When steering by autopilot,how often should the steering be checked?（）

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• （）provides a paper trace of course steered by the vessel against time.

  A . The echo sounder B . The radar C . The course recorder D . The direction finder

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• Air trapped in the hydraulic fluid of a steering system may be indicated by（）

  A . the steering pumps overspeeding B . a jammed open relief vale C . a constantly occurring improper rudder response D . excessive ram pressure

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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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• Generally，you can best keep a vessel under steering control when the vessel has（）.

  A . headway B . sternway C . no way on，with engines stopped D . no way on，with engines full ahead

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• The hand steering is a method by which the motion of the rudder is controlled with （）.

  A . a motor-driven steering wheel B . a pneumatic steering wheel C . a hand-driven steering wheel D . an electric steering wheel

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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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• Air trapped in the hydraulic fluid of a steering system would be indicated by（）

  A . an improper rudder response B . hammering noises in the equipment or transmission lines C . popping or sputtering noises D . all the above

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• The word “critical” in the sentence “This is a critical period as any loss of propulsion, or steering, can lead to collision, grounding, or other damage to the ship” can be best replaced by （）.

  A . A.dangerous B . B.best C . C.bad D . D.important

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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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• Course directed by the 0SC or CSS to be steered at the beginning of a search is（）.

  A . original course B . initial course C . final course D . designated course

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• If one hydraulic pump of an electro-hydraulic steering unit falls, the vessels steering can be initially and best maintained by using the （）.

  A . trick wheel B . accumulator C . standby pump D . telemotor

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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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• In an electro-hydraulic steering system, under movement is maintained in close synchronization with the steering wheel position by means of the （）.

  A . trick-wheel B . follow-up control C . six-way valve D . Rapson slide

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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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• Course directed by the OSC or CSS to be steered at the beginning of a search is（）.

  A . Original course B . Initial course C . Final course D . Designated course

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• When steering a tow downstream around the shape of a sand bar，and staying on the proper side of the buoys，an operator should be cautious of（）.

  A . eddies under the bar B . swift current under the bar causing loss of control C . cross-currents pushing the tow away from the bar D . cross-currents pushing the tow into the bar

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• In an elector-hydraulic steering system, rudder shock is limited by（）

  A . a differential gear B . return springs C . a hydraulic accumulator D . relief valve

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• When air becomes trapped in the hydraulic fluid of a steering system, the （）.

  A . rudder will respond sluggishly B . hydraulic rams will over-speed C . sight glass will show bubbles D . ram relief valves will lift

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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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• In an electro-hydraulic steering system, rudder movement is maitained in close synchronization with the steering wheel position by means of the ______.

  A.trick wheel B.follow-up control C.six-way valve D.Rapson slide

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• 0271The word “critical” in the sentence “This is a critical period as any loss of propulsion, or steering, can lead to collision, grounding, or other damage to the ship.” can be best replaced by _____.

  A.dangerous B.best C.bad D.important

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