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100

11.3 gallons of water = __ cubic feet water?

  • 1
  • 0.67
  • 1.51
  • 2.1
  • 1.51       7.48gal/1cuft=11.3gal/x=1.51cuft.
100

What is the purpose of wear rings in a centrifugal pump?

  • Prevent excessive external water circulation between the suction and discharge side of a pump
  • Allow excessive internal water circulation to occur between the suction and discharge
  • Keep pumping GPM consistence
  • Prevent excessive internal water circulation between the suction and discharge sides of a pump
  • Prevent excessive internal water circulation between the suction and discharge sides of a pump
100

The allowable voltage deviation above or below the value stamped on a motor's nameplate is?

  • 15%
  • 12%
  • 10%
  • 5%
  • 10%
100

You have two identical pumps at the wastewater pumping station when it is operating it is best to adjust the controls so that...

  • The pumps run simultaneously
  • The one pump is just for reserve
  • The pumps alternate in operation
  • None of the above
  • The pumps alternate in operation
100

Preventive maintenance for equipment should be done?

  • According to manufacturer recommendations.
  • When time permits.
  • Once every week.
  • After a breakdown.
  • According to manufacturer recommendations.
200

What is the difference between grab sampling and composite sampling?

  • Determined by the number of samples pulled.
  • Determined by the time it is pulled
  • Determined by the agency that pulls the sample
  • Determined by when you get results back.
  • Determined by the number of samples pulled.
200

The ratio of a pump water Hp output to the kW input to the motor is known as?

  • Wire-to-water efficiency
  • Water Hp
  • Energy consumed
  • Brake Hp efficiency
  • Wire-to-water efficiency
200

Find the chlorine demand for the Town of Lexington with the following parameters: Treats 5.1 MGD, 5.5 ppm polymer, 2.5 ppm gas chlorine, 1.1 ppm caustic soda, operates 20 hours per day. chlorine residual at furtherest end of distribution system 0.4 mg/l.

  • 0.9 mg/l
  • 1.7 mg/l
  • 2.1 mg/l
  • 2.5 mg/l
  • 2.1 mg/l      2.5 mg/l - 0.4 mg/l = 2.1 mg/l.
200

The slope of a sewer is measured by?

  • Entering each manhole
  • Calculating the difference in invert elevations over the length of the sewer line
  • Calculating the difference in crown elevation over the length of the sewer line
  • Calling a land surveyor
  • Calculating the difference in invert elevations over the length of the sewer line
200

A flow of 1 gpm is equal to?

  • 60 gph
  • 1 MDG
  • 10 gph
  • 60 gpm
  • 60 gph       (1 gal/min)(60min/hr)=60gph.
300

At what pH will Chlorine destroy bacteria most rapidly?

  • 10.5
  • 9.5
  • 8.5
  • 7.5
  • 7.5
300

The 4 characteristics on a pump graph are

  • Capacity, head, efficiency, and brake horsepower
  • Capacity, head, efficiency, and water horsepower
  • Head, size of pump, efficiency, and energy
  • Efficiency, head, energy use, brake horsepower
  • Capacity, head, efficiency, and brake horsepower
300

How may gallons per minute of water are flowing from a 6 inch water main if the flow rate is 3.7 cuft/sec?

  • 628.3 gpm
  • 1851.5 gpm
  • 1661 gpm
  • 679 gpm
  • 1661 gpm (3.7 cuft/sec)(7.48 gal/cuft)(60 sec/min)=1661 gpm.
300

By subtracting the base flow and infiltration from the total flow during wet weather you will have?

  • Exfiltration
  • Inflow
  • Infiltration
  • Average wet weather flow
  • Inflow
300

The agent responsible for reporting lab results to the regulatory agency is?

  • Sample collector.
  • Lab technician.
  • Board of Health chairperson.
  • Water system owner.
  • Water system owner.
400

What does SCADA stand for?

Supervisory, Control, & Data, Acquisition

400

The surface in a glass tube on the side of a water tank indicating the water level in the tank is called the?

  • Potentiometric surface
  • Hydraulic surface
  • Level surface
  • Piezometric surface
  • Potentiometric surface
400

What is the normal cause of electric motor failure?

  • Dirt
  • Friction.
  • Moisture.
  • All of the above
  • All of the above
400

What does CMOM stand for?

Capacity, Management, Operations, & Maintenance 

400

When mixing acid and water the correct procedure is?

  • Water is added quickly to the acid.
  • Water is added slowly to the acid.
  • Acid is added slowly to the water.
  • Acid is added quickly to the water.
  • Acid is added slowly to the water.
500

Which of the following are distribution system layout configurations?

  • Grid, Arterial-loop, Pressurized
  • Arterial-loop, Grid, Tree
  • Tree, Transmission, Arterial-loop
  • Tree, Arterial-hoop, Grid
  • Arterial-loop, Grid, Tree
500

___ alignment occurs when the centerlines of the pump and the motor shaft are offset.

  • Parallel
  • Angular
  • Horizontal
  • Rotational
  • Parallel
500

What could be the cause for a pump to deliver less than the expected rate of discharge?

  • Discharge head too high
  • Discharge head too low
  • Pump not properly primed
  • A check valve is closed downstream
  • Discharge head too high
500

What is the efficiency of a lift pump station motor if a 15 KW motor is required to run a 10 hp pump?

  • 89%
  • 74.6%
  • 81.5%
  • 77%
  • 74.6%   (15KW)(1.34 hp/KW)=20.1 hp. (15kp)/(20.1hP)100%=74.6%.
500

You and your crew have just installed a 10" PVC sewer line through a local ballfield. You have been asked to purchase enough grass seed to reseed the strip which is 1450 ft. long and 6 ft. wide. Each bag of seed covers 1,200 sqft. How many bags do you need to purchase?

  • 7 bags
  • 2 bags
  • 10 bags
  • 8 bags
  • 8 bags      (1,450 ft)(6ft)=8,700sqft/1,200sqft/bag=7.25 bags=8 bags
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