Fan Performance depends on?
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Question 12 of 36
12. Question
What is the maximum available static pressure on an FB4C Fan Coil?
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Question 13 of 36
13. Question
What is the manufacturers design static pressure for HVAC systems?
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Question 14 of 36
14. Question
Are you really doing your job if you fail to measure static pressure every time you service a unit?
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Question 15 of 36
15. Question
Should duct systems be sealed before you check static pressure?
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Question 16 of 36
16. Question
You should measure static pressure at the ______ of your service call?
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Question 17 of 36
17. Question
All supply registers are created equally across all manufactures? IE: same size = same performance
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Question 18 of 36
18. Question
When testing a gas furnace for T.E.S.P, at what 2 points should you check?
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Question 19 of 36
19. Question
When selecting your supply registers, you should consider the following?
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Question 20 of 36
20. Question
When designing a system for installation, it is important to know what filter is going to be installed?
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Question 21 of 36
21. Question
It is important to “benchmark” every new system you install?
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Question 22 of 36
22. Question
What are the methods used to check/verify airflow or CFM supplied by the furnace or fan coil? CorrectIncorrect -
Question 23 of 36
23. Question
What is the correct formula for measuring airflow on a fan coil with resistant heat? CorrectIncorrect -
Question 24 of 36
24. Question
Volts x Amperes = CorrectIncorrect -
Question 25 of 36
25. Question
1 Watt = CorrectIncorrect -
Question 26 of 36
26. Question
When getting your supply air temperatures for measuring airflow, it is best to take the measurement ____________? CorrectIncorrect -
Question 27 of 36
27. Question
Use the formula below and select the correct answer for the airflow on this fan coil. CFM = BTUH Output/(temp difference x 1.08)
1 Watt = 3.414 BTUs
Volts x Amps = WattsMeasured voltage is 242vac
Measured amps are 39
Supply temperature is 109°
Return temperature is 72°CorrectIncorrect -
Question 28 of 36
28. Question
What are 2 ways to verify the BTUH input on a gas furnace? CorrectIncorrect -
Question 29 of 36
29. Question
What is the correct formula for measuring airflow on a gas furnace? CorrectIncorrect -
Question 30 of 36
30. Question
Use the formula and select the correct answer for calculating airflow of a gas furnace. CFM = BTUH Output/(temp difference x 1.08)
1 Watt = 3.414 BTUs
Volts x Amps = WattsBTUH Input is 110,000
BTUH Output is 88,000
Supply temperature is 122°
Return temperature is 72°CorrectIncorrect -
Question 31 of 36
31. Question
The best methods to measure and determine the CFM produced by a package unit is to __________? CorrectIncorrect -
Question 32 of 36
32. Question
When measuring static pressure it is critical the the positive + and negative – numbers get added or subtracted properly accordingly to the formula?
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Question 33 of 36
33. Question
If you have a package unit with a belt driven blower, it is “OK” to install a larger blower sheave to get increased airflow?
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Question 34 of 36
34. Question
All duct taps are created equally and have no effect on the system performance in regards to airflow delivery? CorrectIncorrect -
Question 35 of 36
35. Question
What year did FER (fan energy ratings) go into effect? CorrectIncorrect -
Question 36 of 36
36. Question
PSC motors are still being used in new furnaces being manufactured today? CorrectIncorrect