[单选题]

The scavenging air ports are located at （） that they are just exposed by the upper edge of the piston when the piston is in the bottom dead center position.

A . so a height

B . such a height

C . so high

D . such high

参考答案与解析：

相关试题

On top of scavenging air box is mounted

[单选题]On top of scavenging air box is mounted a strong cast iron frame for each cylinder known as（）A . cooling jacketB . cylinder linerC . piston crownD . cylinder cover

  • 查看答案

    • Cross scavenging requires the fitting of

    [单选题]Cross scavenging requires the fitting of （） to prevent air or exhaust gas escape when the piston is at the top of the stroke.A . a exhaust valveB . a piston skirtC . a piston crownD . an air suction valve

  • 查看答案

    • Clearance volume scavenging in a turboch

    [单选题]Clearance volume scavenging in a turbocharged, four-stroke/cycle diesel engine is accomplished （）.A . during the valve overlap periodB . with only the exhaust valve openC . at a pressure below atmosphericD . without cooling the cylinders or pisto

  • 查看答案

    • Scavenging is （） of exhaust gases by blo

    [单选题]Scavenging is （） of exhaust gases by blowing in fresh air.A . the suctionB . the compressionC . the removalD . the deliver

  • 查看答案

    • The ports are drilled in the liners at a

    [单选题]The ports are drilled in the liners at an angle of approx 20℃ the result being that （） is given a rotary movement.A . the scavenging airB . the exhaust gasesC . the mixed airD . the spray oil

  • 查看答案

    • The street garden is located in ________

    [单选题]The street garden is located in _________used to be a market placeA．whichB．whereC．whoD．what

  • 查看答案

    • Scavenging in a four-stroke/cycle diesel

    [单选题]Scavenging in a four-stroke/cycle diesel engine occurs during the （）.A . last part of the exhaust stroke, and the first part of the intake strokeB . last part of the intake stroke onlyC . early part of the injection stroke onlyD . early part of the p

  • 查看答案

    • The author mentions the ports of Los Ang

    [单选题]The author mentions the ports of Los Angeles and Long Beach to ______.［A］prove they are the largest ports in the United States［B］demonstrate they create many new job opportunities［C］highlight that shipping is less glamorous than making movies［D］empha

  • 查看答案

    • Directional intake ports in diesel engin

    [单选题]Directional intake ports in diesel engines are used to （）.A . reduce air charge turbulenceB . induce air swirlC . deflect hot combustion gas away from the valvesD . oppose the effects of piston induced squish

  • 查看答案

    • As the plunger moves up, the ports are c

    [单选题]As the plunger moves up, the ports are closed and the fuel （） and delivered to the injector nozzle at very high pressure.A . being compressedB . to be pumped upC . is pressurizedD . are built u

  • 查看答案