9.Blowers are used with many diesel engines to supply the air necessary for combustion to the
engine’s cylinders. When the pressure of this air is increased above atmospheric pressure,
referred to as supercharging, the power output of engine is increased. In addition, in a two-stroke
engine the air supplied by the blower helps to purge the engine’s cylinders of exhaust gas. This is
referred to as scavenging. Based on these descriptions, please specify the correct statement.
(A)The scavenging and supercharging processes share identical purpose of increasing the static
pressure in the intake pipes.
(B)The use of blow for scavenging and supercharging is due to its characteristics of high-pressure
and low volumetric flow rate.
(C)The blower for marine application is always the centrifugal type as it offers the high speed
characteristic.
(D)The scavenging in a two-stroke engine assists to purge the engine’s exhaust gas which has
beneficial effect for combustion.
寫作批改
VIP與詳解卡管理
私人筆記( 0 )
