中级汽车修理工试题2(含答案)(国外英文资料).doc

中级汽车修理工试题2(含答案)(国外英文资料) The national vocational qualification exam - intermediate auto mechanics simulation exam 2 The red answer is the correct answer, The brand of high-quality carbon structural steel is represented by two Numbers, indicating the average carbon content of steel (). Per several In the following materials, the quality carbon structure steel is (). 40 In the following materials, the engine crankshaft is used (). 45 T8A belongs to (). Carbon tool steel Engine lubricants are too viscous to cause (). The engine is difficult to start cold 6, 40Cr is a kind of adjustable steel, which is used to make the pump shaft, and the final heat treatment method is () for good comprehensive mechanical properties. Quench + heat return Compared with steel, the outstanding feature of cast iron technology is (). Good castability The function of () is to pass the thrust of the camshaft to the push rod. lifter The combustible mixture of the gasoline engine is (). carburetor The idle jet of the carburetor is in the throttle. below The function of the valve is to support and close the valve and close the valve and prevent the valve from beating. Valve springs In the following options, () the engines air supply unit. Air filter The function of the pusher is to pass through the shaft of the camshaft through the force of the shaft. Rocker arm The function of () is to ensure that the engine is supplied with low and strong mixture under idle or small load conditions. Idle speed device 15, in the () range. ? When the engine is cold, the supply is very thick and the air coefficient is required 0.2 ~ 0.6 16, the gas is sucked out of the tank and sent to the float chamber of the carburetor. The petrol pump The mixture of diesel engines is (). The combustion chamber The function of the crank-link mechanism is to change the torque of the burning gas at the top of the piston to the torque of (), and to output mechanical energy through the crankshaft. The crankshaft In the following opti