Friends, in 2024, a new version of the textbook will be released in Yijian Electromechanical, and two editions of the textbook will be published in a year.
The first edition of the 2023 One Day Textbook was printed in January 2024.
I believe that those who get the textbook to learn will find that there are several obvious errors in this version of the textbook.
No, the publishing house printed a new edition in March, and some of the content was modified! Yes, you read that right, and secretly made changes! They are all 2024 edition of textbooks, and new textbooks have been released, and the content in them is different, and it also involves several important case test points! These are all important test points for the exam.
So if you listen to the class, the teacher doesn't find these mistakes in the textbook, then I'm sorry, remember to correct these mistakes.
Fortunately, this year's newly printed mechanical and electrical textbook has a correction note, and the changes are shown in the figure:
This involves such as bearing clearance measurement, tower equipment hydrostatic test, etc. are important test points, friends pay attention.
Xiaobian sorted out the content of these corrections into a text version and put it below, and those who need it can copy and paste.
2024 Edition Level 1 Construction Engineer Examination Book "Mechanical and Electrical Engineering Management and Practice" Amendment Instructions
The permissible deviation of page 78 verticality should not be greater than 1.5%.
On page 97, the fourth line of the tourist tuyere was changed to a swirl seal.
146页单侧间隙应为顶间隙的1/2~2/3
Page 153, line - with air or ammonia as the medium, change to air or nitrogen as the medium
214 p. 2) Hydrostatic test
(2) At the highest and lowest points of the tower and easy to observe, each set up a block pressure gauge. The range of the two pressure gauges should be the same, and the calibration should be qualified and the accuracy of the pressure gauge should not be less than 1.6 within the validity period of the calibration. The range of the pressure gauge is not less than 1.5 times and not more than 3 times the test pressure. The test pressure is based on the reading of the pressure gauge installed at the highest point of the equipment.
(3) After filling with liquid, rise to the design pressure, stabilize the pressure for 10min, confirm that there is no leakage, continue to rise to the specified test pressure, the pressure holding time is not less than 30min, and then reduce the pressure to 80% of the specified test pressure, and conduct a comprehensive inspection of all welded joints and connection parts, no leakage, no visible deformation, no abnormal sound during the test, which is qualified.
(4) For steel towers with a standard lower limit of tensile strength greater than or equal to 540MPa, no cracks were found in surface nondestructive testing after water discharge.
Page 226 GA1 long-distance pipelines should be: long-distance gas pipelines with a design pressure greater than or equal to 4.0MPa, and a design pressure greater than or equal to 6. 3MPa long-distance oil pipeline.
Page 301, line 11, 100m*100mm, read 100mm*100mm; Line 17 30~80m is changed to 30~80mm