大工2012秋液压传动与控制》在线作业3（Hydraulic transmission and control, 2012, 3）.docVIP

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大工2012秋液压传动与控制》在线作业3（Hydraulic transmission and control, 2012, 3）.doc

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大工2012秋液压传动与控制》在线作业3（Hydraulic transmission and control, 2012, 3）

大工2012秋液压传动与控制》在线作业3（Hydraulic transmission and control, 2012, 3） Great works 12 autumn hydraulic transmission and control online homework 3 Multiple-choice questions, multiple-choice questions, judgment questions First, radio questions (5 questions, 25 points) 1. general relief valves are not included in the application. A. keep system pressure constant B. prevents system overloads C. voltage regulation D. remote pressure regulating and unloading valve The correct answer: C full marks: 5 points 2. pumps under normal working conditions, according to the test standards, must ensure that the flow is (). A. geometric flow B. rated flow C. actual flow D. ideal flow The correct answer: B full marks: 5 points When the 3. hydraulic cylinder floats and stops at any position, the instantaneous connection relation of each opening is (). A. O type B. H type C. K type D. P type The correct answer: B full marks: 5 points 4. double acting vane pump rotor, each turn, oil absorption, oil pressure each () times. A. 1 times B. 2 times C. 3 times D. 4 times The correct answer: B full marks: 5 points 5. external feedback variable pressure variable vane pump (). The center of the A. rotor is fixed and the stator can move horizontally The center of the B. rotor is fixed and the stator is fixed The C. rotor is not fixed and the stator center is fixed The D. rotor is not fixed and the stator is not fixed The correct answer: A full marks: 5 points Great works 12 autumn hydraulic transmission and control online homework 3 Multiple-choice questions, multiple-choice questions, judgment questions Two, (a total of 5 multiple-choice questions, a total of 25 points.) 1. which of the following belongs to the flow control valve?. A. throttling valve B. speed control valve C. overflow throttling valve D. balance valve The correct answer: ABC full marks: 5 points 2. what are the components of the throttling circuit?. A. quantitative pump B. flow control valve C. overflow valve D. executive element The