[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 stroke

B . last part of the intake stroke only

C . early part of the injection stroke only

D . early part of the power stroke

参考答案与解析:

相关试题

If a four-stroke/cycle diesel engine is

[单选题]If a four-stroke/cycle diesel engine is running at 1550 RPM, the speed of the camshaft will be().A . 525 RPMB . 775 RPMC . 1550 RPMD . 1800 RPM

  • 查看答案
  • In a four-stroke/cycle diesel engine, th

    [单选题]In a four-stroke/cycle diesel engine, the camshaft rotates at ()A . twice the crankshaft speedB . half the crankshaft speedC . the same speed as that of the crankshaftD . a speed independent of that of the crankshaft

  • 查看答案
  • The working cycle of a four-stroke diese

    [单选题]The working cycle of a four-stroke diesel engine consists of four events:()(1) compression(2) expansion(3) exhaust(4) suctionThe correct sequence isA . (4)-(2)-(3)-(1)B . (4)-(3)-(1)-(2)C . (4)-(3)-(2)-(1)D . (4)-(1)-(2)-(3)

  • 查看答案
  • If fuel injection to a four-stroke/cycle

    [单选题]If fuel injection to a four-stroke/cycle diesel engine begins earlier than designed, ignition may be delayed because the ().A . cylinder compression pressure may not be high enoughB . cylinder compression temperature may be too highC . fuel oil injec

  • 查看答案
  • The camshaft on a four-stroke/cycle dies

    [单选题]The camshaft on a four-stroke/cycle diesel engine provides a means to operate the ().A . fuel injectorsB . exhaust valvesC . intake valvesD . all of the above

  • 查看答案
  • On a four-stroke diesel engine, when the

    [单选题]On a four-stroke diesel engine, when the piston is driven downwards by the expanding gas, it delivers power to the crankshaft through the ().A . thrust blockB . sounding rodC . connecting rodD . push rod

  • 查看答案
  • For an ordinary four-stroke diesel engin

    [单选题]For an ordinary four-stroke diesel engine the exhaust valves close ().A . after TDCB . before TDCC . after BDCD . before BDC

  • 查看答案
  • Marine four-stroke diesel engines are ma

    [单选题]Marine four-stroke diesel engines are mainly ().A . of crosshead typeB . of trunk piston typeC . of low speed typeD . all the above

  • 查看答案
  • With four-stroke engines, it takes four

    [单选题]With four-stroke engines, it takes four revolutions of the crank shaft to make () power stroke(s).A . 1B . 2C . 4D . 8

  • 查看答案
  • The four-stroke engine is used for () an

    [单选题]The four-stroke engine is used for () and sometimes for main propulsion with a gearbox to provide a propeller speed of between 90 to 120 rev/min.A . alternatorB . turbo-chargerC . remote controllerD . windla

  • 查看答案
  • Scavenging in a four-stroke/cycle diesel