Critical speeds occurring within the operating speed range of a main propulsion diesel engine may be changed, or have their damaging effects reduced by a/an （）

A、engine support vibration isolator

B、detuner or viscous fluid damper

C、lightened crankshaft flywheel

D、spherically seated crankshaft bearing

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更多“Critical speeds occurring within the operating speed range of a main propulsion diesel engine may be changed, or have their damaging effects reduced by a/an （）”相关的问题

第1题

[单选题] Which of the terms listed below represents the operational speed at which excessive engine vibration is created?（）

A、Non-harmonic speed B、Critical speed C、Maximum speed D、Design maximum speed

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第2题

[单选题] To prevent the build up of high stresses engine must not be run continuously （）.

A、faster than dead slow speed B、slower than dead slow speed C、with the output of MCR D、at critical speeds

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第3题

[单选题] Critical speed in diesel engines occurs when engine torque pulsations become （）

A、opposed to the crankshaft rocking couple B、resonant with the crankshaft natural frequency C、critical fore and aft crankshaft vibrations D、horizontal whipping motions of the crankshaft

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第4题

[单选题] 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

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第5题

[单选题] Which of the following is MOST critical when installing a new processor in an existing system?（）

A、Thermal paste B、Fans C、Drive speeds D、Cable management

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第6题

[] When the vessel on the full speed ahead, if full astern immediately （） the main engine start astern and fuel injection.

A、A.after the thrust power is zero B、B.after the torsion is zero C、C.surpass the critical point on the water turbo phase D、D.after the speed is zero

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第7题

[单选题] In ships where the engine room is designed as UMS, temperature sensors are fitted at critical points within the scavenge spacesActivation would cause automatic （）of the engine.

A、stop B、start C、speed up D、slow down

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第8题

[单选题] The possibility of damage from operating a diesel engine at critical speeds is reduced by the use of（）.

A、an isochronous governor B、elastic engine mounts C、a vibration damper D、a cast iron bed plate with good flexible qualities

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第9题

[多选题] Which three methods would help prevent critical network-traffic packet loss on high speed interfaces？（）

A、policy routing B、increase link capacity C、WRED D、CBWFQ E、LFI F、WFQ