其他其他其他2007年第2期海船船员适任证书全国统考试题(总第43期)

试卷预览

• 21Which of the following conditions must exist for heat to flow from one object to another、

  A.The two objects must be in physical contact.

  B.The two objects must be the same size.

  C.There must be an existing temperature differential.

  D.There must be an existing weight differential.

  开始考试练习点击查看答案
• 22The dew point of air is reached when the wet bulb temperature is ______.

  A.twice the dry bulb temperature

  B.10℃ above the dry bulb temperature

  C.5℃ above the dry bulb temperature

  D.equal to the dry bulb temperature

  开始考试练习点击查看答案
• 23If air at 95 ℃ dry bulb temperature and 50% relative humidity is conditioned to 75 ℃ dry bulb temperature and 50% relative humidity, it is an example of ______.

  A.cooling only

  B.cooling and humidifying

  C.cooling and dehumidifying

  D.adiabatic(绝热的) cooling

  开始考试练习点击查看答案
• 24In 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

  开始考试练习点击查看答案
• 25Oily 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

  开始考试练习点击查看答案
• 26When 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

  开始考试练习点击查看答案
• 27Which is the pollution prevention equipment、

  A.booster pump

  B.evaporator

  C.incinerator

  D.cooler

  开始考试练习点击查看答案
• 28The oil sludge is burnt in the ______onboard. I’ll show you the ashes.

  A.boiler

  B.main engine

  C.auxiliary engine

  D.incinerator

  开始考试练习点击查看答案
• 29Most marine biological sewage treatment plants consist of all the following statements except ______.

  A.aeration tanks

  B.settling tanks

  C.disinfection agent

  D.anaerobic bacteria (厌氧菌)

  开始考试练习点击查看答案
• 30Great care is dedicated to the removal of _____ from the scavenge air.

  A.gravity

  B.viscosity

  C.density

  D.humidity

  开始考试练习点击查看答案