单选题In the cargo winch, spur reduction gearing transfers the motor drive to ().Athe toping lightBthe board brakeCthe fail-safeDthe barrel shaft
单选题
In the cargo winch, spur reduction gearing transfers the motor drive to ().
A
the toping light
B
the board brake
C
the fail-safe
D
the barrel shaft
参考解析
解析:
暂无解析
相关考题:
4 (a) A company may choose to finance its activities mainly by equity capital, with low borrowings (low gearing) or byrelying on high borrowings with relatively low equity capital (high gearing).Required:Explain why a highly geared company is generally more risky from an investor’s point of view than a companywith low gearing. (3 marks)
If an attempt is made to hoist a load that exceeds the capacity of an electric winch,an overload safety device causes a circuit breaker to cut off the current to the winch motor ______.A.when the line pull reaches the rated winch capacityB.after the line pull exceeds the rated winch capacityC.after a short build-up of torqueD.immediately
When a cargo boom or crane is rated at varying capacities,there will be a table at the controls which relates safe working load to ______.A.winch speedB.boom strengthC.load radiusD.cable strength
When using slings,cargo handlers should take all the following precautions except ______.A.Ensure that slings are securely fastened around the loadB.Avoid careless winch operations,especially when handling fragile cargoC.Exercise care when using hooks,crowbars,and similar toolsD.Keep the loads as close to the rail or deck as possible
A whipping is ______.A.a messengerB.a stopper for nylon lineC.a U-bolt for securing a cargo whip to the winch drumD.turns of twine around a rope end
If an electric cargo winch is being used to lift a draft of cargo and the engine room loses all power,which will occur ________.A.A pawl,forced by a spring mechanism,will engage the teeth of the bull gear and hold the loadB.An electromagnetic brake will hold the load where it is suspendedC.The load will fall rapidly to the deck unless the foot brake is engagedD.The load will slowly lower to the deck under control of the drag of the winch motor
After seeing that the gears are free to engage ,put the windlass() .A、into gearB、for gearC、onD、gearing
头缆上车!()A、Put head line on winch!B、Put stern line on winch!C、Hold on head line!D、Heave in head line.
单选题A mechanical davit is designed to automatically().Aposition the boat at the embarkation stationBlift the boat off the inboard chocksCenergize the winch for the fallsDset the brake on the winch
单选题杂货船可以用自己的吊杆装卸货物。()AGeneral cargo ships may load and discharge by her own winch.BBulk carriers may handle cargo by her own derricks.CGeneral cargo ships may load and discharge by her own derricks.DGeneral cargo ships may load and discharge by cranes.
单选题Mechanical gearing of deck machinery such as the windlass or boat hoists should().Abe open to view so,if a foreign object gets in the gearing,the operator can immediately stop the machineryBhave a guard over the gearingCbe painted a contrasting color from the base color in order to call attention to the gearingDnot be operated if there is any crew within 10 feet of the machinery
单选题The riding pawl is().Aa safety interlock in a cargo winch that prevents the runner from overspeedingBa stopper that prevents the anchor cable from running free if the cable jumps the wildcatCthe device that locks the deck lashings of the Peck and Hale systemDthe lug that rides on the eccentric rib and engages the locking ring on the windlass
单选题四则运算指令包括加法指令是(),减法指令是(),乘法指令是(),除法指令是()。AADD/SUB/MOT/DIVBSUB/ADD/MOT/DIVCMVL/ADD/SUB/DIVDDIV/ADD/SUB/MVL
单选题The limit switches on a ships survival-craft winch system().Astop the winch just before the craft reaches the final stowage positionBlimit the amount of cable on the drumClimit the ascent rateDstop the winch in case the craft weighs too much
单选题A “stopper” is().Aa short length of line used for temporarily holding another lineBa snatch block for handling a topping liftCan engine order telegraphDthe brake on a cargo winch
单选题A whipping is().Aa messengerBa stopper for nylon lineCa U-bolt for securing a cargo whip to the winch drumDturns of twine around a rope end
单选题The clutch band of a constant tensioning mooring winch must be set up tight enough to drive the winch drum and should slip only when ().Aexcessive loads are placed on the winchBminimum pull is being exerted by the winchCautomatic operation of the winch is desiredDwire is being retrieved at the maximum rate
单选题() allows the engine to be placed wherever is most suitable, as they no longer have to be aligned with reduction gearing and shafting as is the case with conventional installations.ADiesel engine propulsionBDiesel electric propulsionCSteam engine propulsionDGas turbine propulsion
单选题If an attempt is made to hoist a load that exceeds the capacity of an electric winch,an overload safety device causes a circuit breaker to cut off the current to the winch motor().Awhen the line pull reaches the rated winch capacityBafter the line pull exceeds the rated winch capacityCafter a short build-up of torqueDimmediately
单选题Electric cargo winches have an overload safety device which normally cuts the current to the winch motor().Aafter torque causes line pull to exceed the rated capacity of the winchBbefore the line pull reaches the rated capacity of the winchCwhen the line pull reaches the breaking strength of the fallDbefore the safe working load of the fall is reached
单选题The oil in a cargo winch gear box should be sampled periodically to ().Aprevent the gear box from leakingBprevent the oil from becoming inflammableCmake sure it has not become contaminatedDmake sure the motor bearings are lubricated
单选题What happens to the pulling power of a winch when retrieving wire rope?()AIt increasesBIt decreasesCIt remains the sameDIt fluctuates,depending on the gearing system
单选题When using slings,cargo handlers should take all the following precautions except().AEnsure that slings are securely fastened around the loadBAvoid careless winch operations,especially when handling fragile cargoCExercise care when using hooks,crowbars,and similar toolsDKeep the loads as close to the rail or deck as possible