In 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

试卷相关题目

• 1If 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

  开始考试点击查看答案
• 2The 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

  开始考试点击查看答案
• 3Which 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.

  开始考试点击查看答案
• 4A centrifugal pump may fail to deliver water when first started if the ______.

  A.water seal pipe is plugged

  B.pump is not primed

  C.seal ring is improperly located

  D.impeller is flooded

  开始考试点击查看答案
• 5A pump shaft that is bent or distorted should normally be ______.

  A.repaired by a suitable welding process

  B.straightened by applying heat and torsion

  C.reconditioned by metallizing and machining

  D.replaced with a satisfactory spare

  开始考试点击查看答案
• 6Oily 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

  开始考试点击查看答案
• 7When 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

  开始考试点击查看答案
• 8Which is the pollution prevention equipment、

  A.booster pump

  B.evaporator

  C.incinerator

  D.cooler

  开始考试点击查看答案
• 9The oil sludge is burnt in the ______onboard. I’ll show you the ashes.

  A.boiler

  B.main engine

  C.auxiliary engine

  D.incinerator

  开始考试点击查看答案
• 10Most 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)

  开始考试点击查看答案