Mechanical Engineering Answers

A solid and a hollow shaft, connected by a coupling, transmit power. The

outside diameters of the shafts are the same and the inside diameter of the

hollow shaft is 75 % of its outside diameter. The solid shaft is three times as

long as the hollow shaft. Take the modulus of rigidity for both shafts as 80

GPa.

(a) If the angle of twist for the solid shaft is 1°, find the angle of twist for the

hollow shaft.

(b) If the maximum shear stress in the solid shaft is 30 MPa, find the maxi-

mum stress in the hollow shaft.

Draw the isometric view of a regular cylinder of diameter 80 and height 70

Develop the lateral surface of regular hexagonal prism of base edge 35 and height 60.

Draw the isometric view of a regular hexagonal prism of base edge 35 and height 60.

Draw the isometric view of a regular cylinder of diameter 80 and height 70

A 400 kVA transformer has a primary winding resistance of 0.5and a secondary winding resistance of 0.001. The iron loss is 2.5 kW and the primary and secondary voltages are 5 kV and 320V, respectively. If the power factor of the load is 0.85, determine the efficiency of the transformer on full load.

A ball is thrown so that it may just clear a wall 3.6 m high and at a distance of 4.8 m from the wall. The ball was found to hit the ground at a distance of 3.6 m on the other side of the wall. Find the least velocity with which the ball can be thrown.

16.) Find the dew point temperature of air whose humidity ratio is 0.0150 kg water/kg dry air. (PLEASE GIVE THE CORRECT ANSWER WITH FORMULA/SOLUTION)

Air in a conditioned space has 26 oC db and 70% RH, find the wet bulb depression. Please give me the correct answer with formula/solution.

find that at what distance body A will attain a velocity of 3 m/s. when starts from rest. Assume coefficient. of friction as 0.2 for block and surface and pulleys are frictionless and weightless.