Engineering Answers

4. Convert the following azimuths to equivalent bearings.

a. AZIMs of Line CD = 270°00’

b. AZIMn of Line DE = 228°15’

c. AZIMs of Line EF = 135°00’

5. A field is in the form of a regular pentagon. If the true bearing of side AB is N 30°30’E, determine the true azimuth from south of the following sides of the field: AB, BC, and CD. Assume that the corners of the field are labeled in a clockwise direction.

a. Determine the interior Angles.

b. Determine the true bearing and true azimuth of Side AB.

c. Determine the true bearing and true azimuth of Side BC.

d. Determine the true bearing and true azimuth of Side CD.

1. Compute the angles EOF and GOH from the following set of lines whose magnetic bearings

are given:

a. OE, S 15°14’ E and OF, S 36°00’ W

b. OG, N 70°15’ W and OH, S 52°05’ W

2. Compute the angle EPF from the following set of lines whose azimuths are given. AZIMn of Line PE = 219°02’ ; AZIMs of Line PF = 154°16’

3. Convert the following bearings to equivalent azimuths.

a. AB, S 50°10’ E

b. CD, S 45°50’ W

c. EF, N 66°30’ W

When doing a PLC project, there are 5 steps that are typically followed. Please list and describe these steps in your own words.

Using the PLC comparison table compare PLC’s from 2 different manufactures in term of support for IEC- 61131, communication protocols and redundancy. Try to explain what the advantage and disadvantage of the support would mean to you as an end consumer

A 120Vrms 60Hz source supplies four loads connected in parallel as shown

below

Load 1: 150 kVA, at 0.8 pf leading

Load 2: 100 kVA, at unity pf

Load 3: 200 kVA, at 0.6pf lagging

Load 4: 80kW and 95kVAR (inductive)

Find

a) Power Factor

b) Calculate the value of capacitance/inductance connected in parallel

that will raise the power factor to unity

The airbag igniter is modeled by the following circuit. Determine the time it

takes the voltage across the igniter to reach its first peak after switching

from A to B 𝑅 =3Ω,𝐶 = 1

30𝐹 and 𝐿=60𝑚𝐻

A 150mm-diameter hollow sphere weighing 300 N is attached to a solid concrete block weighing 5.3 kN. If the concrete has a specific weight of 27.7 kN/m3, what will be the state of the two

 A 150mm-diameter hollow sphere weighing 300 N is attached to a solid concrete block weighing 5.3 kN. If the concrete has a specific weight of 27.7 kN/m³, what will be the state of the two objects together in water?      

The water in an 8-m-diameter, 3-m-high above-ground swimming pool is to be emptied by unplugging a 3-cm-diameter, 25-m-long horizontal pipe attached to the bottom of the pool. Determine the maximum discharge rate of water through the pipe. Also, explain why the actual flow rate will be less.

Q1- Consider a continuous time signal x(t)=2cos(21πt+30)+5cos(18 πt)

a) What is the signal frequency and What is the Nyquist rate of the signal?

b) Write a MATLAB M function or a script called sampley4p1 to perform

sampling:

1- Compare the results when the sampling frequencies of 10Hz , and 30 Hz were

used for the time between zero and 0.2sec?

2- determine the sampling frequency which result in the problem of aliasing .2-

Q2- a) suppose that the resulting samples from the Q1 (part a) passed through a 4

bits A/D convertor,

write a MATLAB code to perform the quantization, your MATLAB code and the

report should result in a figure contain the samples and the quantized values in the

same figure for comparison.

Students Tasks for the project1

6

Note: The project materials will be completed at the end of

lecture 4 after interdicting the interpolation technique