【单选题】我国宪法规定:“国家尊重和保障人权. 而根本的和首要的人权是指( )
【单选题】The rate of fuel injection in a diesel engine cylinder depends primarily on _____.
A.
the size of the holes in the fuel nozzle
C.
supply pressure to the pump
D.
shape of the combustion chamber
【单选题】受控变量是机械运动的一种反馈控制系统称( )。
【单选题】Late fuel injection in a diesel engine is indicated by low firing pressure with _________.
A.
low exhaust temperature
C.
mechanical knock in each cylinder
D.
black or gray exhaust smoke
【单选题】受控变量是机械运动的一种反馈控制系统称( )。
【单选题】2-76 受控变量是机械运动的一种反馈控制系统称
【单选题】The two basic types of fuel injection pumps used in the diesel engine are ______ and in-line type.
C.
Distributor Pump Assembly
【单选题】Injection lag in a diesel engine may be caused by_______.
A.
a higher cetane number of fuel oil
B.
the diesel fuel used having a high viscosity
C.
mechanical rigidity in the lube pump mechanism
D.
a decrease rigidity in the fuel pump delivery pressure