1.

Given the angle of rotation is small and the materials remainlinear elastic, which statement below is incorrect for thetorsional behavior of a long straight circular shaft:

	a.	Straight member remains straight
	b.	Section-shape remains unchanged
	c.	End of member may warp
	d.	Plane section remains plane

2.

The unit for a shaft’s polar moment of inertia Jis:

	a.	m2
	b.	m3
	c.	kPa
	d.	m4

3.

Provided that the bending formation of a straight member issmall and within elastic range. Which of the following statementsis incorrect? (select all that apply)

	a.	The length of the longitudinal axis remains unchanged
	b.	Cross-sections remains perpendicular to the longitudinalaxis
	c.	Plane sections remain plane
	d.	In-plane distortion of cross-sections with respect to thelongitudinal axis is negligible

4.

Which of the following statements is correct for bending of astraight member?

	a.	Bending stress is inversely proportional to the moment ofinertia of the section
	b.	Bending stress does not depend on the moment of inertia of thesection
	c.	Bending stress is proportional to the moment of inertia of thesection
	d.	Bending stress is proportional to the square of the moment ofinertia of the section

5.

Which of the following statements is true? The flexure formulafor a straight member can be applied only when: (select all thatapply)

	a.	the principal axes have their origin at the centroid
	b.	bending remains in the elastic region
	c.	bending occurs about axes that represent the principal axes ofinertia for the section
	d.	the principal axes are orientated along an axis of symmetry, ifthere is one, and perpendicular to it