Diesel engine fuel oil contamination often results in （）

相似题目

• A leaking diesel engine fuel injector will cause（）

  A . prolonged maintenance intervals B . improved atomization C . greater fuel economy D . incomplete combustio

  查看最佳答案

• A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a （）

  A、the use of a poor quality oil B、the deterioration of its properties C、the formation of deposits D、the reduction in heat transfer ability

  查看最佳答案

• The burning of fuel oil in a diesel engine having a high sodium content, will cause （）

  A . corrosion and grooving of exhaust valves B . corrosion and gumming of the fuel injection pump C . salt deposits in the exhaust manifold D . slag deposits in the fuel injection equipment

  查看最佳答案

• Dirt in the fuel oil system of a diesel engine can cause （）.

  A . clogged filters B . poor combustion C . overloading of the diesel D . shock of fuel line

  查看最佳答案

• What color exhaust will be exhibited when a slow speed two-stroke/cycle main propulsion diesel engine, designed to operate on light and heavy fuel oil, is operated on insufficiently preheated heavy fuel oil?（）

  A . White B . Black C . Blue D . Clear

  查看最佳答案

• Proper atomization of fuel in diesel engine combustion chambers will （）.

  A . affect the injection pressure B . improve combustion C . reduce compression pressure D . decrease power output

  查看最佳答案

• When running a large, low-speed, main propulsion diesel engine on heavy fuel, which of the following precautions should be observed when switching back over to diesel oil?（）

  A . The diesel oil must never be allowed to mix with the heavy fuel B . The temperature of the fuel from the pre–heater should be gradually reduced after switching over the three–way valve C . The heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valve D . The heating steam must be secured before the diesel oil passes through the three-way valve

  查看最佳答案

• Fuel oil contamination of an auxiliary diesel engine lube oil can result in（）

  A . an increased flash point B . higher lube oil pressures C . an increased viscosity D . lower lube oil pressure

  查看最佳答案

• Because of the close tolerances used in diesel engine fuel oil pumps, a worn plunger requires（）

  A . grinding the spare plunger to the barrel B . replacing the plunger and the barrel C . highly polishing both the plunger and barrel D . replacing plunger only

  查看最佳答案

• When fuel is injected late into a diesel engine cylinder,（）.

  A . the exhaust will be clear B . fuel consumption will be low C . all the fuel will be burned at top dead center D . fuel consumption will be high

  查看最佳答案

• When fuel enters the crankcase of a diesel engine, it （）

  A . dilutes the lube oil and reduces its viscosity B . forms sulfuric acid in the lube oil C . causes pitting and failure of the bearings D . causes sludge deposits on valve stem

  查看最佳答案

• 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

  查看最佳答案

• The sludge tank installed in the diesel engine room is used to collect（） Ⅰ.sludge from the fuel oil settling tanks ad centrifuge Ⅱ.water that has been collected in the settling tank

  A . Ⅰonly B . Ⅱ only C . bothⅠand Ⅱ D . neitherⅠor Ⅱ

  查看最佳答案

• Fuel is ignited in a diesel engine cylinder by （）

  A . a spark plug B . injectors C . the heat of compression D . increasing jacket water temperature

  查看最佳答案

• When comparing different fuels for different engines, the ignition quality of diesel fuel oils becomes a less critical consideration as （）

  A . the amount of lube oil additives increase B . piston speeds increase C . injection pressure decrease D . engine speeds decrease

  查看最佳答案

• The cetane number of a diesel fuel oil indicates its（）

  A . Viscosity B . acid content C . heating value D . ignition quality

  查看最佳答案

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

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

  查看最佳答案

• Clogged diesel engine fuel oil filters can cause（）

  A . loss of power B . misfiring C . low fuel oil pressure D . All of the above

  查看最佳答案

• The consistent burning of fuel oil with a high sulfur content in a diesel engine will result in （）

  A . clogged fuel injection pumps B . increased cylinder liner wear C . intake valve stem corrosion D . varnish deposit on pisto

  查看最佳答案

• Diesel oil may be used to cool （） of a diesel engine.

  A . cylinders B . exhaust valves C . pistons D . fuel valve

  查看最佳答案

• Fuel oil day tanks for diesel engines must be checked and cleaned and cleaned at regular intervals in order to remove（）

  A . sludge B . water C . micro-organism growth D . all of the above

  查看最佳答案

• When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.

  A . filter to remove the fuel oil B . use the settler to remove the fuel oil C . remove the fuel oil by centrifuging D . drain and then renew the lube oil supply

  查看最佳答案

• Which of the following conditions could be a cause of excessive fuel dilution of diesel engine lube oil?（）

  A . Leaking fuel injectors B . Lower than normal compression C . Delayed fuel injection D . All of the above are correct

  查看最佳答案

• Which of the following conditions indicates the dilution of diesel engine lube oil by fuel oil？ .

  A.Water discharging from the water outlet of the lube oil purifier B.Fuel oil discharging from the water outlet of the lube oil purifier C.Lube oil discharging from the water outlet of the lube oil purifier D.A change in the lube oil viscosity

  查看最佳答案