PROBLEM 2.7

A nylon thread is subjected to a 2-lb tension force. Knowing that E = 0.5 ? 106 psi and that the maximum allowable normal stress is 6 ksi, determine (a) the required diameter of the thread, (b) the corresponding percent increase in the length of the thread.


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Modern manufacturing processes and the use of automatic equipment _____ .

A. may result in minor differences in color and textures of the brick B. correct the color and texture differences that were problematic with previous processes C. make the need for a sample panel obsolete D. eliminate the need for using intense heat in the kilns

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What is the name of the device, either analog or digital, that measures the activities of invisible

electrons and provides a visual interpretation of these activities?

a. photoconductive cell c. potentiometer or pot b. rheostat d. electrical meter

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An example of a lever and mechanical advantage used on a vehicle is the ________

A) Fuel tank B) Battery C) Brake pedal D) Radio volume control

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The NAND logic function of a relay ladder circuit is performed by __________.

A. two or more N.O. push buttons connected in series B. two or more N.O. push buttons connected in parallel C. two or more N.C. push buttons connected in series D. two or more N.C. push buttons connected in parallel

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