Materials for Civil and Construction Engineers (4th Edition)
4th Edition
ISBN: 9780134320533
Author: Michael S. Mamlouk, John P. Zaniewski
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 1, Problem 1.47QP
(a)
To determine
Find the mean, standard deviation and the coefficient of variation of the data.
(b)
To determine
To create a control chart for the given data in spreadsheet and provide comments.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
In a ready-mix plant, cylindrical samples are prepared and tested periodically to detect any mix problem and to ensure that the compressive strength is higher than the lower specification limit. The minimum target value was set at 27.6 MPa (4000 psi). The compressive strength data shown in Table were collected. Use one system of units only as specified by the instructor.a. Calculate the mean, standard deviation, and the coefficient of variation of the data.b. Using a spreadsheet program, create a control chart for these data showing the target value and the lower specification limit. Is the plant production meeting the specification requirement? If not, comment on possible reasons. Comment on the data scatter.
In a ready-mix plant, cylindrical samples are prepared and tested periodically to detect any mix problem and to ensure that the compressive strength is higher than the lower specification limit. The minimum target value was set at 5,000 psi. The compressive strength data shown in Table were collected. a. Calculate the mean, standard deviation, and the coefficient of variation of the data. b. Using a spreadsheet program, create a control chart for these data showing the lower specification limit. Is the plant production meeting the specification requirement? If not, comment on possible reasons. Comment on the data scatter.
1.40 In a ready-mix plant, cylindrical samples are prepared and tested periodically
to detect any mix problem and to ensure that the compressive strength is
higher than the lower specification limit. The minimum target value was set
at 5,000 psi. The following compressive strength data were collected.
Compressive
Strength (psi)
Compressive
Strength (psi)
Sample No.
Sample No.
1
5595
11
6695
2
5139
12
5449
6359
13
5278
4
5192
14
6697
5
5188
15
5195
6.
5241
16
6021
7
5964
17
5320
5875
18
5657
6155
19
6595
10
5115
20
5235
a. Calculate the mean, standard deviation, and the coefficient of variation
of the data.
b. Using a spreadsheet program, create a control chart for these data showing
the target value and the lower specification limit. Is the plant production
meeting the specification requirement? If not, comment on possible rea-
sons. Comment on the data scatter.
Chapter 1 Solutions
Materials for Civil and Construction Engineers (4th Edition)
Ch. 1 - State three examples of a static load application...Ch. 1 - A material has the stressstrain behavior shown in...Ch. 1 - A tensile load of 50.000 lb is applied to a metal...Ch. 1 - A tensile load of 190 kN is applied to a round...Ch. 1 - A cylinder with a 6.0 in. diameter and 12.0 in....Ch. 1 - A metal rod with 0.5 inch diameter is subjected to...Ch. 1 - A rectangular block of aluminum 30 mm 60 mm 90...Ch. 1 - A plastic cube with a 4 in. 4 in. 4 in. is...Ch. 1 - A material has a stressstrain relationship that...Ch. 1 - On a graph, show the stressstrain relationship...
Ch. 1 - The rectangular block shown in Figure P1.11 is...Ch. 1 - The rectangular metal block shown in Figure P1.11...Ch. 1 - A cylindrical rod with a length of 380 mm and a...Ch. 1 - A cylindrical rod with a radius of 0.3 in. and a...Ch. 1 - A cylindrical rod with a diameter of 15.24 mm and...Ch. 1 - The stressstrain relationship shown in Figure...Ch. 1 - A tension test performed on a metal specimen to...Ch. 1 - An alloy has a yield strength of 41 ksi, a tensile...Ch. 1 - Prob. 1.21QPCh. 1 - Figure P1.22 shows (i) elasticperfectly plastic...Ch. 1 - An elastoplastic material with strain hardening...Ch. 1 - A brace alloy rod having a cross sectional area of...Ch. 1 - A brass alloy rod having a cross sectional area of...Ch. 1 - A copper rod with a diameter of 19 mm, modulus of...Ch. 1 - A copper rod with a diameter of 0.5 in., modulus...Ch. 1 - Define the following material behavior and provide...Ch. 1 - An asphalt concrete cylindrical specimen with a...Ch. 1 - What are the differences between modulus of...Ch. 1 - Prob. 1.33QPCh. 1 - A metal rod having a diameter of 10 mm is...Ch. 1 - What is the factor of safety? On what basis is its...Ch. 1 - Prob. 1.36QPCh. 1 - Prob. 1.37QPCh. 1 - A steel rod, which is free to move, has a length...Ch. 1 - In Problem 1.38, if the rod is snugly fitted...Ch. 1 - A 4-m-long steel plate with a rectangular cross...Ch. 1 - Estimate the tensile strength required to prevent...Ch. 1 - Prob. 1.42QPCh. 1 - Briefly discuss the variability of construction...Ch. 1 - In order to evaluate the properties of a material,...Ch. 1 - A contractor claims that the mean compressive...Ch. 1 - A contractor claims that the mean compressive...Ch. 1 - Prob. 1.47QPCh. 1 - Prob. 1.48QPCh. 1 - Prob. 1.49QPCh. 1 - Briefly discuss the concept behind each of the...Ch. 1 - Referring to the dial gauge shown in Figure P1.51,...Ch. 1 - Repeat Problem 1.51 using the dial gauge shown in...Ch. 1 - Measurements should be reported to the nearest...Ch. 1 - During calibration of an LVDT, the data shown in...Ch. 1 - During calibration of an LVDT, the data shown in...