Main shaft
Main shaft
相关考题：
During the dock repair,______should be measured firstly before tail shaft drawn out.A.the sinking of tail shaftB.the clearance of stern bearingC.the total flexure of shaftD.main engine crankshaft deflection
Which of the following is operated from the main engine room console on an automated vessel?A.Fire pump and lube oil pumpB.Lube oil pump and distilling plantC.Distilling plant and shaft alley doorD.Shaft alley door and fixed CO2 release
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
Which of the following statements represents an advantage of an electromagnetic clutch?A.Large misalignments can be tolerated between the shaft and engine couplingB.Slip is held to a minimum when reversing shaft rotationC.Engine torsional vibrations to the driven shaft are eliminatedD.It aids in maintaining power factor
What prevents water running along the shaft of a leaking centrifugal pump from entering the shaft bearing ________．A.Shaft sealB.Water flingerC.Drain holeD.Lantern ring
A wobbling tail shaft is an indication of ______.A.shallow waterB.an engine that is misfiringC.a tight tail shaft glandD.worn stern bearing or misalignment
单选题0n a single-screw vessel the stern frame（）.Afurnishes support to the rudder, propeller shaft, and transom frameBprovides foundations for after mooring winchesCprovides foundation for the main propulaion enginesDtransfers the driving force of the propller to the hull
单选题Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or （）.Ainside micrometerBfeeler gaugeCadjustable trammelDsighting device
单选题Which of the following statements represents an advantage of an electromagnetic clutch?（）ALarge misalignments can be tolerated between the shaft and engine couplingBSlip is held to a minimum when reversing shaft rotationCEngine torsion vibrations to the driven shaft are eliminatedDIt aids in maintaining power factor
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Which of the following is operated from the main engine room console on an automated vessel?（）AFire pump and lube oil pumpBLube oil pump and distilling plantCDistilling plant and shaft alley doorDShaft alley door and fixed CO2 release
单选题The main function of tie rods in the construction of large, low speed diesel engines is to（）.Astiffen the bedplate in way of the main bearings to increase the engines longitudinal strengthBaccept most of the tensile loading that results from the firing forces developed during operationCmount the engine frame securely to the hull to prevent shaft coupling misalignmentDconnect the crosshead solidly to the piston rod
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Signs of racking stresses generally appear at the（）.Abow and stern shell frames and platingBjunction of the frames with the beams and floorsCgarboard strake，at each side of the keelDthrust bearing of the main shaft
单选题One of the main functions of wearing rings, as used in a centrifugal pump, is to （）.Amaintain radial alignment between the pump impeller and casingBabsorb all impeller shaft end thrustCprevent water leakage to the atmosphereDprevent wear of the pump casing and/or impeller
单选题The load limitation of governor should be reduced when ship navigating at sea, the main reason is to（）Aprevent the diesel engine surgingBprevent governor from being damaged because of swingCreduce the probability of the crank shaft being torsional vibrated and resonatedDprevent the main engine being overload or overspeed
单选题During maneuvering operations for a direct reversing large, low-speed, main propulsion diesel engine, which of the following actions is used to stop the shaft from turning prior to reversing the engine rotation?（）AFlywheel inertiaBAdmission of starting airCThe way of the vesselDsecuring of fuel to the cylinders
单选题Leakage of hydraulic fluid from around the shaft of a hydraulic motor may be caused by（）Apermanent loss of pump suctionBworn shaft sealsChigh level in the oil sumpDlow motor RPM
单选题Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or （）Ainside micrometerBfeeler gauge and straight edgeCadjustable trammelDsighting device
单选题“Any leaks in piping, propeller shaft, machinery, tanks, will have to be repaired, or at least patched up temporarily until the next stop” This sentence means that （）.AAny leaks in piping, propeller shaft, machinery, tanks, will have to be repaired on the spotBAny leaks in piping, propeller shaft, machinery, tanks, will have to be repaired on the next port of callCAny leaks in piping, propeller shaft, machinery, tanks, will have to be repaired until the next stopDAny leaks in piping, propeller shaft, machinery, tanks, will have to be at least patched up
单选题Some vessels are equipped with a water lubricated stern robeWhen at sea, operating under normal conditions, the water service valve from the ships saltwater system to the bearing should be （）.Aclosed, and no leakage permitted across the shaft packingBclosed, and only slight leakage permitted across the shaft packingCopen, and no leakage permitted across the shaft packingDopen, and only slight leakage permitted across the shaft packing
单选题When the vessel shafting are installed, the slightly inclined of the shaft line should be rectified by（）Aadjusting the position of the intermediate bearingBchanging the position of the main engine installationCadjusting the center line of the propellerDchanging the position of the thrust block
单选题A wobbling tail shaft is an indication of（）.Ashallow waterBan engine that is misfiringCa tight tail shaft glandDworn stern bearing or misalignment
单选题The （） of the main shaft should be measured with a （）.Aclearance；calipersBsinking；bridge gaugeCdiameter；bridge gaugeDclearance；lead wire