Question 4: Both lobe and gear pump types are recommended for applications in which abrasive fluids are pumped. A - True B - False _______________________________________________
Question 5: If a screw pump has three rotors and takes suction at each end of the pump, the driving power for the two idler rotors is provided by: A - An external timing chain that is driven by the central rotor B - An external gear drive that is turned by a gasoline engine C - Direct contact with the central power rotor D - Liquid pressure between the two idler rotors and the power rotor _______________________________________________
Question 6: A flexible tube pump is also called a:
A - Rotary plunger pump B - Sliding vane pump C - Shuttle block pump D - Peristaltic pump _______________________________________________
Question 7: A relief valve should be installed on the discharge side of a rotary pump to:
A - Prevent the pump driver from stalling B - Prevent damage to the pump due to excessive temperatures C - Protect the pump against excessive pressure D - Protect the pump against excessive wear _______________________________________________
Question 8: In an external gear pump, the:
A - Larger gear causes the smaller gear to turn faster causing increased pressure B - Liquid trapped between the gear teeth and casing is forced toward the discharge C - Leakage allows the fluid to progress from one gear to the next causing increased pressure D - Gears turn in the same direction and squeeze the liquid between them _______________________________________________
Question 9: Which pump consists of a housing containing two gears:
A - Sliding Vane Pump B - External Gear Pump C - Internal Gear Pump D - Three Lobe Pump _______________________________________________
Question 10: The type of rotary pump that has a series of hinged vanes is the:
A - Three lobe pump B - Sliding vane pump C - Rotary plunger pump D - Swinging vane pump
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Question 11: The type of rotary pump that uses external synchronizing gears is the: A - External gear pump B - Shuttle block pump C - Three lobe pump D - Sliding vane pump
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Question 12: As the rotor moves in a sliding vane pump, the vanes are ____________, creating a void at the suction port. As the void ___________, the liquid is discharged from the pump. A - retracted, diminishes B - forced out, increases C - forced out, diminishes D - retracted, diminishes ______________________________________________
Question 13: The internal gear pump has an externally-cut gear, which: A - Meshes with an externally-cut gear on one side of the casing B - Is positioned at the bottom and an idler or driven gear at the top C - Is positioned at the top and an idler or driven gear at the bottom D - Meshes with an internally-cut gear on one side of the casing _______________________________________________
Question 14: When the rotor revolves in a universal joint pump, four sets of flat surfaces open and close for a pumping action of: A - One discharge per revolution B - Four discharges per revolution C - Two discharges per revolution D - None of the above _______________________________________________
Question 15: When a rotary pump is in operation: A - The flow of liquid is in pulses and quite irregular B - The flow of liquid is smooth and continuous C - The discharge pressure tends to pulsate as the rotating parts intermesh D - Centrifugal force pushes the liquid to the outside of the rotating parts causing pressure accumulation _______________________________________________
Question 16: The type of rotary pump in which the gears are separated by a crescent shaped partition is the: A - External gear pump B - Shuttle block pump C - Internal gear pump D - Universal joint pump _______________________________________________
Question 17: An external gear pump can prime itself by discharging the air trapped in the casing if: A - The clearance at the ends of the gears, between the gears and the casing is small and the suction lift is at maximum B - The clearance at the ends of the gears, between the gears and the casing is wide and the suction lift is not too great C - The clearance at the ends of the gears, between the gears and the casing is small and the suction lift is not too great D - There is no clearance at the ends of the gears, between the gears and the casing and the discharge valve is closed _______________________________________________
Question 18: If your plant was handling flows that contained a high amount of solids, the best type of rotary pump to use in that process flow would be a/an: A - Three lobe pump B - Two lobe pump C - Internal gear pump D - External gear pump _______________________________________________
Question 19: The rotating lobes of a lobe pump are kept in synchronous motion because: A - The smaller lobe is used to drive the larger lobe for improved pump power B - External synchronizing gears drive the lobes C - The central lobe turns at a constant speed, keeping the outer lobes synchronized D - The largest lobe is always used to drive the smaller lobe _______________________________________________
Question 20: To prevent excessive pressure, rotary pumps should be started with: A - The discharge valve closed B - The discharge valve open C - The suction valve closed D - Both suction and discharge valves closed _______________________________________________
Question 21:
Which pump uses external synchronizing gears:
A - External Gear Pump B - Sliding Vane Pump C - Internal Gear Pump D - Three Lobe Pump _______________________________________________
Question 22: In a sliding vane pump, the rotor is: A - Positioned at the top and an idler or driven gear at the bottom B - Located between two idler rotors C - Centrally mounted in the pump cavity D - Eccentrically mounted in the pump cavity _______________________________________________
Question 23: In a three-rotor screw pump, the liquid is: A - Drawn into the middle of the rotor B - Pushed from the suction side of the pump to the discharge side C - Drawn into one end of the rotor D - Drawn into both ends of the rotor _______________________________________________
Question 24:
What pump has a cylindrical rotor turning in a concentric casing: