1.  What is considered normal flocculation time?

A. 1-4 minutes B. 5-9 minutes C. 10-14 minutes D. 15 minutes or more

2.  The minimum horizontal distance allowed between watermain and sanitary sewer is:

A. 35 foot B. 7 feet C. 10 feet D. 50 feet

3.  The health department requires a minimum of how much free chlorine residual at distant points of the distribution system?

A. .01 ppm B. .2 ppm C. 1.0 ppm D. 2.0 ppm

4.  The purpose a chlorine tank has a fusible plug is:

A. to identify the cylinder manufacturer B. take repeat samples C. Venturi tubes D. closing valves too fast

5.  A zeolite softening unit will replace calcium and magnesium ions with:

A. Cations B. iron residuals C. sodium ions D. Diatoms

6.  A pH reading of 2 means the water is:

A. acidic B. alkaline C. soft

7.  The floor grade of the well pumphouse must be at least ________ feet above the highest known flood level.

A. 1 B. 2 C. 4 D. 5

8.  Vent openings on reservoirs and clearwells should be:

A. grouted B. provided with an overlapping cover and padlocked C. checked daily during Winter D. screened

9.  The liquid that stands above a sediment or precipitate is referred to as the:

A. slough B. effluent C. sludge blanket D. supernatant

10.  Lead in drinking water can result in:

A. prostate cancer B. stomach disorders C. impaired mental functioning in children D. fluorosis

11.  A noisy and vibrating gate valve may indicate:

A. water hammer is occurring B. the valve needs repacking C. operating nut is loose D. cavitation is happening

12.  Sedimentation is a process that _____________ suspended matter.

A. settles B. coagulates C. flocculates D. filters

13.  Chlorine leaks can be detected around a chlorine cylinder by the use of:

A. soda ash B. lime C. ammonia D. hypochlorite

14.  The intake of a forced ventilation system for a chlorinator room should be located:

A. near the ceiling B. in the laboratory C. near the cylinder D. near the floor

15.  If an operator hears a pinging sound coming from a pump, what is the probable cause?

A. descaling B. cavitation C. corrosion D. hardness

16.  The best place to take a bacteriological sample is:

A. before the well check valve B. at a kitchen sink C. at an outside spigot D. at a service station bathroom sink

17.  Which of the following is used to measure flow?

A. flocculator B. drawdown well gauge C. hydraulic pump D. venturi meter

18.  As a water meter becomes worn with use, it tends to:

A. over-register B. under-register C. remain constantly accurate D. have excessive head loss

19.  The purpose of a surge tank is to:

A. control water hammer B. prevent contamination by backflow C. return backwash water D. provide emergency storage

20.  Iron and manganese form insoluble compounds by reacting with:

A. alum B. lime C. dissolved oxygen D. polyphosphate

21.  Cathodic protection means protection against:

A. chemical overfeeding B. carbon deposits C. total dissolved solids D. corrosion

22.  Chloramines are formed by the addition of chlorine and:

A. ammonia B. liquid nitrogen C. soda ash D. sodium fluoride

23.  Black stains on plumbing fixtures can be caused by:

A. magnesium B. manganese C. calcium D. anaerobic bacteria

24.  The difference between the static level and the pumping level of a well is called the:

A. cone of depression B. settling zone C. radius of influence D. drawdown

25.  Water that is high in sulfates can cause:

A. diarrhea B. staining of plumbing fixtures C. hardening of the arteries D. mottling of teeth

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