题目内容
（请给出正确答案）
[单选题]
Beams are （) straight members that carry loads （) their longitudinal axis.
A.short, perpendicular to
B.long, perpendicular to
C.short, parallel to
D.long, parallel to
提问人：网友happy_weixiu
发布时间：2022-01-07
题目内容
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第6题
In order to properly design a beam, it is import to know the variation of ( ) and ( ) along its axis in order to find the points where these values are a maximum.
A、the axial force, torsional moment
B、the axial force, bending moment
C、the shear, torsional moment
D、the shear, bending moment
第7题
Although the choice of a sign convention for a beam is ( ), we will use the one often used in engineering practice. The positive directions are as follows: the distributed load acts ( ) on the beam; the internal shear force causes a ( ) rotation of the beam segment on which it acts; and the internal moment causes ( ) in the top fibers of the segments.
A、specified; downward; clockwise; compression
B、arbitrary; downward; clockwise; compression
C、arbitrary; upward; counterclockwise; compression
D、arbitrary; downward; clockwise; tension
第8题
The cross section of a straight beam remains plane when the beam deforms due to bending. This causes ( ) on one side of the beam and ( ) on the other side. The neutral axis is subjected to ( ) .
A、tensile stress; compressive stress; zero stress
B、compressive stress; tensile stress; maximum normal stress
C、shear stress; normal stress; zero stress
D、normal stress; shear stress; zero stress
