In accordance with the general principles followed in the measurement of the work of other trades, masonry work is measured "____."

A. net removed
B. net in place
C. composite in place
D. composite removed


Answer: B

Trades & Technology

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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.

Trades & Technology

A building that receives a total score of 55 points in the LEED-NC rating system is recognized at

A) Sustainable level. B) Gold level. C) Silver level. D) Certified level. E) Green level.

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The lens equation says that if an object is placed at a distance p from a lens, and an image is formed at a distance q from the lens, then the focal length f satisfies the equation 1/f = 1/p + 1/q. Assume that p = 2.3 ± 0.2 cm and q = 3.1 ± 0.2 cm.

a. Estimate f, and find the uncertainty in the estimate. b. Which would provide a greater reduction in the uncertainty in f: reducing the uncertainty in p to 0.1 cm or reducing the uncertainty in q to 0.1 cm?

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Determine the natural frequency of a pendulum whose length is 15 ft.

What will be an ideal response?

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