Sure enough, the competition has changed questions!

Zhang Jianguo's words were like a bombshell, causing huge waves. It turned out that the contestants who were complacent about stealing the questions were ashamed. In order to get through the questions of the competition, the price they paid was too high, and some even included her body!

Several senior passenger transport engineers sitting in the front row have become accustomed to playing such games over the years. They not only make them both rich and lustful, but also free and easy. They just thought that the new Director Zhang couldn't leave them in setting questions. Who knew that he quietly got the competition questions from his fellow Liaodong Railway Bureau!

This is undoubtedly great news for those contestants who have no idea about the questions. They clapped excitedly and refused to stop when their hands hurt. They were happy and proud of having such a head of the passenger transport system!

Zhang Jianguo reached out to pressure and signaled everyone to stop applause, and then continued: "Although I don't know what the specific topic is, it will be unchanged. At that time, my requirement was to focus on passenger transport regulations and supplement other regulations and systems, with a ratio of 70% and 30%. As the top technical experts in the passenger transport system, we must not only master the rules that the passenger transport system should know and understand, but also master the knowledge related to passenger transport business. The competition is about everyone's comprehensive technical business qualities!"

The warm applause gradually stopped, and Zhang Jianguo solemnly announced: "The fifth technical exhibition competition of the passenger transport system of Songjiang Railway Bureau is now starting! Please ask the invigilator to start work, and other unrelated personnel leave!"

After the leaders and coaches of each branch left the venue, Zhang Jianguo took apart the seal of the file bag on the spot and took out the theoretical and practical questions of the train conductor, salesman and conductor team. This bureau's technical performance competition was a continuous test of theory and practice, with a period of 2 and a half hours and a total of 150 minutes. After the host announced the rules of the competition, three senior engineers from the passenger transport department took over the test questions of the three groups with complex moods, and copied the competition questions on the temporary blackboard set up in front of the three groups.

The contestants immediately began to copy the questions on the all-white test paper and began to answer the questions. Because when the host explained the rules and precautions of the competition, he had clearly informed that the number of questions in this competition was large, and the contestants should choose to answer the questions first, otherwise there might not be enough time. The contestants copied one question and answered one question. When they encountered something they didn’t know or were not sure, they would be free and answered the next question.

The answering speed should not only be fast, but also neat handwriting, which tests the skills of the contestants. Xiao Yuanhang is undoubtedly a master in this regard. Not only is the answering speed fast, but his handwriting is also very neat. As Director Zhang Jianguo said, about 70% of the test questions are in terms of passenger transport regulations and operating standards. This part is not difficult for contestants who can come to the railway bureau to participate in the competition. However, 30% of the relevant regulations and knowledge are unpopular, which makes many contestants sweat!

Xiao Yuanhang found that 30% of the questions in the relevant regulations and knowledge were not only unpopular, but also extremely "cold"! The reason was that the topic was not based on the content of the rules, but instead asked questions about the side questions. It was obvious that the expert who set the questions was very active and interested, and asked questions very casually, which made it difficult for the answerer to grasp because there was no such problem in the rules!

There is a question in the examination questions in the theoretical part about the safety of passenger trains fire prevention and explosion prevention: Open fires are prohibited on passenger trains, so why can stoves be used on dining trucks?

Xiao Yuanhang believed that this question could stump a large number of contestants because everyone understood this question, but there was no way to answer it. As a result, he learned later that everyone had a variety of answers, some answers were used for cooking for flight attendants and passengers; some answers were allowed to use stoves on the dining car; what was even more funny was that some people answered why they would still hang a dining car if they were not allowed to use stoves? As a result, such answers were wrong for inaccurate answers.

Xiao Yuanhang worked for many years in his previous life. Although he didn't know what he agreed to accurately, he answered decisively after thinking about it: Because the stove on the dining car is a safe source of fire! It was later proved that only Xiao Yuanhang, the only one of the 45 contestants, answered correctly.

There are several questions in the practical part that are even more outrageous. One of them is about the emergency braking of passenger trains: There is a regulation in the technical regulations on how to use an emergency braking valve. When growing up, you must first look at the air meter. If the air meter pointer has dropped by 1 kg from a fixed pressure, the emergency braking valve shall not be used again. Why? What is the meaning of the air meter pressure of 6 kg?

Passenger transport systems are all users of equipment, as long as they know how to use them, there is no need to know its technical principles at all. This question is technically just about the technical aspects. The emergency brake valve on a passenger train is an emergency stop when an emergency situation endangers driving safety occurs. As for why the emergency valve cannot be used when the air meter pointer on the downhill has dropped by 1 kilogram from a fixed pressure, as a passenger flight attendant, it is not necessary to know it at all. It is strictly implemented in accordance with the regulations. But this problem happened in this competition.

The braking system of railway trains is achieved by high-pressure wind. Before the train starts, the train inspectors conduct air gauge pressure experiments. The specified wind pressure of passenger trains is 6 kilograms, and the specified wind pressure of freight trains is 5 kilograms. In the 1990s, it was changed to the internationally-common pressure unit KPA (kilopa), the passenger train is 600KPA, and the freight train is 500KPA.

As for the first question, when the air gauge pressure has dropped by 1 kg from a fixed pressure, Xiao Yuanhang didn't know why he could not use the emergency brake valve to stop the car, but the second question is what the meaning of the air gauge pressure of 6 kg? He knew. Because in his previous life, he was chatting with a pilot in a previous life. When he thought that the head and the driver always used radio to shout the tail wind pressure 600KPA when they were on the wind pressure, he asked him what it meant. The inspector said that the train relied on the wind system to push the brake shoe to press the wheels to achieve braking. 600KPA means that the pressure per square centimeter of the contact surface of the brake shoe and the wheel is 600KPA, which is what we usually call 6 kg!

Xiao Yuanhang inferred from this that the previous problem is that the wind pressure of the passenger train is 1 kilogram higher than that of the freight train, in order to ensure the absolute safety of the passenger train. If the emergency braking and stop of the passenger train on the growing downhill is to achieve the emergency braking and stopping of the passenger train, it is necessary to achieve a stronger braking force. When the wind pressure has dropped by 6 kilograms from a fixed pressure of 6 kilograms, that is, the pressure is only 5 kilograms, it is not enough to stop the passenger train safely. Therefore, it is stipulated that even if an emergency occurs, the emergency brake valve should not be used again. In this case, if the emergency brake valve is used, the train may not only not stop on the growing downhill, but also exhaust the wind power of the train brake system, and the train loses its braking capacity, causing the train to "gret sheep" on the growing downhill, resulting in serious consequences of vehicle destruction and death!

Afterwards, Xiao Yuanhang's inference was correct again!

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