It has been found that of the steel bars produced by a certain manufacturer, 0.5% aredefective.(a)From a sample of 250 steel bars produced by the manufacturer,what is the probability that at least 3 are defective?[7 marks](b)From a sample of 200 steel bars produced by the manufacturer,3 were found to be defective. Can you infer that the manufacturingprocess is operating normally?[8 marks]

Part (a)This problem involves a binomial distribution, where:n (number of trials) = 250 steel barsp…

Answered: It has been found that of the steel…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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10) Table 1 and Table 2 list the general properties and the production alternatives for various pozzolans. |Table 1 Chemical Composition SiO2, % B D 35 93 35 50 A½O3, % Fe3O2, % Саб, % Physical Property Blaine fineness, m²/kg Color 20 0.4 12 25 0.4 10 25 1.6 40 5 430 Gray 19,000 Gray 400 White 390 Gray Production Method a byproduct of producing silicon metal or ferrosilicon alloys 2 Table 2 a by-product in coal fired power stations formed when molten iron blast furnace slag is rapidly chilled (quenched) by immersion in water A dehydroxylated form of the clay mineral kaolinite 3 For the four pozzolans given in the first column of Table 3, fill the remaining columns with the corresponding letters and numbers: • Column 2 - Determine which one is which pozzolan (from Table 1): (A/B/C/D) • Column 3 - Identify the natural and artificial pozzolans: (N/A) • Column 4 - Determine which ones are self-cementing. Column 5 - Determine the production method (from Table 2): (1/2/3/4) Table 3…
Alcoa Corporation (from Aluminum Company of America) is an American industrial corporation. It is the world's sixth largest producer of aluminum, with corporate headquarters in Pittsburgh, Pennsylvania. Alcoa is a major producer of primary aluminum, fabricated aluminum, and alumina combined, through its active and growing participation in all major aspects of the industry: technology, mining, refining, smelting, fabricating, and recycling. In a casting R&D trial of a certain aluminum alloy which performed in Alcoa Co, Ltd., by using a particular sand mold, it took 5 mins for a rectangular-prism shaped casting part (length=6 in, width=8 in, height=10 in) to solidify. Calculate the minimum solidification time of the cylindrical riser so that the riser will be effective by using Chvorinov's Rule. Use the following table for the dimensions of the cylindrical-shaped riser. diameter=10 in height= 8 in n (constant) = 2
ngineering / Civil Engineering / Q&A Library/1 a. a. During a tensile test on a speci... 1 a. During a tensile test on a specimen the following results were obtaineo Load (kN) 15 30 40 50 55 60 Extension 1.03 2.00 2.73 3.42 3.80 4.10 (mm) Diameter at fracture -16.5mm Diameter of gauge length =19mm Gauge length = 150mm Load at fracture - R0KN Gauge length at fracture = 170mm Ultimate load-120kN Plot the load/extension graph to an appropriate scale. Hence determine the i. Modulus of elasticity ii. Percentage elongation iii. Percentage reduction in area iv. The nominal stress at fracture
Describe the main difference between the plots for the specimens tested
Measurements should be reported to the nearest 1000, 100, 10, 1, 0.1, 0.01, 0.001 units, etc., depending on their variability and intended use. Using your best judgment, how should the following measurements be reported? Deformation of a steel specimen during the tension test (in.) Tensile strength of steel (psi) Modulus of elasticity of aluminum (MPa) Weight of aggregate in a sieve analysis test (grams) Compressive strength of portland cement concrete (psi) Moisture content in a concrete masonry unit (percent) Asphalt content in hot-mix asphalt (percent) Specific gravity of wood Distance between New York City and Los Angeles (miles) Dimensions of a computer microchip (mm)
You have been asked to obtain an object/structure/component that has failed (It may come fromyour home, workshop, an automobile repair shop, a machine shop, and so on) and investigate to:1. Determine the cause and type of failure (i.e., simple fracture, fatigue, creep).2. What are the working and environmental conditions that causes the failure?3. Propose measures that can be taken to prevent future incidents of this type of failure.4. After you have determined the failure type of your case study, your leader asked you to writeshortly about the other mechanisms of failures.
I need answer within 20 minutes please please with my best wishes
A steel block of size 300 mm X 150 mm X 100 mm subjected to load of 300 kN (tension) on 150 mm X 100 mm face, 500 kN (compression) on 300 mm X 150 mm face and 100 kN (tension) on 300 mm X 100 mm face. Determine change in volume if poisons ratio is 0.25, E = 2 X 10^5 MPa
A brief description of each major testing machine. This should include appropriate factor necessary to convert from the calibration units to SI. (Construction Materials and Testing)
(B) Prove the following relations: e-wGs 1) S= 1+e Gs+s.e 2) Yt=¯ Yw 1+e A SaturatodiSam Q2
Please solve in 15 min
What would be the yield if 950 tons of aluminum were rolled from 1,000 tons of ingot? If yield is less than 100%, what possible explanations could account for that?

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