The gear and screw pumps are classified as ().
相似题目
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A screw pump belongs to () according to its working principle.
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When start a screw pump, the by pass valve should be ().
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In a () the center screw is driven and the outer screws idle.
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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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Pitting in the area close to the pitch line and on the same end of each gear tooth of a reduction gear unit would be caused by ()
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Which features of a centrifugal pump reduce the need for renewing worn impellers and pump casings?()
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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) rotary (3) centrifugal
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Large marine diesel engines of crosshead construction generally have two systems of lubrication: a total loss system feeding the () and a recirculation system lubricating the running gear and cooling the piston.
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You are landing a single-screw vessel,with a right-hand propeller,starboard side to the dock.When you have approached the berth and back the engine,you would expect the vessel to ().
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The amount of fluid delivered by a screw pump can be regulated by ().
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The control rod of a steering gear pump is attached at its outer end to ().
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()diesel engines generally have two systems of lubrication:()a total loss system feeding and a circulating system lubricating the running gear and cooling the pistons.
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The amount of fluid delivered by a gear pump can be regulated by ().
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A gear pump belongs to () according to its working principle.
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Some medium and high-speed diesel engines require reduction gear units to provide a useful propeller speedIn most reduction gears, the bull gear()
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The gear, screw, and vane pumps are all classified as ().
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There is a () system lubricating the running gear and cooling the piston and sometimes lubricating the cylinders.
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Which of the following pumps are self-priming, and can deal with liquid from a level below the pump() (1) ejector (2) screw (3) centrifugal
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To center a compass bowl in its binnacle,you should have the ship on an even keel,heading north or south,and adjust the screws until().
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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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The injector pump is operated by a cam which drives the () up and down.
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Your vessel is taking on fuel oil when a small leak develops in the hose and you have ordered the pumping stoppedBefore resuming pumping,you should().