Backflow boyz
Backflow Prevention Quiz
Test your knowledge on backflow prevention devices and their installation! This quiz covers various aspects of backflow prevention methods including regulatory requirements and best practices.
Join other professionals in the plumbing industry to enhance your understanding and identify areas for improvement.
- Multiple choice questions
- Engaging and informative
- Suitable for professionals
An RP backflow preventer may be installed in a pit:
If the pit is connected to a gravity drain.
If the pit is well drained due to soil conditions.
If the test ports are capped off.
Not allowed
As a punishment for stupid apprentices
If a BFP is installed at a height greater than 1.5 m:
An extension ladder is required
A scissor lift is required
A forklift with a personal cage is required
A permanent fixed the platform is required
Walk off the site and let foreman figure it out, this is beyond your pay grade
Spring tension loss on the #1 check valve of a DCVA must be:
Between 1 and 5 psid
Not less than 1 psid
Between 5 and 10 psid
Not less than 2 psid
When calculating the buffer for a RP it must be:
Greater than 2 psid
Greater than 3 psid
3 psid or greater
What’s a buffer
When testing the #2 check valve on an RP:
The reading on the test kit must hold for two minutes and be recorded
The reading on the test kit must hold for two minutes and the valve is recorded as closed tight.
This is a test for a DCVA.
This is a test for a PVB.
When installing a BFP on the vertical:
It is OK as long as you hang it properly
You must consult the manufacturer to be sure it can be installed on the vertical
Whatever the owner of the building says
None of the above
Which of the following results would constitute a pass when testing a DCVA:
| #1 Check Valve | #2 Check Valve | |
| A. | 0.9 psid | 1.2 psid |
| B. | 1.2 psid | 0.9 psid |
| C. | 3.9 psid | 0.8 psid |
| D. | 5.1 psid | 1 psid |
A
B
C
D
When installing an AVB it’s critical limit must be at least:
300 mm above flood level rim
150 mm above flood level rim
35 mm above flood level rim
25 mm above flood level rim
The minimum height of a barometric loop is:
10 m [32.8 ft]
30 m [98.4 ft]
10.7 m [35 ft]
5 m [16.4 ft]
DCAP stands for:
Double check with atmospheric port
Double check with intermediate vent
Dual check with intermediate vent
Dual check with atmospheric port
Don’t cry during anal penetration
The five clearance requirements for the instillation of a testable BFP are:
Behind 300 mm, Above 300 mm, in front 20 mm, minimum height off floor 750 mm, Maximum height off floor 750 mm, below relief valve 300 mm
Behind 20 mm, Above 300 mm, in front 750 mm, minimum height off floor 750 mm, Maximum height off floor 1500 mm, below relief valve 300 mm
Behind 30 mm, above 300 mm, in front 750 mm, minimum height off the floor 750 mm, maximum height off floor 1500 mm, below relief valve 300 mm
Behind 750 mm, above 300 mm, in front 750 mm, minimum height of floor 750 mm, maximum height of floor 1500 mm, below relief valve 300 mm
Choose the correct answer
101.455
101.46
100.4
100
30
102
Find the total force at the bottom of a 2 inch diameter riser 120 feet high
Bonus question! When testing the relief valve on an RP, if the relief valve will not dump no matter how much valve B is opened, this indicates:
The test kit is fucked and needs to be recalibrated
The relief valve needs to be repaired
#2 shut off is not holding
Cocks weren’t tested enough
#1 shut off is not holding
This scenario cannot occur
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