Test

Question 1

Your water supplier may interrupt water service to a customer when

Answer 1

Provisions in the cross connection, control, ordinance, or regulations are not met

Question 2

Backflow in a public water supply can be caused by

Answer 2

back pressure or backsiphonage

Question 3

An atmospheric vacuum breaker may have a downstream shut off valve

Answer 3

Under no circumstances

Question 4

The 1996 Federal safe drinking water act places, a primary responsibility for the quality of the public water supply on which of the following

Answer 4

Water purveyor

Question 5

An airgap must have

Answer 5

Two times the pipe diameter with the minimum of 1 inch separation

Question 6

An unprotected bypass around a reduced pressure principle backflow prevention assembly is

Answer 6

Not permissible

Question 7

The major concern of the water purveyor where an auxiliary water supply is utilized or maintained is to ensure that

Answer 7

Backflow protection is provided at the water service connection

Question 8

A pressure vacuum breaker may be installed with a

Answer 8

Shut off valve downstream

Question 9

Two types of cross connections are

Answer 9

Direct and indirect

Question 10

When nontoxic antifreeze chemicals are added to a fire suppression system, which of the following is required to protect the potable water supply

Answer 10

Reduced pressure principle backflow prevention assembly

Question 11

Internal protection refers to

Answer 11

Backflow protection at each point of use

Question 12

Lye is back siphoned from an open vat, without a cover over the top by a direct cross connection this constitutes a

Answer 12

Health hazard

Question 13

In responding to a suspected backflow incident, the water purveyor should

Answer 13

Implement emergency response plan

Question 14

The loading of the first and second check valves and reduced pressure principle backflow prevention assemblies are always

Answer 14

Different

Question 15

Undersized water, service, and distribution piping carrying water at high velocity

Answer 15

May cause back siphonage due to aspirator effect

Question 16

A perfect vacuum at sea level will raise water in a pipe a maximum of

Answer 16

33.9 feet

Question 17

The water supplier may require more frequent field testing of backflow prevention assemblies due to

Answer 17

High incident of field test failures of the assembly

Question 18

A differential pressure gauge is used to field test

Answer 18

Reduced pressure principle backflow assemblies

Question 19

The relief valve opening point of a reduced pressure principle backflow prevention assembly must open at or above

Answer 19

2.0 PSID

Question 20

When field testing a reduced pressure principle backflow prevention assembly, the number two testcock should be flushed

Answer 20

With caution to prevent premature opening of relief valve

Question 21

During a field test, the air inlet valve on a pressure vacuum breaker must open at or

Answer 21

Above 1.0 PSID

Question 22

Hose bib vacuum breakers should be located

Answer 22

On hose bibs as required by code

Question 23

The probable cause of an intermittent discharge of the relief valve on a reduced pressure principle backflow prevention assembly is

Answer 23

Fluctuations and supply line pressure

Question 24

When entering a vault containing a backflow prevention assembly does tester should

Answer 24

Check quality of the atmosphere prior to entry

Question 25

A service or containment protection, backflow prevention assembly is meant to protect

Answer 25

Public water supply system

Question 26

A vacuum breaker is used to protect against

Answer 26

Back siphonage

Question 27

A tester required to report backflow prevention field test information to the

Answer 27

Administrative authority

Question 28

Backflow prevention assembly shall be field tested

Answer 28

When required by local administrative authority

Question 29

Backflow prevention assemblies should be repaired

Answer 29

When field test results indicate failure

Question 30

Check valves of double check valve backflow prevention assemblies must be

Answer 30

Internally loaded

Question 31

A vacuum relief valve should be installed

Answer 31

Never as a backflow prevention assembly

Question 32

When repairing double check valve assemblies the tester should not

Answer 32

Modify internal components

Question 33

A backflow prevention assembly should make an abnormal humming noise during operation under which of the following conditions

Answer 33

Never

Question 34

The accuracy of fuel test gauges should be checked

Answer 34

At least annually

Question 35

The air gap drain funnel for the relief valve of a reduced pressure principle backflow prevention assembly

Answer 35

May not be sufficient to handle the full relief valve discharge

Question 36

How many tests are there on a pressure vacuum breaker

Answer 36

Two

Question 37

An atmospheric vacuum breaker must be installed

Answer 37

6 inches above highest outlet and all downstream piping

Question 38

A double check valve assembly is field tested with a

Answer 38

Differential gauge

Question 39

The type of backflows are

Answer 39

Back pressure and back siphonage conditions

Question 40

A Watermain break will most likely cause what condition

Answer 40

Back siphonage

Question 41

A reduced pressure principle backflow prevention assembly shall be installed

Answer 41

Readily accessible above grade

Question 42

Which component of a pressure vacuum breaker must be field tested first

Answer 42

Air inlet valve

Question 43

Each of the check valves in a double check valve assembly is designed to hold in the direction of flow a minimum static pressure of

Answer 43

1.0 psi

Question 44

An absolute pressure of 25 PSIA at sea level is equal to approximately what value engage pressure PSIG

Answer 44

10 PSIG

Question 45

Results of a field test on a backflow prevention assembly should not include, which of the following information on the report form

Answer 45

Date of manufacture

Question 46

To properly field test, a reduced pressure principle backflow prevention assembly

Answer 46

The inlet shut off valve must be open

Question 47

A pressure vacuum breaker may be used for backflow protection for which of the following conditions

Answer 47

Back siphonage health hazards

Question 48

The relief valve of reduced pressure principle backflow prevention assembly discharges in a static, no flow condition and stops discharging during the flow condition. The most likely cause is.

