Water Operator Cert. Study Guide- Perform Security, Safety, And Administrative Procedures & Evaluate Characteristics Of Source Water

Front 1

Which is the most important thing to consider in automatic start up after a power failure?

Back 1

Operator safety

Front 2

At which range of temperatures will fusible plugs on chlorine cylinders melt?

Back 2

157 to 162°F

Front 3

When a chlorine cylinder or container is changed, a new gasket should be used ______

Back 3

Every time

Front 4

Which is the best type of gasket to use when connecting a chlorine cylinder or container to the chlorine feed system?

Back 4

Lead gasket

Front 5

Which part of the human body is the most vulnerable to allowing microorganisms to enter it?

Back 5

Eyes

Front 6

Chlorine storage rooms should______

Back 6

Have a window in the door so an operator can look into the room to detect any abnormal conditions

Front 7

Chlorine gas ________

Back 7

Will support combustion

Front 8

Which will occur if dry Alum and quicklime are mixed together?

Back 8

Highly explosive hydrogen gas will be released

Front 9

Before an authorized entrant enters a permitted confined space ,______

Back 9

The internal atmosphere of this place must be tested to measure oxygen content, presence of flammable gases and Vapors, and potentially toxic air contaminants

Front 10

Fluoride injection should be as far away as possible from any chemical that contains?

Back 10

Calcium

Front 11

Water treatment Personnel should only use self contained breathing apparatus equipment that has been approved by?

Back 11

The National Institute of occupational safety and health (niosh)

Front 12

If a substantial chlorine leak incident occurs, which agency should be called for actual Hands-On assistance?

Back 12

The chemical transportation Emergency Center

Front 13

In regards to safety, what activated carbon will remove which from the air?

Back 13

Oxygen

Front 14

An employee's average Airborne exposure in any 8 hour shift in a 40 hour work week that should not be exceeded is called?

Back 14

Time weighted average (twa)

Front 15

Sites are required to do a site assessment under the process Safety Management (PSM) regulations (OSHA) if the facility in a single process has more than how many pounds of chlorine?

Back 15

1,500 lb

Front 16

Which factor is used to express the relative volatility of a substance?

Back 16

Henry's constant

Front 17

Ammonia gas can be fatal to humans at a concentration as low as?

Back 17

2,000 ppm

Front 18

Which emergency kit is for chlorine tank cars?

Back 18

Kit C

Front 19

Each year approximately what percentage of confined space deaths are would-be Rescuers?

Back 19

67%

Front 20

When a water source is destroyed or damaged due to some disaster that causes total contamination, which would be a short-term goal?

Back 20

Draw water from an adjoining system or systems

Front 21

The organisms used to indicate the likelihood that pathogenic bacteria may be present are?

Back 21

Coliform bacteria

Front 22

Which adverse effects does the secondary containment manganese have?

Back 22

Discolored laundry and changed taste of of water, coffee, tea and other beverages

Front 23

In general, which causes an increase in taste and odors when natural waters lack dissolved oxygen?

Back 23

Anaerobic decomposition

Front 24

A physical property, as opposed to a chemical property, important to water treatment is?

Back 24

Turbidity

Front 25

Which are the two principal chemicals that cause water hardness?

Back 25

Calcium and magnesium

Front 26

Temporary hardness is caused by?

Back 26

Calcium bicarbonate

Front 27

Which type of algae would most likely be found in nutrient-rich waters?

Back 27

Blue-green algae

Front 28

The quantity of dissolved oxygen in water is a function of?

Back 28

Temperature, pressure, and salinity

Front 29

Most of the carbon dioxide in groundwater originates from?

Back 29

Biological oxidation of organic matter

Front 30

At which temperature does the maximum density of water occur?

Back 30

4.0°C

Front 31

When water freezes it expands by ______ of its original volume?

Back 31

One-ninth

Front 32

Which type of polar bonds are between the hydrogen atoms and the oxygen atom in water?

Back 32

Covalent

Front 33

Which would be the most probable solution to control algae in the source water if the algae were clogging the filters at the water plant?

Back 33

Control nutrients

Front 34

Total dissolved minerals in rainwater are typically close to?

Back 34

10.00 mg/L

Front 35

Because manganese is only slightly soluble, it is rarely found in surface waters above a concentration of?

Back 35

1.0 mg/L

Front 36

Where does the microbial growth that affect groundwater sources and thus the treatment for removing iron and manganese occur?

Back 36

Where aerobic and anaerobic conditions meet

Front 37

Which conditions will +Eh values of water support?

Back 37

Aerobic activities

Front 38

Radon is a radioactive decay daughter of?

Back 38

Radium 226

Front 39

Which algal genera are most likely to cause taste-and-odor problems when abundant in the water?

Back 39

Volvox

Front 40

Shellfish grown in polluted Waters have been known to contain the organism that causes?

Back 40

Infectious hepatitis