In heavy marine engine the practice is to drive the engine on（）which has previously been stored in starting air reservoirs.

相似题目

• Lube oil pumps taking suction from the sump of most small marine engines are usually （）.

  A . of the diaphragm type B . of the centrifugal type C . of the positive displacement type D . independently driven by electric motor

  查看最佳答案

• In large marine diesel engines cylinder oils usually contain additives formulated to impart the （） to clean the rings and grooves.

  A . inefficiency B . oiliness C . detergency D . purity

  查看最佳答案

• For an ordinary modem marine four-stroke engine the inlet valves close （）.

  A . after TDC B . before TDC C . after BDC D . before BDC

  查看最佳答案

• One method of constructing large marine diesel engines and reducing the total engine frame weight is through （）.

  A . casting interlocking components B . welding plates to form sections for assembly C . forging integral components D . case hardening integral component

  查看最佳答案

• In heavy seas the helmsman should steer the survival craft（）.

  A . into the seas B . broadside to the seas C . in the same direction as the seas D . in a series of figure-eight

  查看最佳答案

• Large marine diesel engines of crosshead construction generally have two systems of lubrication: a total loss system feeding the （） and a recirculation system lubricating the running gear and cooling the piston.

  A . cylinder liners and piston rings B . main bearings C . crankpin bearings D . turboblower

  查看最佳答案

• My ship met（）heavy weather in the Indian Ocean.

  A . against B . with C . for D . o

  查看最佳答案

• Fresh water is used for the cooling of cylinder jackets and （） of the marine diesel engine.

  A . cylinder covers B . lubricating space C . crosshead D . exhaust manifold

  查看最佳答案

• Turbocharging of marine diesel engine is achieved by two distinct methods, （） termed the constant pressure and the pulse system.

  A . respectable B . respectful C . respective D . respectively

  查看最佳答案

• Main engines as well as auxiliary engines operating on heavy fuel should have continuous on the lubricating oil, either according to the bypass or batch principles（）

  A . filtering B . centrifuging C . depositing D . operating

  查看最佳答案

• One of the purposes for water cooling the exhaust manifold in marine diesel engine is to （）

  A . reduce lube oil temperature B . raise exhaust temperature reduce C . excessive heating of engine room D . reduce load on cooling water pum

  查看最佳答案

• Mariners should pay much attention in the overlapped area owing to（）.

  A . complicated circumstances B . changeable atmospheric pressure C . large density of traffic D . some strong signals from unwanted satellite

  查看最佳答案

• The following preparations are essential for any （） of marine diesel engine before it may be started.

  A . doing B . make C . turn D . operating

  查看最佳答案

• （） providing lubricating films, oil used in marine diesel engines have to remove heat from oil cooled piston.

  A . Except for B . Beside C . Except D . In addition to

  查看最佳答案

• Lubricating oil is supplied to the crank-pin bearings in a marine diesel engine by （）.

  A . internal crankshaft passages B . immersion in oil C . splash lubrication D . injection lubricatio

  查看最佳答案

• Each cylinder liner on the marine medium speed engines （）.

  A . is usually cooled by sea water B . can be replaced when worn out C . is in direct contact with the water in the bore of the cylinder D . can t expand when heated

  查看最佳答案

• The principal action in changing from transit to survival draft in the event heavy weather threatens is（）.

  A . ballasting B . deballasting C . disconnecting D . hanging off

  查看最佳答案

• The abbreviation RYC in a marine cable generally stands for（）.

  A . referring to your crew B . reference for your captain C . return to your cabin D . received your cable

  查看最佳答案

• Generally speaking，the fuel injected into a marine diesel engine combustion chamber is ignited by（）.

  A . spark plugs B . glow plugs C . heat of compression D . a magneto

  查看最佳答案

• The majority of medium speed and high speed marine diesel engines for main or auxiliary drive operate on the （） cycle.

  A . two-stroke B . four-stoke C . long-stroke D . short-stroke

  查看最佳答案

• Pistons of marine medium speed diesel engines may be made of （） in order to keep the weight down for balancing purpose at high speed.

  A . lead B . forged steel C . alloy steel D . aluminum alloy

  查看最佳答案

• Electronic Chart Display and Information system can assist the mariner in（）.

  A . voyage plan B . stability calculate C . calculate ETA D . monitor strength

  查看最佳答案

• In heavy marine engine the practice is to drive the engine on____ which has previously been stored in starting air reservoirs.

  A.electric motor B.hydraulic motor C.compressed air D.turning gear

  查看最佳答案

• The marine diesel engine is a type of diesel engine used on shipsThe _____ of its operation is not very difficult to understand.

  A.principle B.principal C.cause D.case

  查看最佳答案