Water Distribution Sample Test ONE Questions and Answers 100% Correct. The difference betw, Exams of Water Resources Planning and Management

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Water Distribution Sample Test ONE

Questions and Answers 100% Correct.

The difference between the static groundwater level and the pumping level is the Radius of influence Drawdown Cone of depression Watershed - ANSWER-Drawdown A customer complaint about the presence of brown floc in tap water can best be handled by Denying that it is from your pipes Scheduling a visit to the premises later in the week Investigating the problem as soon as possible Asking the customer to send a sample to the division of health - ANSWER-Investigating the problem as soon as possible The term "aquifer" relates to which one of the following? Surface water Lake Stream Groundwater - ANSWER-Groundwater One indication of corrosive water is a high concentration of Algae odors Carbon dioxide Carbonates

Total dissolved solids - ANSWER-Carbon dioxide Cathodic protection means protection against Contamination Corrosion Hardness Infiltration - ANSWER-Corrosion The primary reason for the use of a dry barrel fire hydrant is to Allow easy maintenance of the hydrant Keep the barrel from rusting Minimize water hammer Keep the hydrant from freezing - ANSWER-Keep the hydrant from freezing The component parts of a well include all of the following except Sanitary seal Well screen Pressure switch Cement grout - ANSWER-Pressure switch At the same barometric pressure, the amount of dissolved oxygen in cold water tends to be _________ the amount of dissolved oxygen in warm water. Less than More then More or less then (depending on the biological oxygen demand) The same as - ANSWER-More than Which of the following is the principle constituent in water that causes corrosion of metals?

Alkalinity Dissolved oxygen Hydrogen sulfide Sodium chloride - ANSWER-Dissolved oxygen Which component of a centrifugal pump moves the water? Cylinder Impeller Shaft Valve - ANSWER-Impeller A record containing the size, location, and ties of water mains; valves; hydrants; tanks; reservoirs; and pump stations is called a Road atlas Comprehensive map System atlas Charles atlas - ANSWER-Comprehensive map What term describes water that is suitable for drinking? Potable Palatable Colorless Clean - ANSWER-Potable Velocity of flow in mains is usually expressed in terms of Feet per second Gallons per minute

Liters per foot Milligrams per litre - ANSWER-Feet per second A "competent person" at an excavation work site Is capable of identifying hazards and has the authority to take corrective measures Is responsible for accidents at the work site Must be a professional engineer Must fill out a written inspection prior to workers entering an excavation - ANSWER-Is capable of identifying hazards and has the authority to take corrective measures Hydrogen sulfide gas smells like Dead fish Fuel gas Rotten eggs Skunk - ANSWER-Rotten eggs Which of the following methods can be used to remove high iron content from a well supply? Oxidation and filtration Aerate it with carbon dioxide Decreased flow Retain until it settles out - ANSWER-Oxidation and filtration Hardness may be expressed in Milligrams per litre as CaCo Milliliters per litre Pounds per day Pounds per million gallons - ANSWER-Milligrams per litre as CaCO

The basic unit of electrical power is the Coulomb Ohm Volt Watt - ANSWER-Watt Check valves are used to Permit air to escape from the pipe Permit flow in only one direction Regulate velocity Stop flow in both directions - ANSWER-Permit flow in only one direction Beards or long sideburns prohibit an operator from safely Acting as a lifeline attendant Entering a confined space Serving as a first-aid specialist Wearing the face mask of a self-contained breathing apparatus - ANSWER-Wearing the face mask of a self-contained breathing apparatus The water table is defined as the Pumping level in a well Upper surface of the groundwater Water level in a reservoir Water level obtained in a well after penetrating several aquifers - ANSWER-Upper surface of the groundwater The shaft speed of an electric motor is most commonly expressed in units of Feet per second per second

