Cylinders of marine diesel engines are normally cooled by （）.

相似题目

• Fuels of high quality with their earlier ignitions will cause higher （）pressure in cylinders of a diesel engine.

  A . compression B . maximum C . rated D . oil

  查看最佳答案

• Combustion knock can occur in the cylinders of a diesel engine under any condition permitting （）.

  A . a shortened ignition delay period B . a lean fuel/air mixture C . excess fuel in the combustion chamber D . rapid vaporization of injected fuel droplet

  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

• Successful combustion inside the cylinders of a diesel engine is dependent upon （）.

  A . fine atomization B . high temperature C . good mixing of fuel and air D . all of the above

  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

• 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

• Diesel engines are started by supplying （） into the cylinders in the appropriate sequence for the required direction.

  A . fuel oil B . diesel oil C . compressed air D . jacket water

  查看最佳答案

• Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine by（）

  A . natural aspiration B . masked intake valves C . air cells D . scavenging air

  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

• The development of （） has kept pace with the increasing demands made by the steady rise in power produced by modem marine diesels.

  A . water B . fresh air C . oils D . gase

  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

• Large, two-stroke/cycle, main propulsion, diesel engine cylinders can be successfully pressure charged during normal operation, by using the （）.

  A . exhaust gas temperature system B . exhaust load system C . constant or pulse pressure system D . constant volume system

  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

• Modern marine diesel engines using mechanical fuel injection, operate on a combustion cycle which is（）

  A . a combination of constant volume and constant pressure B . a combination of constant temperature and constant pressure C . entirely constant pressure D . entirely constant volume

  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

• Mechanical lubricators for diesel engine cylinders are usually small reciprocating pumps which are （）.

  A . operated manually once an hour B . operated until the engine has started C . placed into operation only at maximum load D . adjustable to meet lubrication requirement

  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

• All marine low-speed diesels are of what design?（）

  A . Four-stroke B . Two-stroke C . Electronic ignition D . Forced exhaust

  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