EBK 3I-EBK: WELDING PRINCIPLES & APPLIC
8th Edition
ISBN: 9780176919764
Author: Jeffus
Publisher: VST
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Textbook Question
Chapter 8, Problem 21R
What is dross?
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B
Z
001
2.5 ft
PROBLEM 15.236
The arm AB of length 16 ft is used to provide an elevated
platform for construction workers. In the position shown, arm
AB is being raised at the constant rate de/dt = 0.25 rad/s;
simultaneously, the unit is being rotated about the Y axis at the
constant rate ₁ =0.15 rad/s. Knowing that 20°, determine
the velocity and acceleration of Point B.
Answers: 1.371 +3.76)+1.88k ft/s
a=1.22 -0.342)-0.410k ft/s²
X
F1
3
5
4 P
F2
F2
Ꮎ
Ꮎ
b
P
3
4
5
F1
The electric pole is subject to the forces shown. Force F1
245 N and force F2 = 310 N with an angle
= 20.2°.
Determine the moment about point P of all forces. Take
counterclockwise moments to be positive.
=
Values for dimensions on the figure are given in the following
table. Note the figure may not be to scale.
Variable Value
a
2.50 m
b
11.3 m
C
13.0 m
The moment about point P is 3,414
m.
× N-
If the moment about point P sums up to be zero. Determine
the distance c while all other values remained the same.
1.26
m.
Z
0.2 m
B
PROBLEM 15.224
Rod AB is welded to the 0.3-m-radius plate, which rotates at the
constant rate ₁ = 6 rad/s. Knowing that collar D moves toward end B
of the rod at a constant speed u = 1.3 m, determine, for the position
shown, (a) the velocity of D, (b) the acceleration of D.
Answers: 1.2 +0.5-1.2k m/s
a=-7.21-14.4k m/s²
A
0.25 m
0.3 m
Chapter 8 Solutions
EBK 3I-EBK: WELDING PRINCIPLES & APPLIC
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Ch. 8 - What may be on a coolant reservoir to indicate the...Ch. 8 - Why is the cooling water switched on and off with...Ch. 8 - Why must a filter dryer be used on the air supply...Ch. 8 - List the four common variations of the...Ch. 8 - Define standoff distance.Ch. 8 - What two terms refer to the squareness of a cut?Ch. 8 - What is the pilot arc?Ch. 8 - List five factors that can affect the kerf width.Ch. 8 - What factors affect the bevel angle left on the...Ch. 8 - List five things that are affected by changes in...Ch. 8 - What is dross?Ch. 8 - List some advantages of using a water table.Ch. 8 - Why are most hand PAC torches limited to 100...Ch. 8 - List five special safety concerns for the PAC...Ch. 8 - Describe the three techniques for piercing a plate...Ch. 8 - Prob. 26R
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