Today I will continue to share with you some mechanical professional postgraduate examination Xi questions discussed in the mechanical graduate school examination group, some are difficult and some are less difficult, you can practice.
Topic 1:Bolt strength related calculation questions, for mechanical design, mechanical design foundation is a must questions, the key to this kind of questions is the force analysis, set of formula calculation. 
Topic 2:This is the most basic knowledge point, learn to judge the direction of rotation of gears. 
Topic 3:Mechanical Postgraduate Examination Questions. 
Topic 4:This is also a must for mechanical design and mechanical design foundations, and it is also the easiest Xi question. You usually remember some common mistakes. For example:
1. The structure of the shaft itself is wrong (the length of the shaft segment is less than the width of the hub;axial and circumferential fixation problems). 2. Bearing installation error (outer diameter of the inner ring of the bearing, diameter of the fixed structure, inner diameter of the outer ring of the inner ring of the fixed structure;Bearings must be front-mounted or reverse-mounted). 3. Error of keyway (keyway is on the same bus;The length of the keyway is the length of the shaft segment. 4. Error of bearing end cover (there should be a gap between the shaft and the bearing end cover). 
Topic 5:For the analysis of the force of the gear train, it should be noted that the law can only be used for the driving wheel. 
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I wish you all success in the graduate school entrance examination!!
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