What should you keep in mind about the spacing and angle of section lines?
What will be an ideal response?
Section lines should be created in such a manner that they are easily recognizable as section lines. Section lines should be easily distinguishable from edges on the part. If the section line density is too low or if the angle of the section lines matches the angle of some of the edges of the part, there may be confusion between the section lines and the edges of the part. On the other hand, too dense a section line pattern is difficult to reproduce cleanly when the drawing is printed, copied, or transmitted.
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List five rules that should be adhered to when using abrasive discs.
What will be an ideal response?
Why are the fins in radiators and heater cores long and flat?
A) To increase surface area B) So more air can pass over to dissipate its heat C) Both A and B D) Neither A nor B
Why do many HVACR jobs now require a criminal background check?
A) To assess potential job applicant's mechanical abilities B) To protect the public from dangerous individuals C) To determine what your social security number and address are D) To look for a job applicant's high school grades
Common-grade stainless steels normally contain at least _____
a. 7 percent nickel b. 11 percent chromium c. 11 percent nickel d. 21 percent chromium