EGR 283 Quiz #7 Solution


All results must be given to the precision used in the textbook.  Assume that the data are known to the same precision.  Thus, when a value of 2 kips is given, it is assumed that it is known to 3 digits; i.e., 2.00 kips.  You may receive partial credit if you show your work (on the reverse).  The units requested must be given with all answers. Print this page and write the answers in the blanks.  Sign the statement at the bottom.  Then submit the page before class on Monday.

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1. The vertical shear on a beam of 0.8 m square cross section is 15 kN.  What is the value of Q that applies to the maximum horizontal shearing stress? 0.0640 m3
2. The shearing force on each nail in a line of nails 1.5 inches apart (lengthwise along the beam's length) is 90 pounds.  What is the value of the shear flow? 60.0 lb/in
3. A box beam is 8 inches square (outside measurement) and 4 inches square (inside measurement).  What is the moment of inertia of this cross section? 320 in4
4. For a W 11 x 22 shape with a vertical shear of 12 kN, what is the value of the shear flow at the tip of a flange? zero
5. True or False?  In Figure 6.35, the shear flow arrows between D and D' should be reversed. (circle one) True
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