Welding: Principles and Applications (MindTap Course List)
8th Edition
ISBN: 9781305494695
Author: Larry Jeffus
Publisher: Cengage Learning
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Textbook Question
Chapter 7, Problem 38R
What is hard slag?
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An 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 (19): Given the value of Qp [m³/s], and assuming Reynolds number similitude between the water main
and experimental tube, calculate the flow rate in the model tube (Qm) in [lit/s].
= 30.015 m^3/s
Problem 11: The lamp has a weight of 15 lb and is supported by the six cords connected
together as shown. Determine the tension in each cord and the angle 0 for equilibrium.
Cord BC is horizontal.
E
30°
B
60°
A
Problem 10: If the bucket weighs 50 lb, determine
the tension developed in each of the wires.
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Chapter 7 Solutions
Welding: Principles and Applications (MindTap Course List)
Ch. 7 - Using Table 7-1, list the six different fuel gases...Ch. 7 - What metals can be cut with the oxyfuel gas...Ch. 7 - What other term is used to refer to the OFC...Ch. 7 - What is a combination welding and cutting torch?Ch. 7 - State one advantage of owning a combination...Ch. 7 - State one advantage of owning a dedicated cutting...Ch. 7 - What is a mixing chamber? Where is it located?Ch. 7 - Define the term equal-pressure torch. How does it...Ch. 7 - How does an injector-type mixing chamber work?Ch. 7 - State the advantages of having two oxygen...
Ch. 7 - Why are some copper alloy cutting tips...Ch. 7 - Using Table 7-4, answer the following: a . Oxygen...Ch. 7 - What determines the amount of preheat flame...Ch. 7 - What can happen if acetylene is used on a tip...Ch. 7 - Why are some propane and natural gas tips made...Ch. 7 - What types of tip seals are used with cutting...Ch. 7 - If a cutting tip sticks in the cutting head, how...Ch. 7 - How can cutting torch tip seals be repaired?Ch. 7 - What is used to reduce the high cylinder or system...Ch. 7 - What do the two pressure gauges on a regulator...Ch. 7 - Why must the gas pressure be released and the...Ch. 7 - What should be done if the torch flashes back?Ch. 7 - What is the purpose of a reverse flow valve?Ch. 7 - Why must the reverse flow valve and the flashback...Ch. 7 - How can a hose be checked for leaks?Ch. 7 - Why is the oxygen valve turned on before starting...Ch. 7 - Why does the preheat flame become slightly...Ch. 7 - What causes the tiny ripples in a hand cut?Ch. 7 - Why is a slight forward torch angle helpful for...Ch. 7 - Why should cans, drums, tanks, or other sealed...Ch. 7 - Why is the torch tip raised as the cutting lever...Ch. 7 - Why are the preheat holes not aligned in the kerf...Ch. 7 - Sketch the proper end shape of a soapstone that is...Ch. 7 - What are two methods you can use to determine what...Ch. 7 - What is the best way to set the oxygen pressure...Ch. 7 - Why is it important to have extra ventilation...Ch. 7 - What factors regarding a cut can be read from the...Ch. 7 - What is hard slag?Ch. 7 - Why is it important to make good-quality cuts?Ch. 7 - When using an ordinary welding table, what can be...Ch. 7 - Describe the methods of controlling distortion...Ch. 7 - List three things that can become a problem when...Ch. 7 - How does cutting small-diameter pipe differ from...
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- Problem 3: Four-Force Equilibrium Knowing the forces in members A and C, determine the force of B and D, assuming the system is in equilibrium. A structural joint is held in equilibrium by four forces acting along different members. • Member A applies a force of 4 kN at an angle of 60° above the positive x-axis. • Member C applies a force of 2 kN horizontally to the left along the x-axis. • Member B applies an unknown force along the horizontal direction. • Member D applies an unknown force at an angle of 45° above the negative x-axis. Determine the forces in members B and D, assuming the system is in static equilibrium. 4 kN 2 kN C 45° A D 60° FB Barrow_forwardProblem 18: Determine the force in each member of the truss. State if the members are in tension or compression. 3 ft 3 ft 3 ft B D 4 ft 4 ft. 130 lb Earrow_forwardProblem 16: Determine the force in each of the member of the truss and state if the members are in tension or compression. Set P₁ = 10 kN, P2 = 8 kN. 2 m G F E A A 1 m B 2 m 1 m P1 Darrow_forward
- Problem 7: Determine the force in each cord for equilibrium of the 60-kg bucket. D E 4 m 4 m B 3 m- 3 m- 3 m.arrow_forwardProblem 15: Determine the reactions at the pin A and the tension in cord BC. Set F = 40 kN. Neglect the thickness of the beam. 26 kN F 13 12 -2 m 4 m B 4arrow_forwardProblem 21: Determine the force in members EF, CF, and BC and state if the members are in tension or compression. 1.5 m 4 kN E D 8 kN B 2 m 2 marrow_forward
- Problem 8: If the cords suspend the two buckets in the equilibrium position, determine the weight of bucket B. Bucket A has a weight of 60 lb. E 65° C 20° 40° F B 20° Aarrow_forwardProblem 4: Four Force Equilibrium The members of a truss are connected at joint O. Determine the magnitudes of F₁ and F2 for equilibrium, assuming 0 = 60°. 5 kN 7 kN 70° 30°arrow_forwardProblem 17: Determine the force in each member of the truss and state if the members are in tension or compression. Set P₁ = 9 kN, P2 = 15 kN. P₁ 3 m B P2 3m- D 4 marrow_forward
- Problem (11): A pipe discharges an unknown fluid into the atmosphere from a tank of depth (h) through a pipe of length (L), and diameter (d). Given the values of L [m], d [cm], and (h) [cm], calculate the discharge rate (Q) [lit/s] that would maintain Laminar flow in the pipe with a Reynolds number of Re=1500. Ignore minor losses. h darrow_forwardProblem 6: Two-Force Equilibrium Determine the angle 0 for connecting member B to the plate so that the resultant angle of FA and FB is directed along the positive x axis. What is the magnitude of the resultant force? -30° FA = 400 lb B x FB = 500 lbarrow_forwardStaticsarrow_forward
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