Answer 48

Fouled check valve number one

Question 49

A 2 inch atmospheric vacuum breaker when used on irrigation systems shall be installed at least _______ inches above the downstream piping outlets

Answer 49

Six

Question 50

When field testing a double check valve assembly and check valve number one leaks the tester

Answer 50

May test check valve number two before repairing check valve number one

Question 51

A backflow prevention assembly consisting of two independently operating internally loaded check valves located between two tightly closed shut off valves with four approximately located test cocks is a

Answer 51

Double check valve assembly

Question 52

A reduced pressure principle backflow prevention assembly must be installed at least

Answer 52

12 inches above grade

Question 53

Edible syrup in a cannery was forced into a drinking water line through a direct cross connection. This could’ve been prevented by the installation of a.

Answer 53

Double check valve assembly

Question 54

To properly solve a cross connection, contamination incident a qualified person should

Answer 54

Identify an isolate, the source of contamination, the affected area, and notify customers and the health department and take water samples

Question 55

To convert feet of head to pounds per square inch multiply by

Answer 55

0.4333

Question 56

The physical operation of a hose bib vacuum breaker is classified as a type of

Answer 56

Atmospheric vacuum breaker

Question 57

A contaminated auxiliary water supply is utilized to maintain high pressure of a fire sprinkler system to protect the potable water supply. What protection should be installed at the service connection.

Answer 57

Reduced pressure principle backflow prevention assembly

Question 58

When restoring service to the customer after testing a double check valve assembly the shut off valves are opened

Answer 58

Slowly number one shut off valve first

Question 59

It is possible to compensate for a leaking number to shut off valve during the field test of a reduced pressure principle backflow prevention assembly by attaching a temporary bypass hose from

Answer 59

Number one test cock, to number four test cock

Question 60

When field testing a pressure vacuum breaker near a ceiling, the gauge should

Answer 60

Be placed at the same elevation as the assembly

Question 61

Which of the following could create a closed water system if installed in the service supply line

Answer 61

Backflow prevention assembly

Question 62

A total cross connection control program should be coordinated with

Answer 62

Plumbing inspector, local health department, water purveyor

Question 63

The temperature increases in a closed plumbing system. This is an example of.

Answer 63

Thermal expansion

Question 64

The maximum head loss across a double check valve from zero to rated flow is

Answer 64

10.0 psi

Question 65

Which of the following conditions would not be a hazard to a public water supply?

Answer 65

A reduced pressure principle backflow prevention assembly installed on a cooling tower feed line that is tested twice a year

Question 66

During the held test of a leaking check valve number two on a reduced pressure principle backflow prevention assembly pressure is bypassed through the gauge from test cock number two to test cock number four this procedure will

Answer 66

Cause the differential pressure reading to drop and cause the relief valve to open

Question 67

During the field test of a check valve in a pressure vacuum breaker, the high bleed needle valve is left open this procedure will

Answer 67

Reduce the pressure between the check valve and the number one shut off valve

Question 68

When field testing a double check valve assembly check valve number one is found to be leaking. The next step is to.

Answer 68

Test check valve number two

Question 69

The differential pressure gauges used for field testing backflow prevention assemblies read in minimum increments of

Answer 69

.1 PSID

Question 70

After the installation of a reduced pressure principle backflow prevention assembly, the number one shut off valve is turned on to establish water pressure within the assembly. Upon opening the number one shut off valve. The relief valve discharge is continuously this discharge may be an indication of.

Answer 70

A foul check valve number one

Question 71

The spring and the relief valve of a reduced pressure principle backflow prevention assembly is designed to

Answer 71

Open the relief valve

Question 72

During the test of a check valve on a pressure vacuum breaker water continues to flow from the test cock number two. This is an indication of.

Answer 72

Leaky number one shut off valve

Question 73

Any pressure less than that exerted by the atmosphere is defined as a

Answer 73

Vacuum

Question 74

Performance design specifications of reduced principle backflow prevention assemblies, require that the differential pressure check valve number 1 be ______ PSID greater than the opening point of the relief valve

Answer 74

3.0

Question 75

How many tests are required on a reduced pressure principle backflow prevention assembly

Answer 75

Four

Question 76

The relief valve of a reduced pressure, principle backflow prevention assembly discharges, continuously during both flow and no flow conditions. The most probable cause is.

Answer 76

Foul relief valve

Question 77

To exert a pressure of one PSI at the base of a column of water, the column would have to be

Answer 77

27.75 inches high