Which of the listed problems could produce a high absolute pressure within a flash type evaporator?A.production of high salinity distillateB.seawater feed temperature below 165℃C.a leak in the first stage demisterD.a cracked distillate pump vent line

题目

Which of the listed problems could produce a high absolute pressure within a flash type evaporator?

A.production of high salinity distillate

B.seawater feed temperature below 165℃

C.a leak in the first stage demister

D.a cracked distillate pump vent line

相似考题

1.Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?A.Pressure-reducing valveB.Unloading valveC.Counterbalance valveD.Pressure-relief valve

2.Which of the listed devices is used to measure pressure and convert it to an electrical signal?A.TransducerB.ReducerC.TransformerD.Rectifier

3.Which of the problems listed could cause erosion of the expansion valve disks and seats?A.Overcharging the system with refrigerantB.Faulty compressor suction valveC.Failure of the high pressure cutoutD.Flash gas formed in the liquid line

4.Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?A.A shortage of liquid refrigerant.B.Excessive frost on the evaporator.C.Excessive condenser cooling water.D.Insufficient condenser cooling water flow.

更多“Which of the listed problems could produce a high absolute pressure within a flash type ev ”相关问题

  • 第1题：

    Which of the following printing technologies uses piezoelectric pressure pads to produce smallbubbles that are moved to the paper?（）

    • A、Impact
    • B、Thermal
    • C、Laser
    • D、Inkjet

    正确答案:D

  • 第2题：

    单选题
    Which of the problems listed could be indicated if a sight glass in the refrigerant liquid line is full of bubbles?（）
    A

    Proper refrigerant charge

    B

    Faulty expansion valve

    C

    Insufficient refrigerant

    D

    Solenoid valve stuck open


    正确答案： C
    解析： 暂无解析

  • 第3题：

    单选题
    Which of the conditions listed would cause simultaneous high cylinder firing pressure and low exhaust temperature?（）
    A

    Improper fuel rack positioning

    B

    Lengthy opening of the exhaust valve

    C

    Excessively early injection timing

    D

    Extended light load operation


    正确答案： C
    解析： 暂无解析

  • 第4题：

    单选题
    A flash-type evaporator discharges heated seawater into a chamber that is maintained at a pressure than the vapor pressure of the entering heated seawater, and subsequently the flashed water vapor thereby produced（）
    A

    lower condensing

    B

    higher cooling

    C

    lower cooling

    D

    higher condensing


    正确答案： C
    解析： 暂无解析

  • 第5题：

    单选题
    Which of the listed problems can be a cause of low compression pressure in a diesel engine?（）
    A

    clogged air filter

    B

    compression stroke

    C

    burned exhaust valves

    D

    all of the above


    正确答案： C
    解析： 暂无解析

  • 第6题：

    单选题
    Which of the listed problems could produce a high absolute pressure within a flash type evaporator?（）
    A

    Production of high salinity distillate

    B

    Seawater feed temperature below 165℃

    C

    A leak in the first stage demister

    D

    A cracked distillate pump vent line


    正确答案： B
    解析： 暂无解析

  • 第7题：

    单选题
    Which of the listed devices is used to measure pressure and convert it to an electrical signal?（）
    A

    Transducer

    B

    Reducer

    C

    Transformer

    D

    Rectifier


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    The diesel engine is a type of internal combustion engine which ignites the fuel by injecting it into hot, high pressure air in a （）.
    A

    air bottle

    B

    air compressor

    C

    crank case

    D

    combustion chamber


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    The second stage feed-water temperature and shell absolute pressure in a multistage, flash type, distilling plant is （）
    A

    higher than the first stage feed-water temperature and absolute shell pressure

    B

    lower than the first stage feed-water temperature and absolute shell pressure

    C

    the same as the first stage feed-water temperature and absolute shell pressure

    D

    not related to the feed-water temperature and absolute shell pressure


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    Which of the listed conditions will cause the feed water that has not flashed to vapor in the first-stage of a flash evaporator, to flow into the second-stage?（）
    A

