Gear pumps are () type because they discharge a near constant amount of liquid regardless of pressure.
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相似题目
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Which of the following types of hydraulic pumps would be used in a steering system?()
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Cooling water pumps driven by direct reversing diesel engines are usually of the straight impeller vane type pump with a concentric housing to()
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Under rotary pumps are the gear, (), cam-and-piston and screw types.
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One of the main differences between the various types of screw pumps is in the ().
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Which of the following pumps will build up a bursting pressure or stall their motors if the discharge valves are closed?() (1) gear (2) centrifugal (3) screw
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In an electro-hydraulic steering gear system, when will the variable displacement pump be placed on stroke?()
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While overhauling a jerk-type fuel pump it is necessary to replace the pump plungerWhich of the parts listed below must also be replaced?()
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The control rod of a steering gear pump is attached at its outer end to ().
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Under centrifugal pumps are the volute, diffuser, mixed-flow, axial flow and () or regenerative types.
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Movement of the pump control rack in a fuel injection system using individual plunger-type pumps ()
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The amount of fluid delivered by a gear pump can be regulated by ().
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On a lifeboat equipped with Rottmer-type releasing gear,turning the releasing lever releases().
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Gear-type flexible couplings are often used in diesel engine drive trains because they()
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Positive displacement, helical gear pumps are well suited for pumping oil because ()
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A gear pump belongs to () according to its working principle.
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The gear and screw pumps are classified as ().
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Valve gear knocks are more easily located while the engine ().
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On what type of pump would you find an impeller?()
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The gear, screw, and vane pumps are all classified as ().
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When there is no movement of the rams on an electro-hydraulic steering gear, the tilting box of the running pump is ().
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A deepwell pump is a type of().
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The majority of cargo gear breakdowns are a result of().
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Which of the following pumps are self-priming, and can deal with liquid from a level below the pump? () (1) reciprocating (2) vane (3) gear
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Which of the devices listed is common to all types of pumps?()