Delivery challan and Ewaybill

 Dear experts,

we are paper manufacturers and we used to prepare delivery challan for sending machine tools, drilling and grinding machines for repair, sharpening etc.

my query is

a) is it require to show GST rate and amount in the delivery challan and Ewaybill ?

b) what is to be select in the E-way bill.. job work return or others ?

kindly explain.
thanks in advance.