Chapter 2 & 3

Question 1

1. The two types of backflow are_________________and ____________________?

Answer 1

Backsiphonage
Backpressure

Question 2

Any type of cross connection or potential cross connection involving water that has additives or
substances that can create a danger to health is best defined by which category of hazard.

Answer 2

Severe Hazard

Question 3

List the four types of health hazards associated with cross connection

Answer 3

Communicable Disease
Chemical Hazard
Radiological Hazard
Physical Hazard

Question 4

When performing the field test on a
2 ½” Double Check Valve Assembly, what type(s) of shut off
valves are to be expected

Answer 4

Resilient seated gate valves or butterfly valves

Question 5

A piping arrangement piped vertically 35’ (minimum) in a loop and intended to protect against a
backsiphonage is called a

Answer 5

Barometric Loop

Question 6

The two categories of mechanical backflow preventers are

Answer 6

Testable
Non Testable

Question 7

How tall must a column of fresh water be to equal 1.0 psi?

Answer 7

27 3/4”

Question 8

Which third body approval organization certifies backflow preventer standards in Canada?

Answer 8

Canadian Standards Association
(CSA)

Question 9

__________ or ___________ are approved backflow assemblies used for Moderate Hazard cross
connections

Answer 9

DCVA
DCDA

Question 10

How much does a cubic inch of fresh water weigh (psi)?

Answer 10

0.0361psi