The cylinder oil is pumped into the cylinder （via non-return valves) when the piston rings

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• The lubricating system for the cylinder walls is different from the bearings in that the oil for former one is supplied in （） while that for latter one is （）.

  A . sufficient quantity； measured B . measured quantity；sufficient C . excessive quantity；sufficient D . the less quantity the better；the more the better

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• （）is harmful for fuel pumps, fuel valves, cylinder liner, exhaust valve seats, and the turbocharger blades as well.

  A . Bad combustion of the fuel B . Bad atomization of the fuel C . Liquid contaminants D . Solid contaminant

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• In the sentence “In some designs the cylinder oil is timed so that the oil injects only on the piston ring belt, the "piston ring belt" means （）.

  A . piston crown B . piston ring groove C . piston skirt D . piston ring area

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• In some diesel engine designs,（）the injection of cylinder oil is timed to impinge when the piston and only impinge on（）

  A . is coming upward；cylinder ring belt B . is going downward；piston ring belt C . is coming upward；piston ring belt D . is going downward；cylinder ring belt

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• The （）pump is usually used as the lubricating oil pump.

  A . turbine B . screw C . vaneejector D . centrifugal

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• When in operation, it is unavoidable that a small amount of oil （） through leakage, and in order to compensate for these leaks the system is connected to a feed pump.

  A . escapes B . overheats C . expands D . accelerate

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• The oil is drawn from a drain tank through （）, one of a pair of pumps, into one of fine filters.

  A . a strain tank B . a head tank C . a service tank D . a strainer

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• Heat for igniting the fuel oil in the cylinder of a diesel engine is generated by the （）

  A . electronic ignition system B . compression of air by the piston C . friction in the fuel injector D . fuel oil bearing system

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• In general, the oil mist defectors include a base plate with air blast pumpThe function of air blast pump is to （）crankcase.

  A . supply clean air to the measuring compartment of the units for more accuracy B . generaate the pressure required for the extraction of the oil mist from the C . generate the pressure required for the extraction of the oil mist from the crankcase D . supply clean air to the measuring track of the units for more accuracy

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• Fuel oil is pumped by means of （） from the bunker tanks.

  A . a transfer pump B . a bilge pump C . a service pump D . a vacuum pum

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• An axial piston, variable stroke pump is used in a vessels hydraulic steering gearUnder pressure, oil continually leaks out from between the valve plate/cylinder barrel and will（）.

  A . cause loss of hydraulic oil from the system B . result in extreme damage to the pump C . cause damage to the pump ff not continually drained from the pump casing D . result in the system high side pressure to substantially drop off

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• If a heavy sea strikes the rudder, the shock is transmitted through （） to the rams, this cause a sudden increase in oil pressure in one of the cylinders.

  A . the control rod B . the hunting gear C . the floating ring D . the tiller arm

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• Because the timing of injection is crucial, （） mounted on the camshaft, which is driven by the crankshaft are used to operate the fuel pumps, one of which is provided for each cylinder.

  A . gears B . rams C . barrels D . cam

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• Fuel oil discharged to the diesel engine cylinder is atomized at the （）

  A . turbocharger B . injection nozzle tip C . carburetor D . fuel oil pum

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• The cylinder oil is pumped into the cylinder (via non-return valves) when the piston rings pass the lubricating orifices during （）

  A . the upward stroke B . the downward stroke C . the power stroke D . the suction stroke

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• The cleaned heated oil, after passing through the centrifuges, is to be pumped to a （）.

  A . settling tank B . service tank C . ballast tank D . drain tank

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• Oil is supplied to the cylinder wall and （） by means of mechanical lubricators.

  A . the cylinder cover B . the piston rings C . the piston crown D . the piston skirt

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• The common method of applying oil to the cylinder walls is by means of small pump assembled in units, known as （）.

  A . mechanical lubricator B . lubrication function C . forced feed system D . bearing lubricatio

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• The lubricating oil is pumped from the drain tank, very often with （） in the suction line.

  A . a filter B . a strainer C . a magnetic filter D . a fine strainer

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• Your vessel is taking on fuel oil when a small leak develops in the hose and you have ordered the pumping stoppedBefore resuming pumping，you should（）.

  A . notify the terminal superintendent B . place a large drip pan under the leak and ping the scuppers C . repair the hose with a patch D . replace the hose

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• In a typical fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.

  A . a service tank B . a collecting tank C . a sump D . a settling tank

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• （） that everything in the engine crankcase is correct, start up the crankcase lubricating oil pump.

  A . To satisfy B . To be satisfied C . After satisfying D . After being satisfied

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• As for an oil-fired boiler if at a normal steaming condition and water goes out of sight in gauge glasses the action you should take is: （） (1) secure oil to fires (2) increase feed pump pressure

  A . （1） B . （1）and（2） C . （2） D . neither（1）nor（2）

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• The pumps press oil into the cross-head bearing gap when the load on the shell is at its lowestWhat is the meaning of “its” in the sentence above？

  A.the cross-head B.the pumps C.the shell D.the load

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