单选题When the ship, its main propulsion device equipped with clutch, arrived at the port and finished with the engine, the correct operation should be（）Adisengaging the clutch firstly, then stopping the main engineBstopping the main engine firstly, then disengaging the clutchCstopping the cooling water pump firstly, then stopping the main engineDstopping the main engine and disengaging the clutch at the same time
单选题
When the ship, its main propulsion device equipped with clutch, arrived at the port and finished with the engine, the correct operation should be（）
A
disengaging the clutch firstly, then stopping the main engine
B
stopping the main engine firstly, then disengaging the clutch
C
stopping the cooling water pump firstly, then stopping the main engine
D
stopping the main engine and disengaging the clutch at the same time
参考解析
解析：
暂无解析
相关考题：
On a ship, the locker or space containing the self-contained breathing apparatus must _____.A.be located in close proximity to the main control stationB.be equipped with battery powered emergency lightingC.be marked SELF-CONTAINED BREATHING APPARATUSD.All of the above
When a ship were found its equipment does not correspond substantially with the particulars of the Certificate by a nominated surveyor and corrective actions unable to be taken, thenA.the Certificate would be withdrawnB.the ship owner would be finedC.the shipping company must be notified immediatelyD.the ship must proceed to the nearest appropriate repair yard for a repair without delay
When the ship, its main propulsion device equipped with clutch, arrived at the port and finished with the engine, the correct operation should be______.A.disengaging the clutch firstly, then stopping the main engineB.stopping the main engine firstly, then disengaging the clutchC.stopping the cooling water pump firstly, then stopping the main engineD.stopping the main engine and disengaging the clutch at the same time
材料：Spark erosion is caused by a voltage discharge between the main bearing and journal surface. The cause of the potential is the development of a galvanic element between the ship’s hull, sea water, and the propeller shaft/crankshaft.The oil film acts as a dielectric. The puncture voltage in the bearing depends on the thickness of the oil film. With increasing engine ratings, the specific load in the main bearing is increased. his will reduce the oil film thickness, and enable the discharge to take place at a lower voltage level.Since the hydrodynamic oil film thickness varies through a rotation cycle, the discharge will take place at roughly the same instant during each rotation cycle, i.e. when the film thickness is at its minimum. The roughening will accordingly be concentrated in certain areas on the journal surface. In the early stages, the roughened areas can resemble pitting erosion. but later, as the roughness increases, the small craters will scrape off and pick up white metal-hence the silvery white appearance.Therefore, to ensure protection against spark erosion, the potential level must be kept at maximum 80 mV, which is feasible today with a high efficiency earthing device. If an earthing device is installed, its effectiveness must be checked regularly. Spark erosion is only observed in main bearings and main bearing journals.问题：According to the paragraph one, a voltage between the main bearing and journal surface is produced by______.A.propeller rotationB.leakage from M/E electric control unitC.a galvanic elementD.friction between the main bearing and journal surface______engine ratings increase, the hydrodynamic oil film between the main bearing and journal surface is______.A.The lower/thinnerB.The higher/the thickerC.The lower/thickerD.The higher/thinnerWhen will the spark erosion take place on the journal surface during each rotation cycle?A.when the film thickness is at its minimumB.when the film thickness is at its maximumC.when the engine is on its compression strokeD.when the engine is on its exhaust strokeDuring the engine room watch keeping, which equipment must be noted to ensure protection against spark erosion?A.the antifouling plantB.the earthing deviceC.the main engine electric heating coilsD.the shaft generator请帮忙给出每个问题的正确答案和分析，谢谢！
Every ship should hoist ______ when approaching and entering ports.A.its flashing lightB.the ship’s nameC.its identificationD.its signal letters
单选题If your vessel is equipped with a radiotelephone，what must also be aboard?（）ACertificate of InspectionBList of ship stationsCCopy of ship to shore channelsDRadio station license
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Among the main propulsion units on board the ship with the same capacity, the lightest one is（）.Asteam engineBsteam turbineCgas turbineDdiesel engine
单选题我船配有自动舱盖。（）AOur ship is equipped with automatic hatch covers.BOur ship is equipped with folding-type hatch covers.COur ship is equipped with side-rolling hatch covers.DOur ship is equipped with rolling-type hatch covers.
单选题When ship is fouled, increasing the fuel injection for keeping the normal speed will cause the main engine （）Ato work as overload characteristicBoverspeedCover mechanical load onlyDover thermal load only
单选题When the ship security alert system is activated, it shall not（）Ainitiate a ship-to-shore security alertBtransmit a ship-to-shore security alertCinitiate an alert identifying the ship, its locationDraise a security alarm on-board the ship indicating that the ship is under threat
单选题Suppose the rated capacity of the main engine of a ship is 10,000 KW at 100 rated rpm, then when at 80 rpm its capacity should be （）.A800 KWB5120 KWC6400 KWD4180 KW
单选题Our ship（）with many modern navigational instruments.AequippedBis equippedCequipsDhas equipped
单选题Changes in direction or speed of the main propulsion units shall be recorded, （）an Administration has determined that the size or characteristics of a particular ship make such recording impracticable.Ain addition toBin addition thatCexcept forDexcept where
单选题What color exhaust will be exhibited when a slow speed two-stroke/cycle main propulsion diesel engine, designed to operate on light and heavy fuel oil, is operated on insufficiently preheated heavy fuel oil?（）AWhiteBBlackCBlueDClear
单选题When a ship is fully loaded, it needs to prevent the main engine to be（）.While a ship is fully empty, it needs to prevent the main engine to be（）.Aoverspeed；overloadBoverload；overspeedCover mechanical load；over thermal loadDover torque；overspeed
单选题When attempting to start a main propulsion diesel engine, the engine, the engine turns at the proper speed but will not startYou should check the（）Astarting air pressureBscavenge air pressureCover-speed tripDbanjo oiler line
单选题When the general alarm is sounded continuously, the engine room personnel should （）.Aproceed to their man overboard stationsBstart the fire pumpCput on lifejackets and go to their abandon ship stationsDsecure the propulsion diesel engines and evacuate the engine room
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The ship will be responsible for the cargo loaded or unloaded（）.Aonly when the cargo is within its railBduring the time when loading or ynloading is going onCafter the cargo is checked by tallymenDas soon as loading or discharging begins
单选题In a large, slow-speed, main propulsion diesel engine, which of the parts listed is under tension when the engine is running?（）ABed plateBColumnCEntablatureDTie rod
单选题When a ship in loaded condition floats at arbitrary water line, its displacement is to the relevant mass of water displaced by the ship（）AequalBlargerCsmallerDequivalent
单选题Chain suspension ladders on a ship must be replaced by fixed ladders if the required chain suspension ladder（）.Ahas been sent in for repairBcannot be supported against a vertical flat surfaceCdoes not extend to the water when the ship lists 15 degreesDis not equipped with vertical guard rails on either side
单选题All of the followings are the detainable deficiencies under the SOLAS Convention expert（）.AFailure of proper operation of propulsion and other essential machinery, as well as electrical installationBFailure of the proper operation of the main and auxiliary steering gearCFailure of engineering watch arrangements to confirm to the requirements specified for the ship by AdministrationDFailure of the proper operation of emergency generator, lighting, batteries and switches
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 possible cause for an individual piston to knock when at TDC on a slow-speed, two-stroke/cycle main propulsion diesel engine could be due to （）Aearly fuel injectionBexcessive bearing play within the running gearCoverloading of the cylinderDall of the above