I am a teacher and need help creating exam problems. Please recommend more incorrect answers to the following problem but do not explain your logic. At a point subjected to plane stress on the surface of a drill bit, the stresses are σx = 11 ksi, σy = 0 ksi, and τxy = 6 ksi. Determine the magnitude of the maximum in-plane shear stress at the point.

Create 5 variations of the following problem but do not show the answers. At a point subjected to plane stress on the surface of a structural-steel member, the stresses are σx = –90 MPa, σy = –100 MPa, and τxy = –40 MPa. Determine the diameter D of the corresponding in-plane Mohr’s circle.

Create 5 variations of the following problem but do not show the answers. At a point subjected to plane stress on the surface of a structural member, the stresses are σx = 95 MPa, σy = 90 MPa, and τxy = 10 MPa. Determine the magnitude of the absolute maximum shear stress at the point.

I am a teacher and need help creating exam problems. Please recommend more incorrect answers to the following problem but do not explain your logic. At a point subjected to plane stress on the surface of a ladder rung, the stresses are σx = –140 psi, σy = 0 psi, and τxy = –55 psi. Determine the angle θs corresponding to the orientation of the maximum in-plane shear stress at the point.

I am a teacher and need help creating exam problems. Please recommend more incorrect answers to the following problem but do not explain your logic. At a point in a body subjected to plane strain, the strains are εx = 230 με, εy = –660 με, and γxy = –170 μrad. Determine normal strain εn at the point for a clockwise coordinate rotation of 11°.

Create 5 variations of the following problem but do not show the answers. At a point subjected to plane stress on the surface of a structural-steel member, the stresses are σx = 30 MPa, σy = –100 MPa, and τxy = 30 MPa. Determine the radius R of the corresponding in-plane Mohr’s circle.

Create 5 variations of the following problem but do not show the answers. At a point subjected to plane stress on the surface of a structural-steel member, the stresses are σx = 9 ksi, σy = 19 ksi, and τxy = –4 ksi. Determine the center σcenter of the corresponding in-plane Mohr’s circle.

Create 5 variations of the following problem but do not show the answers. At a point in a body subjected to plane strain, the strains are εx = 300 με, εy = 70 με, and γxy = –500 μrad. Determine the angle θp corresponding to the orientation of the principal planes at the point.

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Why is flow sensor calibration important?