A Kort nozzle is a(n) ______.A.hollow tube surrounding the propeller used to improve thrustB.nozzle attached to a firefighting hoseC.intake valve on a diesel engineD.piston cylinder on a diesel engine
A Kort nozzle is a(n) ______.
A.hollow tube surrounding the propeller used to improve thrust
B.nozzle attached to a firefighting hose
C.intake valve on a diesel engine
D.piston cylinder on a diesel engine
相关考题：
A thrust bearing is used with a propulsion diesel engine to ____.A.control axial movement of the crankshaftB.transmit engine thrust to the propeller shaftC.absorb vibrations in the propeller shaftingD.prevent propeller thrust from being transmitted to the hull
When the tail-shaft is drawn from a vessel in dry-dock, which of the following inspections is required to be carried out?A.The propeller hub taper and shaft keyway should be inspected for cracks or corrosionB.The stern bearing alignment with the stern frame should be checkedC.The interior of the stern tube should be inspected for leaksD.The shaft liner should be removed and inspected for cracks
To improve the quality of our products ,we asks for suggestions _______had used the products.A.whoeverB. whoC. whicheverD.which
A heavy，thick-walled tube，usually steel，used between the drill pipe and the bit in the drill stem to weight the bit in order to improve its performance is called a ______.A.heavy-walled drill pipeB.tool jointC.down hole toolD.drill collar
The moisture equilibrium chart can be used to determine the ______．A.Absolute moisture content of the air surrounding a hygroscopic cargo when moisture equilibrium existsB.Dew point temperature that the air surrounding a hygroscopic commodity will have when in moisture equilibrium with that commodityC.Enthalpy of the air surrounding a hydroscopic cargo which is in moisture equilibrium with the cargoD.Temperature at which moisture equilibrium will occur in a cargo hold containing a hygroscopic cargo
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Kort nozzles are installed around the propellers of some vessels to ______.A.increase the thrust of the propellerB.protect the propeller from striking sawyersC.protect the propeller from striking barges towed on the hipD.protect the propeller from touching bottom in low water
单选题A(n) （） is a mechanical attack on the metal surface which may be due to a disturbance in the flow of the water over the blade of the propeller.AerosionBcorrosionCpittingDdezincification
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单选题When the tail-shaft is drawn from a vessel in dry-dock, which of the following inspections is required to be carried out?（）AThe propeller hub taper and shaft keyway should be inspected for cracks or corrosionBThe stern bearing alignment with the stern frame should be checkedCThe interior of the stern tube should be inspected for leaksDThe shaft liner should be removed and inspected
单选题Sidewise force of the propeller tends to throw a vessel’s stern to the right or left，depending on rotation. This force is caused by（）.Aback current from the rudderBgreater pressure on the right or left side of the propeller，depending on rotationClower pressure on the right or left side of the propeller，depending on rotationDtorque from the velocity and angle at which the surrounding water impinges upon the propeller blades
单选题A thrust bearing is used with a propulsion diesel engine to （）.Acontrol axial movement of the crankshaftBtransmit engine thrust to the propeller shaftCabsorb vibrations in the propeller shaftingDprevent propeller thrust from being transmitted to the hul
单选题The type of gauge most commonly used to measure pressure is the （）.Abimetallic typeBdiaphragm typeCbourdon tube typeDresistance-temperature type
单选题The （） engine is used for alternators and some times for main propulsion with a gearbox to provide a propeller of between 90 to 120 rpm.Afour-strokeBtwo-strokeCslow speedDreversible
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单选题The moisture equilibrium chart can be used to determine the（）.AAbsolute moisture content of the air surrounding a hygroscopic cargo when moisture equilibrium existsBDew point temperature that the air surrounding a hygroscopic commodity will have when in moisture equilibrium with that commodityCEnthalpy of the air surrounding a hydroscopic cargo which is in moisture equilibrium with the cargoDTemperature at which moisture equilibrium will occur in a cargo hold containing a hygroscopic cargo
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单选题Kort nozzles are installed around the propellers of some vessels to（）.AIncrease the thrust of the propellerBProtect the propeller from striking sawyersCPrevent the propeller from striking barges towed on the shipDPrevent the propeller from touching bottom in low water
单选题The four-stroke engine is used for （） and sometimes for main propulsion with a gearbox to provide a propeller speed of between 90 to 120 rev/min.AalternatorBturbo-chargerCremote controllerDwindlass
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单选题A Kort nozzle is a(n)（）.Ahollow tube surrounding the propeller used to improve thrustBnozzle attached to a firefighting hoseCintake valve on a diesel engineDpiston cylinder on a diesel engine
单选题（）is used to moor the ship to the seabed to keep it sationary.AThe bulbous bowBThe anchorCThe bow thrusterDThe propeller