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The purging of air from an elector-hydraulic steering gear unit is necessary when()
A . changing over to hand pump operation
B . engaging the trick wheel
C . the system has been filled with new oil
D . the rudder angle indicator does not match the helm positio
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When steering on autopilot which of the following input conditions may NOT have an effect on the control of the steering gear().
A . Non-follow-up
B . Rudder adjustment
C . Weather adjustment
D . All the above may be activated
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In an electro-hydraulic steering gear system, when will the variable displacement pump be placed on stroke?()
A . When the helm is at any angle other than amidships
B . When the six-way valve is opened
C . When the ram relief valves lift
D . When the redder angle is different from the position of the helm
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With reference to operating a four-ram steering gear system under emergency conditions, which one of the following statements is incorrect?()
A . Only one pump should be used at any time
B . The ship speed should be reduced to 70% of the normal
C . Watch keeping of the steering gear should be increased
D . Limitations of the steering gear should be logged but the bridge need not be informed
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The function of the hydraulic telemotor transmitter used in an electro-hydraulic steering gear system is to ().
A . transmit the rudder angle to the bridge indicator
B . prevent the control linkage from striking the stops when hard over
C . automatically purge all entrained air from the system
D . send hydraulic signals to the receiving unit
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According to Regulations, a power driven auxiliary steering gear for a vessel capable of a 12 knot service speed, must be able to meet the rudder movement requirements at which of the minimum vessel speeds listed below?()
A . 6 knots
B . 7 knots
C . 9 knots
D . 12 knot
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According to Regulations, a power driven auxiliary steering gear for a vessel capable of a 20 knot service speed, must be capable of producing a rudder movement at which of the minimum speeds listed below?()
A . 7 knots
B . 10 knots
C . 15 knots
D . 20 knot
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The control rod of a steering gear pump is attached at its outer end to ().
A . the hunting gear
B . the rudder stock
C . the rudder controller
D . the feedback unit
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According to the way the steering gear is operated, the steering gear may be divided into: hand - steering, () and automatic steering.
A . hydraulic steering
B . follow-up steering
C . remote control steering
D . air controlled steering
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In case of your steering gear failed,()should be exhibited in shapes or lights.
A . not under command
B . restricted in her ability to manoeuvre
C . restrained by her draught
D . underway
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When the steering gear is in operation, you should ().
A . check hydraulic oil levels every hour
B . check the rams for overheating
C . check for excessive oil leakage from rams
D . drain water from telemotor cylinders each watch
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Rotation of the steering wheel on the navigation bridge initiates oil pressure being applied to the steering gear rams by ().
A . regulating the oil flow with the six-way valve
B . moving the automatic differential valve
C . moving the receiving tele-motor which regulates the two-way valve
D . varying the angle of a tilting box or eccentricity of a floating ring
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Proper operation of the main engine reduction gear set requires the operation to monitor ()
A . the sump oil level
B . oil flow sight glasses
C . bearing temperatures
D . all of the above
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When the helm demands a 20°right rudder movement from an electro-hydraulic steering gear, which of the listed actions will be the FIRST action to happen when this rudder position is attained?()
A . The six-way valve opens
B . The steering service pump motor is stopped
C . The follow-up gear takes the pump off stroke
D . The cylinder relief valves bypass oil to the suction side the pum
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When there is no movement of the rams on an electro-hydraulic steering gear, the tilting box of the running pump is ().
A . set for maximum torque
B . on the purge and vent stroke
C . in the neutral position
D . rotating backward
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The () in the steering gear system provides the force.
A . control equipment
B . power unit
C . transmission mechanisms
D . fittings and pipeline
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The follow-up gear on an electro-hydraulic steering gear()
A . relieves excessive fluid pressure
B . takes the pump off stroke when the desired rudder angle is attained
C . synchronizes wheel position with the rudder position
D . returns the rudder to midposition when the wheel is released
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The required rudder angle is transmitted hydraulically or electrically from the steering wheel at the bridge to the ()at the steering gear, just above the rudder.
A . transmitter
B . tele-motor
C . hydraulic ram
D . hydraulic cylinder
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When the desired rudder angle is attained by a typical double mm electro-hydraulic steering gear,the().
A . ram relief valves bypass oil to stop rudder movement
B . six-way valve shifts to the neutral flow position
C . steering pump electric motor is de - energized by the transfer switch
D . follow-up gear takes the hydraulic pump off stroke
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Most hydraulic steering gears are fitted with relief valves which()
A . function when the rudder is amidships
B . relieve excess whip pressure from the hydraulic oil system
C . protect the piping assembly from external rudder shock
D . relieve excessive telemotor pressure
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The test of a towing vessel’s steering gear control system includes each item EXCEPT().
A . a test from the alternative power supply,if installed
B . timing the movement of the rudder from hard over to hard over
C . verification that the rudder angle indicator shows the actual position of the rudder(s)
D . visual inspection of the steering linkage
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In an electro-hydraulic steering gear, any change in relative position between the synchronous receiver and the follow-up gear will result in()
A . the pump going to full stroke
B . closing of the six-way valve
C . driving the rams up against the stops
D . a corresponding slowing or increasing of the pumped flow rate
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Ship’s steering gear refers to()
A.cargo handling machines
B.deck winches and derricks
C.engine-room tools
D.course controlling system
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()Turning the steering wheel turns the steering shaft to which a worm gear is attached within the steering gear box.