Feet per second Revolutions per second Revolutions per minute - ANSWER-Revolutions per minute A coupon test installation in a distribution system is used to Determine the systems water quality Determine the rate of scaling or corrosion Calculate the daily treatment changes Assist in calculating hydrant flows - ANSWER-Determine the rate of scaling or corrosion Disease-causing bacteria are known as Coliforms Noncoliforms Nonpathogenic Pathogenic - ANSWER-Pathogenic Normally surface water and groundwater have a pH range of 9.0 to 10. 6.8 to 8. 1.5 to 4. None of the above - ANSWER-6.8 to 8. Which is the best definition of turbidity in water? Anything in water that scatters light Sequestered iron and manganese particles The amount of dissolved material in water The combined optical effect of pH, chlorine, and color - ANSWER-Anything in water that scatters light

A "competent person" must inspect excavations and adjacent areas for hazards Continuously while workers are inside the excavation Hourly while workers are inside the excavation Prior to the start of work each day only Daily prior to the start of work, and as needed throughout the shift - ANSWER-Daily, prior to the start of work, and as needed throughout the shift The component of a centrifugal pump sometimes installed on the end of a suction pipe to hold the priming is known as a Casing Drain Foot valve Ventilator - ANSWER-Foot valve The principal purpose of an altitude valve on an elevated tank is to Control maximum filling level in distribution storage Maintain constant static head in the distribution system Maintain uniform flow from elevation storage Restrict water flow to high-demand areas - ANSWER-Control maximum filling level in distribution storage The term "primacy" means the Authority by the states to supersede the USEPA drinking water regulations Authority by the USEPA to supersede state drinking water regulations Requirement for states to maintain drinking water regulations more stringent than the USEPA regulations Primary authority for implementation and enforcement of drinking water regulations - ANSWER-Primary authority for implementation and enforcement of drinking water regulations

Reciprocating positive-displacement pumps are also known as Air-lift pumps Centrifugal pumps Piston pumps Pneumatic ejector - ANSWER-Piston pumps A common method for removing hydrogen sulfide from water is Aeration Coagulation Filtration Sedimentation - ANSWER-Aeration The treatment process designed to kill pathogenic organisms is Disinfection Oxidation Pasteurization Sterilization - ANSWER-Disinfection Lead in drinking water can result in Prostate cancer in men Impaired mental functioning in children Stomach and intestinal disorders Reduced white blood cell count - ANSWER-Impaired mental functioning in children A disease that might be transferred to a new victim through water is Diphtheria Gonorrhea

Malaria Typhoid - ANSWER-Typhoid An average percentage range for unaccounted for water in a fully metered system is 0 to 5% 6 to 10% 11 to 15% 16 to 20% - ANSWER-11 to 15% A cross connection is defined as a connection between Potable water system and nonpotable water system A high pressure system and a low pressure system Two different sized pipes A cross on a water main - ANSWER-A potable water system and nonpotable water system Backsiphonage is caused by Excessive pressure in the line Partial vacuum in the line A small leak Water hammer - ANSWER-Partial vacuum in the line When the pumping rate is increased, the effect on the cone of depression is to Decrease the drawdown Decrease the radius of influence Lower the pumping level Raise the pumping level - ANSWER-Lower the pumping level

Which chemical is most often used to disinfect public water supplies? Bromine Chlorine or chlorine compounds Iodine Ozone - ANSWER-Chlorine or chlorine compounds The purpose of a surge tank is to Control water hammer Prevent contamination of water by backflow Provide emergency storage Provide high pressure water - ANSWER-Control water hammer The presence of total coliforms in drinking water indicates The potential presence of pathogens The presence of pathogens The absence of an adequate chlorine residual An urgent public health problem exists - ANSWER-The potential presence of pathogens The primary sources of trihalomethanes (THMs) in drinking water is Industrial solvents Polymer coagulants Leaching from paint linings in water storage tanks The reaction of chlorine compounds and organic matter - ANSWER-The reaction of chlorine compounds and organic matter