Welding: Principles and Applications (MindTap Course List)
8th Edition
ISBN: 9781305494695
Author: Larry Jeffus
Publisher: Cengage Learning
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Textbook Question
Chapter 26, Problem 29R
Why is brine quenching faster than water quenching?
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Students have asked these similar questions
Problem (17): water flowing in an open channel of a rectangular cross-section with width (b) transitions from a
mild slope to a steep slope (i.e., from subcritical to supercritical flow) with normal water depths of (y₁) and
(y2), respectively.
Given the values of y₁ [m], y₂ [m], and b [m], calculate the discharge in the channel (Q) in [Lit/s].
Givens:
y1 = 4.112 m
y2 =
0.387 m
b = 0.942 m
Answers:
( 1 ) 1880.186 lit/s
( 2 ) 4042.945 lit/s
( 3 ) 2553.11 lit/s
( 4 ) 3130.448 lit/s
Problem (14): A pump is being used to lift water from an underground
tank through a pipe of diameter (d) at discharge (Q). The total head
loss until the pump entrance can be calculated as (h₁ = K[V²/2g]), h
where (V) is the flow velocity in the pipe. The elevation difference
between the pump and tank surface is (h).
Given the values of h [cm], d [cm], and K [-], calculate the maximum
discharge Q [Lit/s] beyond which cavitation would take place at the
pump entrance. Assume Turbulent flow conditions.
Givens:
h = 120.31 cm
d = 14.455 cm
K = 8.976
Q
Answers:
(1) 94.917 lit/s
(2) 49.048 lit/s
( 3 ) 80.722 lit/s
68.588 lit/s
4
Problem (13): A pump is being used to lift water from the bottom
tank to the top tank in a galvanized iron pipe at a discharge (Q).
The length and diameter of the pipe section from the bottom tank
to the pump are (L₁) and (d₁), respectively. The length and
diameter of the pipe section from the pump to the top tank are
(L2) and (d2), respectively.
Given the values of Q [L/s], L₁ [m], d₁ [m], L₂ [m], d₂ [m],
calculate total head loss due to friction (i.e., major loss) in the
pipe (hmajor-loss) in [cm].
Givens:
L₁,d₁
Pump
L₂,d2
오
0.533 lit/s
L1 =
6920.729 m
d1 =
1.065 m
L2 =
70.946 m
d2
0.072 m
Answers:
(1)
3.069 cm
(2) 3.914 cm
( 3 ) 2.519 cm
( 4 ) 1.855 cm
TABLE 8.1
Equivalent Roughness for New Pipes
Pipe
Riveted steel
Concrete
Wood stave
Cast iron
Galvanized iron
Equivalent Roughness, &
Feet
Millimeters
0.003-0.03 0.9-9.0
0.001-0.01 0.3-3.0
0.0006-0.003 0.18-0.9
0.00085
0.26
0.0005
0.15
0.045
0.000005
0.0015
0.0 (smooth) 0.0 (smooth)
Commercial steel or wrought iron 0.00015
Drawn…
Chapter 26 Solutions
Welding: Principles and Applications (MindTap Course List)
Ch. 26 - What gives metals their desirable properties?Ch. 26 - What is heat?Ch. 26 - What are the basic units of measure for heat?Ch. 26 - What is sensible heat?Ch. 26 - Prob. 5RCh. 26 - What does the color of light given off from a hot...Ch. 26 - Prob. 7RCh. 26 - In steel-making, what is ore combined with in the...Ch. 26 - Prob. 9RCh. 26 - What is an alloy?
Ch. 26 - Using Figure 26-18, answer the following...Ch. 26 - What is a eutectic composition?Ch. 26 - Using Table 26-3, what are the lowest and highest...Ch. 26 - Approximately how many degrees wide is the...Ch. 26 - Referring to Figure 26-20, what color would...Ch. 26 - Referring to Figure 26-20, what is the approximate...Ch. 26 - Prob. 17RCh. 26 - Referring to Figure 26-20, above what temperature...Ch. 26 - Prob. 19RCh. 26 - What is known as the critical temperature of...Ch. 26 - Can a metal have all the mechanical properties at...Ch. 26 - What other properties can a metal's hardness...Ch. 26 - Which property, brittleness or ductility, will let...Ch. 26 - What is toughness?Ch. 26 - What are the common types of strength...Ch. 26 - Prob. 26RCh. 26 - What are the three steps in precipitation...Ch. 26 - How do ferrite and cementite work together to form...Ch. 26 - Why is brine quenching faster than water...Ch. 26 - What can be done to speed up the quenching rate in...Ch. 26 - Why is the formation of martensite a problem when...Ch. 26 - How can the effects of cold working be removed?Ch. 26 - Prob. 33RCh. 26 - Referring to Figure 26-20, what would the preheat...Ch. 26 - Why must the stress-relieving temperature be kept...Ch. 26 - What properties can annealing produce in metals?Ch. 26 - How long does it take the weld metal to go through...Ch. 26 - What are some sources of hydrogen that can...Ch. 26 - How can nitrogen get into an SMA weld?Ch. 26 - What are some of the problems that oxygen can...Ch. 26 - When do cold cracks develop?Ch. 26 - What is carbide precipitation?
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- The flow rate is 12.275 Liters/s and the diameter is 6.266 cm.arrow_forwardAn experimental setup is being built to study the flow in a large water main (i.e., a large pipe). The water main is expected to convey a discharge (Qp). The experimental tube will be built at a length scale of 1/20 of the actual water main. After building the experimental setup, the pressure drop per unit length in the model tube (APm/Lm) is measured. Problem (20): Given the value of APm/Lm [kPa/m], and assuming pressure coefficient similitude, calculate the drop in the pressure per unit length of the water main (APP/Lp) in [Pa/m]. Givens: AP M/L m = 590.637 kPa/m meen Answers: ( 1 ) 59.369 Pa/m ( 2 ) 73.83 Pa/m (3) 95.443 Pa/m ( 4 ) 44.444 Pa/m *******arrow_forwardFind the reaction force in y if Ain = 0.169 m^2, Aout = 0.143 m^2, p_in = 0.552 atm, Q = 0.367 m^3/s, α = 31.72 degrees. The pipe is flat on the ground so do not factor in weight of the pipe and fluid.arrow_forward
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