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- In a ready-mix plant, cylindrical samples are prepared and tested periodically to detect any mix problem and to ensure that the compressive strength is higher than the lower specification limit. The minimum target value was set at 27.6 MPa. The compressive strength data shown in Table P7.48 were collected. Use one system of units only as specified by the instructor. a. Calculate the mean, standard deviation, and the coefficient of variation of the data.b. Using a spreadsheet program, create a control chart for these data showing the target value and the lower specification limit. Is the plant production meeting the specification requirement? If not, comment on possible reasons. Comment on the data scatter.arrow_forwardA Brinell test is performed on a steel using a 1.42 in. diameter indenter with a load of 67925 lbs. A 0.8 in. Determine in indentation was measured on the surface of the steel. Determine: a) HBN (psi); b) tensile strength (psi)arrow_forwardA1 Copy the sketch of the tensile stress-strain test (Figure A1) results for a waisted metallic specimen and indicate the locations representing maximum stress (A), ultimate strain to failure (B), and 0.2% proof (yield) stress (C), and calculate the Young's modulus of the material. Figure A1 300 250 200 150 100 50 0 Stress (MPa) 0.2 0.4 0.6 8.0 Strain (%) 10.0arrow_forward
- A tensile test was performed on a metal specimen with a diameter of 1⁄2 inch and a gage length (the length over which the elongation is measured) of 4 inches. The data were plotted on a load-displacement graph, P vs. ∆L. A best-fit line was drawn through the points, and the slope of the straight-line portion was calculated to be P y∆L 5 1392 kips yin. What is the modulus of elasticity?arrow_forward4. The following creep data were obtained for a metal alloy tested under a constant load and at a constant temperature (the initial length of the unloaded sample was 2.0 inches): Sample Length (in) Time (hr) 2.004 2.01 100 2.02 200 2.03 400 2.045 1000 2.075 2000 2.135 4000 2.193 6000 2.23 7000 2.30 8000 (fracture) a.) Plot the strain versus time (in hours) curve for this material. b.) Determine the steady-state creep rate.arrow_forwardA compact tension specimen is tested according to ASTM standard E399. The load displacement curve is shown in the Figure below with PQ= 120 kN (Type 1 curve). The specimen dimensions are B=0.5 cm, W=10 cm, and “a” =5 cm. If the materials yield stress is 600 MPa are the conditions correct for a valid K1C measurement? Please look up McEviley’s textbook on the thickness criterion for a valid fracture toughness value.arrow_forward
- 3. A new material is being developed and tested in the lab. The column was made using the new material and was loaded to a constant axial stress of 25 MPa. The deformation is monitored over time according to the following table. The deformation is measured over a length of 250 mm. First sketch strain-time curve and describe the model. Second, determine the elastic modulus and the viscose coefficient. Time (days) Stress (MPa) Deformation (mm) 25 0.6250 1 25 0.6281 25 0.6313 3. 25 0.6344 7 25 0.6469 28 25 0.7125 180 25 1.1875 365 25 1.7656arrow_forwardThe fineness modulus is a relative measure of how coarse or how fine an aggregate sample is. True Falsearrow_forwardA concrete cylinder sample has a diameter of 6 inches and a height of 12 inches. The maximum load carried by the sample after its failure is 500 KN. Determine the compressive strength of the sample in psi. (use 1lbf = 4.45 N, round-up your answer to the nearest whole number that is divisible by 5, no need for unit)arrow_forward
- With aid of diagram, elaborate on the method to test material hardness using Brinell hardness testarrow_forwardTwo 150 mm * 300 mm concrete cylinders with randomly oriented steelfiber contents of 0 and 2% by weight, respectively. After curing for 28 days,the specimens were subjected to increments of compressive loads until failure. The load versus deformation results were as shown in Table P7.45. Assuming that the gauge length is the whole specimen height, determine the following:a. The compressive stresses and strains for each specimen at each loadincrement.b. Plot stresses versus strains for the two specimens on one graph.c. The initial modulus of elasticity for each specimen.d. The ultimate strength for each specimen.e. The strain at failure for each specimen.f. Toughness. Curves may be approximated with a series of straight lines.g. Comment on the effect of adding fiber on the following:i. Modulus of elasticityii. Ultimate strengthiii. Ductilityiv. Toughnessarrow_forwardGenerally Ring and ball test is performed on which material ?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Steel Design (Activate Learning with these NEW ti...Civil EngineeringISBN:9781337094740Author:Segui, William T.Publisher:Cengage Learning
Steel Design (Activate Learning with these NEW ti...
Civil Engineering
ISBN:9781337094740
Author:Segui, William T.
Publisher:Cengage Learning