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77 Cards in this Set
- Front
- Back
The flow or current in an electrical Circuit is measured as. |
Amps |
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Infiltration and inflow must be controlled to Prevent. |
Hydraulic overloads |
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Which of the following is a primary indicator of bearing failure. |
Noise coming from pump. |
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The valve most often used for flow control is. |
Globe Valve |
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When describing a particular gas LEL stands for. |
Lower explosive limit |
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Collection systems gases that have a specific gravity greater than 10 are |
Heavier than air |
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With pressure sensing controllers such as the bubbler system a blockage in the airline would. |
Signal the pump to run and result in lower than normal wet well levels. |
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Pumps connected in series increase |
Pressure |
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Cavitation is caused by. |
Is sufficient NPSH |
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The pressure that a pump must operate against is measure in. |
Psi |
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The primary purpose of check Valves is to prevent. |
Water from flowing in Two directions. |
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If only two rings of packing are used in the stuffing box, at how many degrees should the joints be staggered. |
90 to 180 degrees |
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The zone of influence is defined as |
The distance from a wedwell that the cone of depression affects the normal water level. |
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What type of pump is most often used by public water systems. |
Velocity |
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When a portable water supply used to provide clean water to water seals on pumps, the connection should be made with a________ to portable water supply. |
Vacuum breaker |
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What happens to a pump? If the back pressure on the pump is allowed to drop too low and the pump is operated for a prolonged period of time. |
Efficiency will drop off and the pump will heat up. |
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The part of the chlorine cylinder to melt at 150 to 165°F to prevent a cylinder from exploding in the event of fire is. |
The Fusible plug |
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Coagulation occurs during the first. |
1 to 5 Seconds |
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Which of the following should be the safety action to take in the event of a major chlorine leak. |
Call the fire department |
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When non portable water is connected directly to a portable water system, the minimum acceptable method of eliminating the cross connection is. |
An air gap between two systems or a reduced pressure zone device. |
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A hypochlorinator is used to. |
Feed liquid chlorine solution into a water supply. |
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One ton chlorine tanks have. |
Fusible plugs located at the valves |
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When litmus paper is immersed in acid solution, the paper turns. |
Red |
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Which of the following is not Typical of a submersible pump. |
Requires water lubrication |
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What health risk is associated with nitrate in water. |
methemoglobinemia |
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Which of the following best defines the term drawdown. |
A changing water elevation from the normal level to the pumping level. |
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Which of the following is likely to cause a decreasing drawdown and unchanging static water level. |
Pump is losing efficiency. |
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If a pump has excessive internal leakage, the operator should check. |
The wear ring |
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The metal strip in an electrical fuse will melt from the heat caused by. |
High amperage |
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What is pressure head caused by. |
Water elevation. |
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Exhaust from a chlorinatal room should be taken from. |
The floor level |
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Before repairing a pump's electrical circuit, which of the following actions should you take. |
Disconnect the secret breaker. Place the red tag stating " Do not activate " and lock out. |
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How often should a seal ball bearing in an electrical motor be Lubricated. |
Never |
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Maintenance required of bubbler. Two level indicators includes checking the. |
Air tube |
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Which valve is most suitable for a throttling application. |
Ball Valve |
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Flexible couplings used to connect the motor to the pump shaft transmit. |
Power efficiency and effectively from one shaft to the other. |
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Cavitation in pumps is caused by pumping. |
Flow rate considerably higher than design flows. |
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What type of pump is a reciprocating pump. |
Positive displacement |
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The principal purpose of an altitude valve on an elevated tank is to. |
Control maximum filling level in the distribution storage
|
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What is the most probable cause of a pinging sound coming from a pump. |
Cavitation |
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Centrifugal, positive displacement And turbine are all. |
Types of Pumps |
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A mechanical ventilation system for the wet well portion of a lift station should be able to exchange the air in a wetwell a minimum of____ Times per hour. |
12 |
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Vortexing is likely to occur. |
If the wet well level is too low and or the pump flow rate is too high. |
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Throughout a link to discharge valve on a centrifugal pump will result.. |
An increased head pressure, lower flow rates and decreased Amperage draw. |
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Reciprocating positive displacement pumps are also known as. |
Piston pumps |
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What information must be on a warning tag attached to a switch that has been locked out. |
Signature of a person who locked out the switch. And who is the only person out the rise to remove the tag. |
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What type of pump has high efficiencies, 0 to 95% at very high pressure, impellers that are very close fitting and high maintenance cost. |
Vertical turbine |
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What is the primary purpose of well grouting |
Prevent surface water contamination from entering the water that is being drawn into the well. |
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Which of the following best defines the term static water level. |
Water level in a Well, when the well is not in operation. |
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Which of the following valves can be used to control pressure. |
Globe valve |
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Using water on gas chlorine leak wil |
Make the leak worse |
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If the Amperage drawn by a centrifugal pump is lower than what is normal for that pump, one possible cause is. |
A close valve on the discharge side of the pump |
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What type of Motor's rotor requires no windings and has Low starting torque. |
Split phase |
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If a pump loses prime after starting, this may be caused by. |
Suction problems |
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Which of the following substances posed an immediate health threat whenever standards are exceeded. |
Coliform and nitrate. |
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Which of the following is a measure of a material's opposition to the flow of electric current. |
ohms |
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If the speed of a centrifugal pump is increased and the head remains the same, the gallons per minute output will. |
Increase |
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The mayor difference between dynamic head and static head is. |
Friction head.
|
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Proper protection against exposure to toxic acids, bases And other hazardous liquids can be best done with. |
Proper boots and gloves. |
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When the oxygen contact level is__________it can be fatal. |
Below 10% |
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As the wet well level Rises, the effect on the pump is. |
The net positive suction head available increases. |
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Muddy water and increased flow during rainfall Are symptoms of. |
Infiltration |
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A co-worker has just passed out. You should first. |
Check for breathing and heartbeat |
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Death from an electrical shock can occur with amperage as low as. |
33 miliamps |
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Bacteria, viruses or cysts that can cause a disease are called. |
Pathogens |
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A man hole has an oxygen level of 17%. This will be considered. |
Oxygen deficient |
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A gasoline driven air ventilator located close to a confined working area can create an atmospheric hazard due to |
Carbon monoxide generation |
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After initial full service operation, greased lubrication bearings should be regreased at what frequency. |
3 to 6 months |
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What prevents any solution or water from backing up into the chlorine line. |
Check valve |
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Packing should be replaced when tightening the _________ no longer controls the leakage.
|
Packing gland.
|
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Mechanical seals are more appropriate for pumps operating under which of the following conditions. |
High Suction head |
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Pump seals can be classified as. |
Balanced or unbalanced |
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A chlorine gas mask should be provided. |
in close proximity to, but outside of the chlorine room door. |
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At a pumping station equipped with centrifugal pumps. What caused the discharge pressure to suddenly increase and discharge quantity to suddenly decrease. |
A discharge valve was closed A discharge valve was closed |
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When a fire hydrant is operated, it should be. |
Open fully. |
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One measure of an efficient manager is. |
Few employee grievances. |
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To sample for ph you should collect |
A grab sample |