Engineering Answers

A single phase overhead transmission line delivers 1100kW at 33kV at 0.8 pf lagging. The total resistance and inductive of the line are 10ohm and 15ohm respectively. Determine : (I) sending and voltages, Vs. (II) sending end power factor. (III) transmission efficiency.

Solve the following Problems. Situation 1 A 370-mm wide plank is cut in such a way that the width is in the tangential direction of annual rings. Compute the change in width as the moisture content changes from 18% to 42%. (The fiber saturation point is 35%, and it shrinks 8.21% in drying from FSP to oven dry in the tangential direction.) 

Solve the following Problems. Situation 1 A timber beam having a simple span of 4m carries a total load including its own weight of 15kN/m. It has a trapezoidal section having width of 250 mm at the top and 200 mm at the bottom and a depth of 360 mm, dressed dimension is used by reducing its dimensions by 15 mm. The wooden section is made up of 80% grade Apitong with the properties as follows: fb = 16.5 MPa fv = 1.75 MPa Compute the following: a. Maximum flexural stress b. Maximum shear stress

The shaft of a steam turbine produces 600 Nm torque at 50rev/s. Calculate the work transfer rate from the steam

Prove that the full width–half maximum (FWHM), is

FWHM = 2𝜎√2ln 2

FWHM = 2𝜎√2ln 2

(v) Compare the theoretical and the experimental results of FWHM. (5)

(vi) What are the theoretical and experimental values of 𝒚 at FWHM? (5)