Choose best ansr. Select the best single answer for each question below. Each correct answer is worth 2.5 points. (A) Internal bending moments (M)...

Choose best ansr.Select the best single answer for each question below. Each correct answer is worth 2.5 points.(A) Internal bending moments (M) cause ______________ stresses on a cross-section.a. Normalb. Shearc. Normal and sheard. Deflecting(B) The stresses caused by Bending Moments __________________________.a. are uniform over the entire cross sectionb. vary linearly along the direction of the cross-section perpendicular to the bendingmoment vectorc. vary parabolically along the direction of the cross-section perpendicular to the bendingmoment vectord. None of the above(C) Considered alone, a bending moment always creates a combination of _________________ on the cross-section.a. compression and tensionb. positive and negative shearc. moments of inertiad. differential elements(D) Does increasing the depth of a beam always increase the max/min stresses due to bending? Why?a. Yes. ⁄ (if “y” gets bigger, then the magnitude of the stress must increase as well).b. Yes. An increase in depth will always result in the same or lower moment of inertia.c. No. An increase in depth may result in a higher moment of inertia “I”, which maycounteract the increase in “y” and reduce the stress.d. None of the above(A) Like _____________, internal shear forces cause _______________ on a cross-section.a. internal bending moments; shear stressesb. internal normal forces; normal stressesc. internal torsional moments; normal stressesd. internal torsional moments; shear stresses(B) The stresses caused by internal shear forces vary ______________ across the dimension ofthe cross-section ______________ to the internal shear force.a)linearly; parallelb)parabolically; parallelc)linearly; perpendiculard) parabolically; perpendicularWhat units does the first moment of area (Q) have?a)(distance)2b)(distance)3c)(distance)4what does shear flow (q) represent?a)The shear stress acting along the longitudinal interface between two elements of a cross-sectionb)The force per unit length acting along the longitudinal interface between two elements of a cross-sectionc)The force acting along the longitudinal interface between two elements of a cross- sectiond)The deformation caused along the longitudinal interface between two elements of a cross-section

Select the best single answer for each question below. Each correct answer is worth 2.5 points.(A) Internal bending moments (M) cause ______________ stresses on a cross-section.a. Normalb....