Opflow Cert. Set 13

Front 1

What is the maximum theoretical suction lift of a centrifugal pump at sea level?

Back 1

34 ft

Front 2

What type of personal protective equipment should an operator wear when handling hypochlorites?

Back 2

Eye goggles

Front 3

How much water systems serving a population of more than 10,000 distribute the consumer confidence report to consumers?

Back 3

Mail

Front 4

Complaints of poor water quality will most likely occur in which type of water main layout?

Back 4

Tree

Front 5

Pump seals can be classified as

Back 5

Packing ring or mechanical

Front 6

If the chlorine dose is 4.25 mg/L and the chlorine residual is 1.20mg/L

what is the chlorine demand?

Back 6

3.05 mg/L

Front 7

The Safe Drinking Water Act defines a public water system that supplies pipe water for human consumption as one that has

Back 7

15 service connections or serves 25 or more people for 60 or more days/ year

Front 8

Records on turbidity analysis should be kept for a minimum of

Back 8

5 years

Front 9

Why should an operator contact area companies with underground utilities before starting it on the ground repair job?

Back 9

To ask the companies to locate and mark the location of their utilities in the area of the repair job

Front 10

Which effect will caustic soda have on water?

Back 10

Increase the pH of the water

Front 11

What is the most probable cause of a pinging sound coming from a pump?

Back 11

Cavitation

Front 12

In the multiple-tube to fermentation method, what is the sequence of growth media?

Back 12

LTB, BGB, and EMB

Front 13

Which of the following contributes to the creation of algae blooms in reservoirs?

Back 13

Increased nutrients

Front 14

The riparian doctrine is sometimes called the

Back 14

rule of reasonable sharing

Front 15

We should bacteriological samples be collected in the distribution system?

Back 15

At locations that are representative of conditions within the system

Front 16

What type of motor is the simplest of all AC motors, with rotors consisting of a series of bars place in slides?

Back 16

Squirrel cage

Front 17

What does SCADA for?

Back 17

Supervisory Control and Data Acquisition

Front 18

Which is the main purpose of priming?

Back 18

Replace air with water inside the pump

Front 19

Which of the following best defines the term static water level?

Back 19

Water level in a well window well isn't in operation

Front 20

AWWA recommends 5/8-in. meters be

tested every

Back 20

10 years