单选题（章节测试）

Who assists the main driver in safe driving and routine maintenance of trains?

What is involved in the overhaul?

What are the job responsibilities of the on-board mechanist?

What qualities should catenary worker possess?

What is the main function of the vehicle body in a train?

For which purpose are the in-vehicle facilities primarily installed?

How many bogies are typically equipped on a carriage?

What is the function of a coupler buffer device in a train?

What qualities should vehicle inspectors possess?

What is the acceleration and deceleration of trains achieved by?

Why are steam locomotives eliminated?

Which of the following accurately describes the function of the automatic brake valve?

Before starting the train, drivers need to __________ the main circuit breaker, then __________ the automatic and the independent brake valve.

Which of the following is NOT essential for a train driver to ensure smooth and steady train operation?

What is the first step in preparing an EMU train for maintenance?

What kind of overhaul is implemented in a qualified overhaul unit?

How many kilometers or hours of operation should an EMU train complete before an overhaul is conducted?

Which of the following items are included in the “Inspection of both sides of the car body”during the primary overhaul of EMU trains?

During the primary overhaul of EMU trains,how is roof equipment inspection arranged?