When you are installing interior wood doors, it is important to remember that four hinges must be used when
the door height is greater than _____.
a. 6-1/2 feet
b. 7 feet
c. 8 feet
d. 9 feet
b
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Debe protegerse cualquier pieza con corriente expuesta que funcione a _____ o más entre terminales.
a. 15V b. 50V c. 240V d. 600V
The predominant direction of surface roughness is called:
A. Waviness B. Lay C. Roughness D. Roughness width
Determine the windows required for the residence in Appendix B.
What will be an ideal response?
Problem 1.56 In an alternative design for the structure of Prob. 1.55, a pin of 10-mm diameter is to be used at A. Assuming that all other specifi¬cations remain unchanged, determine the allowable load P if an over¬all factor of safety of 3.0 is desired. Problem 1.55 In the structure shown, an 8-mm-diameter pin is used at A, and 12-mm-diameter pins are used at B and D. Knowing that the ultimate shearing stress is 100 MPa at all connections and that the ultimate normal stress is 250 MPa in each of the two links joining B and D, determine the allowable load P if an overall factor of safety of 3.0 is desired.
