General purpose acme threads: a. bear at the flanks b. bear at the major diameter c. have the same clearance at the root and the flank d. generally have very poor finishes so fits are not important

A)-in the process of engineering design, explain the contribution of material selection. b)- explain the procedure of synthesis as is employed in engineering design. c)- is there any relationship between ergonomics and engineering design? explain. d)- safety consideration in engineering design includes human, product and the enviroment . explain how safety will be incorporated into the design?