On most diesel engines, the governor controls the output speed by （）.

相似题目

• Trunk-type diesel engine pistons are most effectively cooled by heat（）

  A . conducted through the engine block B . conducted to water cooled cylinder walls C . conducted through the piston crown D . loss to escaping exhaust gase

  查看最佳答案

• Excessively worn, or polished ends on a diesel engine valve spring, indicate（）

  A . burned exhaust valves B . excessive spring compression C . spring surge D . worn valve seat

  查看最佳答案

• With regards to a diesel engine crankcase explosion, the most violent is the（） (1) primary explosion (2) secondary explosion

  A . (1) only B . (2) only C . both (1) and (2) D . neither (1) or (2)

  查看最佳答案

• The most common diesel engine fuel system problems are caused by （）.

  A . incorrect adjustments B . dirty fuel C . broken fuel lines D . excessive vibratio

  查看最佳答案

• Leaking oil seals on a diesel engine turbocharger can cause（）

  A . the engine to run after the fuel has been secured B . the engine to over-speed C . a fire D . all of the above

  查看最佳答案

• The diesel engine valve subjected to most severe conditions of service is the （）.

  A . cylinder exhaust valve B . air starting valve C . air inlet valve D . cylinder relief valve

  查看最佳答案

• If a diesel engine runs roughly, which of the systems listed is most likely to be at fault?（）

  A . Fuel B . Lubricating C . Cooling D . Ignitio

  查看最佳答案

• On a diesel engine, fuel is delivered into the combustion space by （）.

  A . a cooling system B . a lubrication oil system C . an electric system D . an injection system

  查看最佳答案

• Lubricating oil should be changed on a heavy duty diesel engine when（）.

  A . it gets dark in color B . a sample rubbed between fingers feels thin C . it has been in use for a specified interval D . it no longer supports combustio

  查看最佳答案

• A diesel engine cranks properly during starting but immediately stallsWhich of the following systems is most likely at fault?（）

  A . Hydraulic starting B . Electric starting C . Ignition D . Fuel

  查看最佳答案

• The satisfactory operation of diesel engine exhaust valves usually depends on（）

  A . the proper back pressure B . the cooling water temperature C . correct timing and proper seating D . accurate metering and the exhaust temperature

  查看最佳答案

• When monitoring diesel engine performance, the most useful instrument to use is the （）

  A . dwell-tachometer B . exhaust gas pyrometer C . fuel flow rate mete D . exhaust gas analyzer

  查看最佳答案

• A change in the degree of fuel atomization in a diesel engine would most greatly affect （）.

  A . air turbulence B . fuel penetration C . fuel spray angle D . fuel injection rate

  查看最佳答案

• Clogged or partially obstructed exhaust ports on a diesel engine can cause（）

  A . over-speeding of the engine B . failure of the engine to shut down C . no effect of engine mounting bolts D . high exhaust temperature

  查看最佳答案

• On most modern diesel engines, the main and connecting rod bearings receive their lubricating oil by （）.

  A、banjo feed B、splash feed C、gravity feed D、pressure feed

  查看最佳答案

• The most serious effect of air trapped in a diesel engine jacket water cooling system is that it（）.

  A . causes colloid suspension in the cooling water B . reduces the capability of the lubrication system C . can form pockets which block the flow of coolant through the system D . leads to the scuffing of cylinder wall

  查看最佳答案

• Prior to starting most medium-speed propulsion diesel engines, which of the procedures listed should be observed?（）

  A . The expansion tank should be topped off B . The thermostatic water regulating valves should be manually opened C . The fuel filters should be changed D . The engine should be turned over slowly with the indicator cocks ope

  查看最佳答案

• Pyrometers commonly found on diesel engine exhaust systems, consist of（）

  A . pyrostats and a voltmeter B . a gas-filled bellows, a tube and a pressure gauge C . thermocouples and a voltmeter D . ammeters and thermocouple

  查看最佳答案

• What is the effect of heated intake air on a diesel engine? （）

  A . Increases efficiency B . Increases engine horsepower C . Increases engine life D . Reduces engine horsepower

  查看最佳答案

• The main purpose of starting the diesel engine on air briefly is（）

  A . to inspect if the cylinder has the water leakage B . to expel out the residual water/gas/oil from the cylinder C . to check if fuel supply is normal D . A and B

  查看最佳答案

• Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer to （）

  A . decrease the time required between cleanings B . removes all large and small foreign objects C . ensure a positive flow of oil at all times D . ensure that all lube oil has been treated twice

  查看最佳答案

• The most common instrument used to measure diesel engine exhaust pressure is the （）

  A . pyrometer B . bourdon gauge C . pneumercator D . manometer

  查看最佳答案

• "Scavenging" on a diesel engine means （）.

  A . injecting fuel oil into a cylinder B . removing exhaust gases from the cylinder C . forcing air into the cylinders under pressure after the exhaust valve has dosed D . a combination of all the above

  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