In a large, low-speed diesel engine the clearance between the piston crown and cylinder head is found to be excessiveIn order to correct for this, you should（）

相似题目

• 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

• 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

• During maneuvering operations for a direct reversing large, low-speed, main propulsion diesel engine, which of the following actions is used to stop the shaft from turning prior to reversing the engine rotation?（）

  A . Flywheel inertia B . Admission of starting air C . The way of the vessel D . securing of fuel to the cylinder

  查看最佳答案

• The opening of an exhaust valve on a modem, large, low-speed, main propulsion diesel engine may be actuated by （）.

  A . direct action of cam shaft B . compressed air pressure C . hydraulic “push rods” D . direct action of the main piston moving dow

  查看最佳答案

• A large, low-speed, main propulsion diesel engine uses sea water to directly cool the （）.

  A . cylinder heads B . exhaust valves C . scavenging air D . injector

  查看最佳答案

• In each cylinder cover is a large central opening for mounting （）

  A . the indicating cock B . the starting valve C . air inlet valve D . the exhaust valve

  查看最佳答案

• On a large low-speed main propulsion diesel engine, lower main bearing wear is usually measured by using a/an （）

  A . dial indicator B . outside caliper C . bridge gauge D . tram rod

  查看最佳答案

• When there is a fire in a large electric motor, normally the very FIRST step is to （）

  A . secure the electric supply B . ventilate area to remove smoke C . start the fire pump and lead out hose D . apply foam

  查看最佳答案

• The presence of stratus clouds and a dying wind will usually result in（）.

  A . heavy rain B . heavy snow C . thick fog D . clearing skie

  查看最佳答案

• Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of （）.

  A . fuel oil vapor at the sludge tank vent B . unburned fuel vapors in the scavenge air receiver C . lube oil vapors in the crank case D . lube oil vapors in the engine room

  查看最佳答案

• Which of the listed types of starting systems is often used on large, low-speed, direct reversing, main propulsion diesel engines?（）

  A . Electric B . Hydraulic C . Air D . All of the above

  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

• While underway, which of the following would be the FIRST step in reversing a direct reversing large, low-speed, main propulsion, diesel engine?（）

  A . Manually trip the over-speed device B . Interrupt the fuel flow to the engine C . Disengage the safety interlock D . Slide the camshaft to the neutral positio

  查看最佳答案

• If it becomes necessary to cutout an individual cylinder of a large, low-speed, main propulsion diesel engine, the fuel to that cylinder should be secured and its （）

  A . fuel pump should be removed and all connections blanked off B . cylinder oil feed rate should be increased slightly above that used at normal sea speed C . cylinder oil feed rate should be reduced D . cylinder oil feed rate should be increased to the maximum flow capable of the metering pum

  查看最佳答案

• 6.In a large enterprise, ________.

  查看最佳答案

• Diana died on Sunday, August 31，1997, following a () crash in Paris.

  查看最佳答案

• “In Africa, every five seconds, a child dies of starvation” , which type of opening does it belong to?

  查看最佳答案

• Before he died he had_________ a large quantity of alcohol.

  查看最佳答案

• This is a very popular book in the U.S., but it died have a history of being banned in Europe, and it was still＿in many countries.

  查看最佳答案

• Unfortunately, Gutzom Borglun died in 1941, just a few months______finishing his college education.

  A．lack in B．short of C．not enough for D．insufficient in

  查看最佳答案

• If you are in the street when an earthquake occurs, stay in A．large open space

  A．Right B．Wrong C．Not mentioned

  查看最佳答案

• A child wrapped in a blanket sits propped up in a large wicker chair, toying with a sprig.

  查看最佳答案

• Mary felt lonely after her husband died in a car accident.

  A．alone B．gloomy C．desolate D．separate

  查看最佳答案

• A ______ material is one in which the atoms are arranged in a periodic array over large atomic distance.

  A．Amorphous B．Ceramic C．Polymer D．Crystalline

  查看最佳答案