单选题For a propeller direct driven by the engine,（）.Athe thrust pads are while metal faced on both sidesBthe thrust pads are while metal faced only on the forward sideCthe thrust pads are while metal faced only on the after sideDintermediate shaft usually supported by a plummer block
单选题
For a propeller direct driven by the engine,（）.
A
the thrust pads are while metal faced on both sides
B
the thrust pads are while metal faced only on the forward side
C
the thrust pads are while metal faced only on the after side
D
intermediate shaft usually supported by a plummer block
参考解析
解析：
暂无解析
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
A controllable pitch propeller on a diesel driven vessel eliminates the need forA.friction clutchesB.disconnect clutchesC.reversing gearsD.reduction gears
Compared to a constant pitch propeller, a controllable pitch propellerA.more efficiently uses available engine powerB.operates at a lower efficiency at a fixed speedC.produces the same torque at lower engine powerD.develops its rated power at a lower speed
单选题If keep the fuel injection of main engine unchanged when ship is fouled, that will causeⅠ.The speed of main engine to be reduced Ⅱ.Ship speed to be reduced Ⅲ.The resistance torque of propeller to be increased Ⅳ.Trim at stern to increase（）AⅠ + ⅡBⅠ ~ ⅢCⅠ ~ ⅣDⅠ + Ⅱ + Ⅳ
单选题While a ship with twin screw is making a turn, in order to prevent overload, the duty engineer should （）Areduce the fuel feeding of main engine of inner propellerBreduce the fuel feeding of main engine of outer propellerCfirstly reduce the fuel of main engine of inner propeller, then reduce the fuel feeding of engine of outer propellerDreduce fuel feeding of two engines at the same time
单选题Before starting a diesel engine that has an engine driven lube oil pump, the engineer should （）.Aopen the bypass lineBcut in the lube oil coolerCpressurize the lube oil systemDtop off the expansion tank
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 transmission system transmitting power from the engine to the propeller is composed of shafts, bearings, and（）ApropellerBflying wheelCmain engineDcrankshaft
单选题Why a gearbox is needed in a ship driven by a medium-speed diesel engine?（）ATo reduce the main engine speedBTo increase the main engine speedCTo govern the main engine speedDTo fix the propeller shaft
单选题A thrust block is designed to（）.Atransmit the thrust of the engine to the propellerBtransmit the thrust of the propeller to the vesselCabsorb the shock of wave pressure at the bowDbe placed between the engines and the foundation to absorb the vibration
单选题To successfully reduce an excessively high diesel engine exhaust gas temperature, you should （）.Areduce the engine driven fuel pump outlet pressureBretard the fuel injector timing to reduce powerCincrease the fuel rack settingDreduce the load on the engine
单选题Which of the following statements is correct concerning diesel engine cooling water systems?（）AEach engine must have its own engine driven cooling water pump capable of providing cooling for all ranges of operationBpropulsion engines with bores exceeding 200 mm are to be fitted with a means to display the cooling water temperature of each cylinderCAt least two independent sea suctions are to be provided for supplying water to the engine jackets or to the heat exchangersDSuitable strain are to be fitted between the circulating pumps and heat exchangers when sea water is used for direct cooling
单选题Some medium and high-speed diesel engines require reduction gear units to provide a useful propeller speedIn most reduction gears, the bull gear（）Amust churn the oil in the sumpBis connected to the propeller shaftCis driven at the highest RPMDcompensates for alignment variations between the engine and pinion gear
单选题Compared to a constant pitch propeller, a controllable pitch propeller（）.Amore efficiently uses available engine powerBoperates at a lower efficiency at a fixed speedCproduces the same torque at lower engine powerDdevelops its rated power at a lower speed
单选题Propeller running at （） are generally efficient.Ahigh speedsBmedium speedClow speedsDthe same speed with the engine
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
单选题In using reduction gears to obtain efficient propeller speeds, （）.Athey must be located at the after end of the engineBthey can only be used with one engine at a timeCthey eliminate the need for controllable pitch propellersDthey are connected to the engine with a flexible coupling
单选题The linear motion of a diesel engine piston is converted to the rotary motion required to drive gears, propeller shafts, and generators by the （）.AflywheelBcrankshaftCjournal bearingsDcamshaft
单选题When a ship is entering to narrow waterway and the fuel feeding of the main engine is keeping unchanged, which of the following is the wrong conclusion?（）Athe power of main engine will be reducedBexhaust temperature will be increasedCthe speed of the ship will be reducedDthe propulsion characteristic of propeller will keep unchanged
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About the jacket water, that of the auxiliary engines usually（） is circulated by pumps, and the main engine usually （）Aan engine-driven；as wellBan engine-driven；has an independent pumpCan independent；as wellDan independent；has an engine-driven pump
单选题Fuel oil transfer systems used onboard diesel propelled vessels are required to have （）.Atwo fuel oil transfer pumps provided where one is to be independent of the main engineBtwo fuel oil transfer pumps, with a combined capacity exceeding the maximum consumption of the main engineCengine driven transfer pumps and only used in constant speed applicationsDthe capacity of the engine driven pump exceed the consumption rate of the engine to which it is attached
单选题During the dock repair, when installing the tail shaft and propeller, who should be on the spot to supervise?（）Achief engineerBthe engineerCcaptainDany member of the engine department
单选题Always ensure that the turning gear is（）, even at the quay, the wake from other ships may turn the propeller and thus the engine.AdisengagedBengagedCassembledDdisassembled
单选题If your propeller is racing in rough weather，you should（）.Adecrease your engine speedBignore itCincrease your engine speedDstop your engine until the rough weather passes
单选题With（） the engine need not to be aligned with reduction gears or propeller shaft.ADiesel engine propulsionBDiesel electric propulsionCSteam engine propulsionDGas turbine propulsion