Theoretical Questions for the Moving Equipment Technology Exchange Section – Issue 41

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This post was last edited by yxmqh on 2010-3-5 at 16:17. Please hide your replies; the method for doing so can be found at the link http://bbs.hcbbs.com/thread-492556-1-1.html. Otherwise, no reward will be given! Scoring method for this issue: Multiple-choice questions: Answer as usual, 2 points per question. Those who answer all questions correctly in issue 41 can receive a maximum reward of 20 wealth points. 1. The elliptical pad bearing has a simple structure; compared with the circular pad bearing, the elliptical pad bearing has ( ). A、Poor heat dissipation ； B. Low load-bearing capacity ； C. Unstable operation ； D. High power consumption. 2. The elliptical pad bearing has a simple structure; compared with the circular pad bearing, the elliptical pad bearing has ( ). A、Poor heat dissipation ； B. Low load-bearing capacity ； C. Low power consumption ； D. Stable operation. 3. The elliptical pad bearing has a simple structure; compared with the circular pad bearing, the elliptical pad bearing has ( ). A、Poor heat dissipation ； B. Low power consumption ； C. High load-bearing capacity ； D. Unstable operation. 4. The emergence of oval bearings and tilting pad bearings was mainly to address the ( ) problems that may occur in sliding bearings during high-speed rotation. A. Operating temperature ； B. Load capacity ； C. Wear resistance ； D. Oil film oscillation. 5. When assembling the thin-walled bearing shell with the bearing housing, in order to achieve a tight fit, an appropriate amount of interference is required; the split surface of the thin-walled bearing shell is ( ) than that of the bearing housing. A. A little higher ； B、Lower ； C、Level and equal elevation ； D. A bit higher or a bit lower. 6. When assembling the thin-walled bearing shell with the bearing housing, in order to achieve a tight fit, an appropriate amount of interference is required; the split surface of the bearing housing is ( ) than that of the thin-walled bearing shell. A. A little higher ； B、Lower ； C、Level and equal elevation ； D. A bit higher or a bit lower. 7. Mitchell bearings belong to ( ) thrust sliding bearings. A. Fully fixed type ； B、Fixed multi-block type ； C. Multi-block movable type ； D. Fixed multi-block or movable multi-block type. 8. Kingsber bearings belong to ( ) thrust sliding bearings. A. Fully fixed type ； B、Fixed multi-block type ； C. Multi-block movable type ； D. Fixed multi-block or movable multi-block type. 9. Partially lubricated bearings belong to ( ) thrust sliding bearings. A. Fully fixed type ； B、Fixed multi-block type ； C. Multi-block movable type ； D. Fixed multi-block or movable multi-block type. 10. The elliptical pad bearing has a simple structure; compared with the circular pad bearing, the elliptical pad bearing has ( ). A. Good heat dissipation ； B. Low load-bearing capacity ； C. Unstable operation ； D. Low power consumption. Answer key: 1.D 2.D 3.C 4.D 5.A 6.B 7.C 8.C 9.A 10.A