An unbalanced glulam beam can only be used as a single -span beam, while a balanced glulam beam can be used in all situations. Why then, are unbalanced glulam beams made?
What will be an ideal response?
For a single-span, an unbalanced beam is more economical than a balanced glulam beam.
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How can the direction of rotation of any three phase motors be reversed?
What will be an ideal response?
In Figure E-35 are some pole-zero plots of transfer functions of systems of the general form 
in which A = 1, the z’s are the zeros and the p’s are the poles.
(a) Which one(s) have a magnitude frequency response that is nonzero at ? = 0 ?
(b) Which one(s) have a magnitude frequency response that is nonzero as ? ? ??
(c) There are two which have a bandpass frequency response (zero at zero and zero at infinity). Which one is more underdamped (higher Q)?
(d) Which one has a magnitude frequency response whose shape is closest to being a bandstop filter?
(e) Which one(s) have a magnitude frequency response that approaches K / ?6 at very high frequencies (K is a constant)?
(f) Which one has a magnitude frequency response that is constant?
(g) Which one has a magnitude frequency response whose shape is closest to an ideal lowpass filter?
(h) Which one(s) have a phase frequency response that is discontinuous at ? = 0?
A deficiency of ____________________ contributes to periodic ophthalmia (moon blindness).
Fill in the blank(s) with the appropriate word(s).
The mortar commonly recommended for use in masonry walls in seismic regions is
A) Type P. B) Type I. C) Type S. D) Type II. E) Type N.