(a) why are finishing operations necessary in manufacturing processes?
(b) explain how these factors:

(i) vibration,
(ii) excessive temperature,
(iii) load on grinding wheels,
(iv) wheel speed and workpiece feed rate can contribute to poor surface finish during abrasive machining.
(c) explain 3 consequences of allowing the temperature to rise during grinding?

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater