Question

Question A1. Explain how many significant figures you should use for mechanical design calculations and why. Question A2 Provide two reasons why engineers use preferred sizes. Question A3. Sketch a helical tension spring and identify the locations for checking of stresses.

Answer 1

Al. Usually, three or four significant figures are necessary for engineering accuracy. As number of significant figures increase, any а A2. Engineers the measurement is more certain so, the precision of meas urement increases with significant figures. We should never report a number of significant figures of calculation greater than the smallest number of significant figures of the numbers used for calculation. uses preferred sizes in is it increases the probability of compatibility between objects which designed by different people at different times. 11) They help to minimize the number different sizes that needs to be manufactured . They are chosen such that these different sizes would lie equally spaced on logarithmic spaced. are of scale,

You must be knowing HomeworkLib guidelines to solve first question. Yet I solved second question as well.