A) What is the relation between stress at the tension side and diameter of the fatigue test specimen?
b) What is the unit of the endurance limit?
c) How can the endurance limit for a fatigue analysis be calculated when real material
properties are not available?
d) Why some of the materials perform endurance limit, and some don’t? Give some examples
from each group of material and discuss the reason.

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.

Calculate the bore of a cylinder that has a stroke of 18 inches and an extension time of 6 seconds at a flow rate of 4 gal/min.

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.