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单选题 ( )is a method by which energy in the cylinder exhaust gas气缸中废气的能量 is used to provide air forcombustion
学科：轮机英语
时间：2023-09-23 06:25:14
题目1单选题
At rated额定 engine load负载,负荷 and running speed, the diesel engine turbocharger增压器 is powered给予动力 by( )A. belt driveB. exhaust gases废气,排气C. electric motorD. friction clutch
题目2单选题
The operating speed工作转速 of a turbocharger is directly dependent upon( )A. engine speedB. engine load主机负载C. intake manifold pressureD. atmospheric pressure
题目3单选题
Gas exchange换气, which is a basic part of the cycle of an internal combustion engine内燃机, is the supply供给 of( )A. normal air and removal of compressed airB. fuel oil and combustion of the atomized oilC. fresh air and removal移除 of exhaust gasesD. fresh air and removal of extra heat
题目4单选题
The pressure of the air in the inlet manifold is arranged to be higher than the pressure in thethe exhaust manifold so that on entering the cylinder it sweeps out扫除 the ( ) and fills the cylinder with a fresh charge新鲜空气填充A. fresh airB. waste energyC. exhaust gases废气D. dirty
题目5单选题
Air and exhaust valves进排气阀 are opened into the cylinder mechanically机械式地 by push rods推杆 and rocker arms摇臂 operated by the( ), and closed by the combination of pressure within the cylinder andthe valves springsA. camshaft凸轮轴B. crankshaftC. tailshaftD. thrustshaft
题目6单选题
( )is a method by which energy in the cylinder exhaust gas气缸中废气的能量 is used to provide air forcombustionA. ScavengingB. Turbocharging增压C. Speeding upD. Blower
题目7单选题
The compression压缩 raises the temperature of the air and as the piston reaches the end of thisstroke, a controlled amount of( ) is injected喷射 into the cylinder in the form of a fineA. airB. fuel燃油C. the mixture of air and fuelD. energy
题目8单选题
Compression of the charge of air takes place and fuel is injected into the hot compressed air as( )is approachedA. top dead centre(TDC)上止点B. bottom dead centreC. induction strokeD. expansion stroke
题目9单选题
The use of the fins散热片 in the air cooler空气冷却器( )the effective heat transfer surface area and allowsA. reduction in the physical external dimensions of the cooler.A. increasesB. decreasesC. reducesD. interrupts
题目10单选题
Cylinder conditions状态,条件 must be kept within certain某个 limits限制 in terms of maximum( )1 pressure压力 ; 2 temperature温度A. 1B. 2C. 1 or 2D. (1 and 2)