Valve gear knocks are more easily located while the engine （）.

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• If the compensating needle valve of a hydraulic governor is opened more than necessary the governor will （）

  A . have a larger than normal dead band B . produce excessive speed response to a load change C . respond slowly to any change in engine load D . stabilize engine speed at the new governor setting

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• Bearing knocks are likely to occur from （）.

  A . less clearance B . dirty lube oil C . overload D . bearing wear

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• （） are used to limit the pressure in any particular portion and mainly control the pressure after the valve.

  A、Relief valves B、Safety valves C、Check valves D、Reducing valves

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• Where are the test certificates，for wire rope used as cargo runners，and loose gear certificates usually maintained? （）

  A . With the Cargo Gear Register on the ship B . In the Official Log C . At the Coast Guard Marine Safety Office with the vessel's inspection records D . At the central records center of the agency testing the cargo gear

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• A more sophisticated pressure reducing valve incorporates a pilot valve which controls the fluid above the valve operating piston in response to downstream pressureThe bold and italic word “which” means （）.

  A . a pressure reducing valve B . a pilot valve C . an operating piston D . downstream pressure

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• Under rotary pumps are the gear, （）, cam-and-piston and screw types.

  A . reciprocating B . diffuser C . turbine D . vane

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• （）are used for anchor gear in marine work where the chains must withstand the corrosive effects of seawater.

  A . Chains B . Wires C . Ropes D . Line

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• Camshafts are usually driven by timing gears or （）.

  A . push rods B . chain drives C . rocker arms D . flywheel

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• Worm geared automatic mooring winches are （） as the multi-start feature reduces the advantage of worm gear iethe high gear radio.

  A . popular B . common C . in lead position D . uncommo

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• Gear pumps are （） type because they discharge a near constant amount of liquid regardless of pressure.

  A . positive displacement B . non-positive displacement C . mixed-flow D . axial-flow

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• The majority of automatic mooring winches are spur geared to improve the backward efficiency of the gear train for rendering（）

  A . spur geared B . screw geared C . worm geared D . belt drive

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• Gear-type flexible couplings are often used in diesel engine drive trains because they（）

  A . require no lubrication under normal operating conditions B . compensate for gross misalignment in the drive train C . are able to transmit high torque ,even where slight misalignment exists D . will rapidly disconnect the engine from the line shaft

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• Positive displacement, helical gear pumps are well suited for pumping oil because （）

  A . stuffing boxes eliminate the leakage problems usually associated with other gear pumps B . it is not necessary to closely maintain design clearances with this pump C . they are essentially self-priming and produce a high suction lift D . these pumps are designed with extreme tooth angled

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• When dropping anchor，you are stationed at the windlass brake．The most important piece（s）of gear is（are）（）.

  A . A hard hat B . A long sleeve shirt C . Gloves D . Goggle

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• The gear and screw pumps are classified as （）.

  A . variable stroke pumps B . multistage pumps C . positive displacement pumps D . triple-ported pum

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• The gear, screw, and vane pumps are all classified as （）.

  A . variable stroke pumps B . multistage pumps C . positive displacement pumps D . triple-ported pum

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• Exhaust valve openings in a diesel engine cylinder head are made as large as practical to （）

  A . increase back pressure during the exhaust process B . facilitate periodic replacement of the valves C . reduce the pumping loss associated with scavenging D . reduce tension on valve spring

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• The majority of cargo gear breakdowns are a result of（）.

  A . Guy failures B . Topping lift failures C . Bending of the boom from compression D . Gooseneck failure

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• A vessel fishing at night，with gear extending more than 150 meters horizontally outwards，will show in the direction of the gear（）.

  A . one white light B . two vertical white lights C . one yellow light D . two vertical yellow light

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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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• An interlock in the remote operating valve line stops the valve （） when the engine turning gear is engaged.

  A . to open B . opening C . open D . opened

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• Typically, Asians are more formal than westerners and older people are more formal than younger people.

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• Entertainment be more or less passive, while hobbies are more .

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• Today more and more people are suffering from psychosomatic illness.

  A．Y B．N C．NG

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