$($ii$)$ Use Data Sheet BS $4500$A which can be obtained online $($Google$)$ where necessary

$1.$ Define the following terms and explain their importance in mechanical design;

a$)$ Tolerance

b$)$ Limits

c$)$ Fits

$2.$ Discuss how limits$,$ fits and tolerances affect the design of assemblies, manufacturability, cost, and functionality of machine elements

$3.$ Including neat sketches distinguish between the hole base system and shaft base system of tolerances.

$4.$ State the type of fit which was achieved in each of the following student's work in the workshop:

a$)$ Drilling or rough turning work resulted in a loose running or easy running assembly

b$)$ Grinding or careful reaming resulted in a press fit assembly

$5.$ Given a $\backslash (25\backslash$mathrm$\{$H$\}7/\backslash$mathrm$\{$f$\}7\backslash )$ fit system, determine the following:

a$)$ Hole Limits:..

b$)$ Shaft Limits:

c$)$ Type of fit:

$6.$ Write down the limits and tolerances by filling in the table provided. The table should be copied and then completed.