    Gravity siphon effect

    B

    Higher vacuum in the second-stage

    C

    Difference in brine density between first and second stages

    D

    lower pressure in first-stage


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    The primary reason low pressure evaporators produce distillate more efficiently, and with less scale formation, than high pressure evaporators is （）.
    A

    evaporation is accomplished in a vacuum

    B

    due to the higher temperature of the incoming feed

    C

    due to the latent heat of evaporation principle

    D

    evaporation in a submerged medium produces more distillate


    正确答案： D
    解析： 暂无解析

  • 第12题：

    单选题
    Which of the problems listed would came the discharge temperature of an R-12 refrigeration compressor to increase?（）
    A

    Thermal expansion valve frozen open

    B

    Suction gas heat exchanger bypassed

    C

    Condenser clogged or fouled

    D

    High pressure cutout switch inoperative


    正确答案： A
    解析： 暂无解析

  • 第13题：

    单选题
    Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?（）
    A

    Pressure-reducing valve

    B

    Unloading valve

    C

    Counterbalance valve

    D

    Pressure-relief valve


    正确答案： C
    解析： 暂无解析

  • 第14题：

    单选题
    When lighting off an auxiliary boiler, which of the problems listed could cause the burners to sputter?（）
    A

    cold fuel oil

    B

    low fuel oil pressure

    C

    low atomizing steam pressure

    D

    water in the fuel oil


    正确答案： C
    解析： 暂无解析

  • 第15题：

    单选题
    Which of the following problems represent one possible cause of high lube oil consumption in a four stroke diesel engine?（）
    A

    Worn intake valve guides

    B

    Pitted pre-combustion chambers

    C

    Loose valve tappets

    D

    High exhaust back pressure


    正确答案： D
    解析： 暂无解析

  • 第16题：

    单选题
    The domestic fresh water pump starters are controlled by pressure switches which operate when the pressure in the tank varies within predetermined limits as water is drawn offThe word “which” means （）.
    A

    starters

    B

    pressure switches

    C

    pressure

    D

    water


    正确答案： B
    解析： 暂无解析

  • 第17题：

    单选题
    Which of the petroleum products listed has the lowest flash point?（）
    A

    Hydraulic oil

    B

    Lubricating oil

    C

    Diesel oil

    D

    Refrigeration oil


    正确答案： C
    解析： 暂无解析

  • 第18题：

    单选题
    Which of the following problems could cause the high pressure cutout switch to shut down the compressor in a refrigeration system?（）
    A

    A shortage of liquid refrigerant

    B

    Excessive frost on the evaporator

    C

    Excessive condenser cooling water

    D

    Insufficient condenser cooling water flow


    正确答案： C
    解析： 暂无解析

  • 第19题：

    单选题
    The efficiency of a flash type evaporator can be increased by（）
    A

    lowering brine discharge density

    B

    decreasing the absolute pressure of each stage

    C

    increasing the saltwater feed heater temperature

    D

    increasing the pressure at the spray pipe


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    Which of the listed set of conditions indicates early fuel injection timing?（）
    A

    Loss of engine power and high exhaust temperatures

    B

    Higher than normal firing pressure and low exhaust temperatures

    C

    High fuel consumption and high exhaust temperatures

    D

    Lower than normal compression pressure and high exhaust temperature


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    When subjected to high heat from a open flame, or an electric heating element, which of the listed refrigerants will break down and produce phosgene gas?（）
    A

    CO2

    B

    Methyl chloride

    C

    R-22

    D

    Sulphur dioxide


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    Which one of the followings might not be employed to create vacuum for flash type evaporator? （）
    A

    high-pressure steam-driven air-ejector

    B

    motor-driven vacuum pump

    C

    water-motivated air eductor

    D

    centrifuge pump


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    Which of the listed components is considered to separate the high pressure side of a refrigeration cycle from the low pressure side of the cycle?（）
    A

    The condenser and the expansion valve

    B

    The king valve and the solenoid valve

    C

    The compressor and the expansion valve

    D

    The condenser and the solenoid valve


    正确答案： B
    解析： 暂无解析

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