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Questions and Answers
What is the primary function of a pump in industrial plants?
What is the typical power requirement of a lubricating oil pump?
Which type of pump is used to supply water to plant fire suppression systems?
What is the primary function of a boiler feedwater pump?
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What is the range of temperatures that pumps can handle?
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What type of pump is used to pump water through heat exchangers?
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What is the primary purpose of anchoring a pump to a firm location?
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What is the force exerted by one liter of pure water at 4°C on a unit area of one square meter?
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What is the relationship between pressure, density, acceleration due to gravity, and height of liquid?
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What is the effect of the shape of the piping system on the pressure at its base?
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What is the purpose of translating pressures into equivalent head in meters in pumping theory?
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What is the density of mercury compared to water?
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What is the effect of the density of the liquid being pumped on the pressure developed by a pump?
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What is the primary consideration for locating pumps?
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What is the pressure exerted by a liter of water at the base of a container with an area of 0.0049 m²?
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What is the phenomenon described in Figure 1?
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What is the definition of static head in a pumping system?
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What is the static discharge head?
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What is the static suction lift?
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What is the maximum suction lift of a pump at sea level?
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Why should centrifugal pumps be placed close to, or preferably below, the water supply?
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What is the pressure head?
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What is the total static head?
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What is the dynamic head?
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Why does the atmospheric pressure vary with altitude?
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What is the reason for the pump to lift water when it draws from a supply tank located below its centre line?
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What is the primary source of resistance in pipes, valves, and fittings?
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What is the relationship between friction head and fluid flow rates?
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What is the purpose of Net Positive Suction Head (NPSH)?
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What is the characteristic of a positive displacement pump?
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What is the main difference between reciprocating and rotary pumps?
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What is the purpose of the suction valves in a reciprocating pump?
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What is the formula to convert kinetic energy to potential energy?
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What is the total dynamic head composed of?
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What is the purpose of the discharge valves in a reciprocating pump?
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What is the type of pump that moves liquid by creating a pressure differential?
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What is the primary reason why fluid is expelled from the gear pockets in gear pumps?
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What is a main difference between gear pumps and rotary lobe pumps?
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In a sliding vane pump, what causes the size of the pockets to decrease?
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Why is a pressure relief device necessary in a positive displacement pump?
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What is the primary advantage of peristaltic pumps in feedwater treatment and chemical dosing systems?
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In a progressive cavity pump, what is the function of the liquid being pumped?
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What is a characteristic of progressive cavity pumps?
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What is the primary mechanism of dynamic pumps?
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In a centrifugal pump, what is the primary function of the impeller?
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What is a common application of progressive cavity pumps?
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What happens when the pressure inside a centrifugal pump drops below the vapour pressure of the liquid?
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Why is it important to avoid power surges in buildings with large electric lighting loads?
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What happens when a centrifugal pump is started with a closed discharge valve?
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What is the main characteristic of a regenerative pump?
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What is the main consequence of cavitation in a centrifugal pump?
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Where does cavitation typically occur in a centrifugal pump?
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What is the main consideration when selecting materials for a diaphragm?
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What is the difference between a single-acting and a double-acting pump?
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What is the purpose of the suction ball check in Figure 5?
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What is the advantage of a double-acting pump over a single-acting pump?
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What type of pump is shown in Figure 7?
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What is the characteristic of diaphragm pumps that makes them suitable for pumping corrosive fluids?
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How do rotary pumps achieve high pressure without pulsations?
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What is the function of the gears in a rotary gear pump?
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What is the advantage of using a diaphragm pump for pumping chemicals?
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What is the purpose of the valves in a positive displacement pump?
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What is the primary purpose of the volute casing in a radial flow centrifugal pump?
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What is the result of throttling the discharge valve on a centrifugal pump?
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What is the characteristic of a centrifugal pump that differentiates it from a positive displacement pump?
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What is the purpose of the stationary diffuser vanes in a diffuser centrifugal pump?
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What is the common application of axial flow pumps?
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What is the result of running a centrifugal pump with its discharge valve shut for extended periods of time?
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What is the direction of the liquid flow in a radial flow centrifugal pump?
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What is the purpose of the impeller in a centrifugal pump?
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What is the characteristic of a mixed flow pump?
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What is the effect of shutting the suction valve on a centrifugal pump?
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What is the primary function of a circulating water pump in an industrial plant?
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What is the range of power requirements for pumps in industrial plants?
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What type of pump is used to supply feedwater to the boiler in an industrial plant?
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What is the primary function of a fire pump in an industrial plant?
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What type of pump is used to supply fuel to oil burners in an industrial plant?
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What is the characteristic of pumps used in industrial plants that allows them to handle extreme temperatures?
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What is the primary factor that affects the pressure exerted by a column of liquid on the base of a container?
