What is the difference between schedule 40 and schedule 80 iron pipe?
A) Schedule 40 has a heavier wall than schedule 80.
B) Schedule 80 is easier to bend than schedule 40.
C) Schedule 80 has a heavier wall than schedule 40.
D) They have a different metallurgical composition.
C
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Design a problem, complete with a solution, to help students to better understand Ohm’s Law. Use at least two resistors and one voltage source. Hint, you could use both resistors at once or one at a time, it is up to you. Be creative.
Although there is no correct way to work this problem, this is an example based on the same kind of problem asked in the third edition.
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Technician A says that a discharged battery (lower-than-normal battery voltage) can cause slow cranking. Technician B says that dirty (corroded) battery cables can cause slow cranking. Which technician is correct?
A) Technician A only B) Technician B only C) Both Technicians A and B D) Neither Technician A nor B
These windows can be 100-percent operable and are best used where extreme weather conditions require a tight seal when the window is closed, although these windows are in common use everywhere:
A. casement B. double hung C. sliding D. awning E. none of the above
Problem 1.28 Two identical linkage-and-hydraulic-cylinder systems control the position of the forks of a fork-lift truck. The load supported by the one system shown is 1500 lb. Knowing that the thickness of member BD is 5/8 in., determine (a) the average shearing stress in the 1/2-in.-diameter pin at B, (b) the bearing stress at B in member BD.
