MATERIALS SCIENCE+ENGINEERING:WILEY PLUS
10th Edition
ISBN: 9781119815242
Author: Callister
Publisher: WILEY
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Problem 2: The Douglas fir beam below supports uniform live (WL) and dead loads (WD) as shown
below. Assume the total distributed load is 700 lb/ft.
WD=300#/PT. W₁ = 400#
W₁ = 400#/FT-
J J J J I J J J
L=161
a) Assuming an alllowable deflection of L/360, compute the magnitude of the allowable deflection.
b) Using an 8"x12" timber beam (see Table A1-b on page 567 of your text for properties) compute
the actual deflection. Assume E = 1.6 x 100 psi.
c) Based on your answers for parts a and b, determine if an 8"x12" timber beam is safe for this
application
Q1: What is the orientation of voltage regulation value (positive or negative) of
alternator loaded by capacitive load? Explain the effect of armature reaction on
voltage regulation for this load? Draw the load characteristics of alternator for
capacitive, inductive, and inductive loads?
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