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What is the relationship between the pressure and height of a liquid in a container?
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What is the purpose of anchoring a pump to a firm location?
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What is the advantage of using head instead of pressure in pumping theory?
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What is the consequence of ignoring the density of the liquid being pumped?
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What is the significance of Pascal's Paradox in pumping theory?
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What is the purpose of using reinforced concrete foundations for large pumps?
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What is the relationship between the force of gravity and the weight of a liquid?
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What is the advantage of using a small pump instead of a large pump?
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What is the consequence of placing a pump at the bottom of a lake or well?
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What is the primary effect of increasing fluid flow rates on friction head?
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Which type of pump converts kinetic energy to potential energy?
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What is the purpose of calculating Net Positive Suction HeadAvailable (NPSHA)?
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What is the characteristic of a positive displacement pump that makes it suitable for pumping liquids at a constant flow rate?
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What is the primary component of a reciprocating pump that creates a void to move liquid?
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What is the result of a pump running with its discharge valve shut for an extended period of time?
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What is the primary purpose of the static head in a pumping system?
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Which type of pump is suitable for pumping corrosive fluids due to its characteristic?
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What is the effect of increasing the velocity of a fluid on its kinetic energy?
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What is the formula to convert kinetic energy to potential energy in a pumping system?
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What is the primary advantage of using a diaphragm pump for pumping corrosive liquids?
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What is the primary reason why a pump is able to lift water from a supply tank located below its centre line?
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What is the main difference between a single-acting and a double-acting pump?
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At what altitude is the atmospheric pressure equivalent to approximately 9.1 m of water head?
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What is the purpose of the suction valves in a reciprocating pump?
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Which type of pump has a poorer suction lift than piston or plunger pumps?
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What is the characteristic of a rotary pump that allows it to deliver high pressure liquid without pulsations?
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What is the term for the pressure required to overcome the pressure of a vessel, such as a boiler or deaerator, when a pump discharges water into it?
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What is the advantage of using a gear pump over a reciprocating pump?
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What is the total height that the liquid is moved by the pump, including the pressure head, if pumping into a pressurized vessel?
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What is the purpose of the discharge valves in a reciprocating pump?
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Why is it important to avoid locating pumps too far above the water supply?
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What is the term for the distance between the centerline of the pump and the surface of the liquid level in an elevated supply tank?
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What is the main difference between a simplex and a multiplex pump?
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What is the primary consideration when selecting materials for a diaphragm?
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What is the primary reason why the maximum suction lift of a pump cannot be attained in reality?
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What is the term for the distance above the centre line of the pump and the liquid level of an elevated discharge tank?
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What is the function of the gears in a rotary gear pump?
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What is the primary reason why the atmospheric pressure varies with altitude?
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What is the main advantage of using a rotary pump over a reciprocating pump?
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What is the primary mechanism by which rotary lobe pumps transfer fluid?
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What is the main advantage of progressive cavity pumps in pumping slurries and abrasive liquids?
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What is the primary reason to start large centrifugal pumps with a closed discharge valve?
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What is the primary function of the stationary diffuser vanes in a diffuser centrifugal pump?
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In a centrifugal pump, what is the effect of the collapse of bubbles on the impeller surface?
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What is the characteristic of a regenerative pump that differentiates it from a centrifugal pump?
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Why is it necessary to install a pressure relief device in the discharge line of a positive displacement pump?
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What is the primary characteristic of a dynamic pump?
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Why is it important to avoid power surges in buildings with large electric lighting loads?
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What is the primary function of the rotor in a progressive cavity pump?
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What is the primary consequence of operating a regenerative pump with the discharge valve fully closed?
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What is the main difference between gear pumps and rotary lobe pumps?
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What is the effect of throttling the flow in a centrifugal pump on its power requirement?
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What is the primary advantage of peristaltic pumps in feedwater treatment and chemical dosing systems?
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What is the primary function of the sliding vanes in a sliding vane pump?
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What is the primary mechanism by which dynamic pumps add energy to the fluid?
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What is the primary reason for the conversion of velocity energy to pressure energy in a centrifugal pump?
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What is the function of the stationary diffuser vanes in a diffuser centrifugal pump?
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What is the direction of the liquid flow in an axial flow pump?
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What happens when the discharge head of a centrifugal pump increases?
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What is the effect of throttling the discharge valve on a centrifugal pump?
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What is the purpose of the volute casing in a radial flow centrifugal pump?
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What is the characteristic of a centrifugal pump that differentiates it from a positive displacement pump?
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What is the result of running a centrifugal pump with its suction valve shut for an extended period of time?
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What is the common application of mixed flow pumps?
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What is the effect of adjusting the discharge valve on a centrifugal pump?
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