Most marine biological sewage treatment plants consist of all the following statements except ______.

试卷相关题目

• 1The oil sludge is burnt in the ______onboard. I’ll show you the ashes.

  A.boiler

  B.main engine

  C.auxiliary engine

  D.incinerator

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• 2Which is the pollution prevention equipment、

  A.booster pump

  B.evaporator

  C.incinerator

  D.cooler

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• 3When started, a complete oily water separating unit is first filled______. The oily water mixture is then pumped through the inlet pipe into the coarse separating compartment.

  A.with dirty water

  B.with clean water

  C.by oily water

  D.by mixed water

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• 4Oily water separators are used to ensure that ships don't discharge oil when pumping out ______.

  A.ballast water

  B.boiler water

  C.bilge water

  D.sewage water

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• 5In order to achieve greater dehumidification(除湿) with an air conditioning system, you should ______. I. reduce the cooling coil temperature  II. increase the re-heater temperature

  A.I only

  B.II only

  C.Both I and II

  D.Neither I nor II

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• 6Great care is dedicated to the removal of _____ from the scavenge air.

  A.gravity

  B.viscosity

  C.density

  D.humidity

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• 7Dirty oil must be _____ before being used again.

  A.mixed with clean oil

  B.purified

  C.heated

  D.strained

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• 8When a vacuum boiling evaporator works, the hot jacket water will pass over the tube stack and ___ the sea water passing through the tubes.

  A.dispose

  B.dissolve

  C.heat

  D.dissipates

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• 9When securing a flash-type evaporator for an extended period of time, you should ______.

  A.fill the unit with saltwater

  B.fill the unit with descaling compound

  C.completely drain the unit

  D.tightly seal the unit to exclude air

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• 10Among the basic categories of equipment, which of the following are used to allow the hydraulic energy to be controlled、

  A.hydraulic pumps

  B.valves

  C.hydraulic cylinders

  D.hydraulic motors

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