Daily 10 Questions in the Moving Equipment Technology Exchange Section – Issue 10

Thread Content

This post was last edited by yxmqh on 2009-10-23 at 13:33. Please hide your replies; otherwise, no rewards will be given! Those who answer all questions correctly in the tenth round can receive a maximum reward of 20 wealth points. 2 Wealth/Question. The hidden method can be viewed by linking to http://bbs.hcbbs.com/thread-492556-1-1.html. Multiple-choice questions: (Question 2 is multiple selection). Answers released: Red indicates the correct option. (Some symbols cannot be displayed, which causes inconvenience when answering questions; we will fix this in the future and apologize for it!) ) This color indicates that no answer is required; all respondents are correct. 1. Which of the following statements is correct? ( ) A. The maximum solid dimension of the hole is greater than its minimum solid dimension ； B. During the machining of the shaft, as the machining allowance is removed, the dimension obtained first and which is considered acceptable is its minimum solid dimension ； C. The fit is tightest when both the hole and the shaft are in their maximum solid condition ； The minimum entity size must be smaller than its maximum limit size. 2. The maximum feature size is ( ). A. Maximum allowable dimension of the hole ； Maximum limit dimension of axis B ； C. Minimum limiting dimension of the hole ； Minimum limit dimension of axis D. 3. Among the following fits, ( ) is a clearance fit. The fit between the hole of A and the φ50±0.025 shaft ； The fit between B’s hole and the shaft ； The fit between C’s hole and the shaft ； The fit between D’s hole and the shaft. 4. In a clearance fit, given that the hole’s tolerance Th = 0.035, EI = 0, es = -0.030, and the maximum clearance Xmax = +0.095, which of the following values is correct? A. Minimum gap Xmin=0.035 ； B. Shaft tolerance Ts=+0.030 ； C. ES=0.035 ； D.ei=-0.060. 5. In the fit between the hole of and the shaft, which of the following results is correct? ( ) A. Minimum gap Xmin=+0.060 ； B. Minimum interference Ymin=0 ； C. Hole tolerance Th=+0.035 ； D. Fit tolerance Tf=+0.065. 6. For a certain base hole system fit, the maximum clearance is Xmax = +0.126 mm, the minimum clearance is Xmin = +0.050 mm, and ei = -0.080 mm. Which of the following values is incorrect? A.EI=0 ； B. Hole tolerance Th=0.046mm ； C-axis tolerance Ts=0.030 ； D.es=-0.110mm. 7. In a fit based on a base hole with a basic dimension of φ55, the maximum clearance Xmax is +0.030 mm, the maximum interference Ymax is -0.060 mm, and the hole tolerance Th is 0.060 mm. Which of the following values is incorrect? A.ES=+0.060mm ； B.EI=0 ； The basic deviation of axis C is +0.030 ； D.ei=-0.060mm. 8. For a pair of mating hole and shaft, the measured size of the shaft is φ40.012 mm, while the size of the hole is φ40 mm. Then the fitting property between the hole and the shaft is ( ). A. Clearance fit ； B. Interference fit ； C. Intermediate fit ； D. Intermediary fit or interference fit. 9. Among the various equations given, which one indicates that the fit between the hole and the shaft is an interference fit? A.ES=es ； B.EI=ei ； C.EI=es ； D.ES=ei ； E.Ei＜ei＜ES ； F.ei＜ES＜es. 10. Which of the following statements regarding fit tolerances is incorrect? ( ) A. The fit tolerance equals the difference between the maximum clearance and the minimum clearance ； B. The tolerance sum equals the difference between the maximum interference and the minimum interference ； C. The fit tolerance is equal to the difference between the maximum clearance and the maximum interference ； D. The fit tolerance is equal to the sum of the tolerances of the hole and the shaft that make up the fit.