Engineering Exam: Electrical Engineering - Computer Applications, Exams of Computer Applications

Download Engineering Exam: Electrical Engineering - Computer Applications and more Exams Computer Applications in PDF only on Docsity! Cork Institute of Technology Bachelor of Engineering in Electrical Engineering - Award (NFQ Level 7) Summer 2006 Computer Applications (Time: 3 Hours) Answer THREE questions from Section A and TWO questions from Section B. For questions 1, 2, 3, 4, 6 and 7 use the computer. For question 5 , use an answer book. Use different answer books for each section. Examiners: Mr. M. Hennessy Prof. E. McQuade Mr. D. A. Collins Mr. P. Fenton Section A Q1. (a) Figure 1(a) shows the hardware configuration for an industrial controller. Using the software package PL7 Pro®, create a new application called “Monitor” and configure the hardware as shown in the figure. [4 marks] (b) Figure 1(b) is a program for the controller referred to in (a), written in ladder language. Using PL7 Pro® software, recreate the program in structured text language. [16 marks] Q2. (a) In a three phase controlled rectifier fitted with a freewheel diode, the expression for the mean output voltage is given by… For α < 60°, Ud = 1.35 .U cos α For 60° < α < 120°, Ud = 1.35 .U cos (60° + α) + 1 where the U is the RMS input line voltage and α is the firing angle. In an Excel® file called “Freewheel.xls”, create a table similar to Figure 2(a) and enter one formula in cell B3 to calculate the theoretical mean output voltage. Fill the same formula down to cell B15. [9 marks] (b) Use the file to automatically chart the output voltage versus firing angle. The X–axis is to be titled “Firing angle [degree]”; it is to have a minimum of 0º, a maximum of 120º and major units of 10º. The Y–axis is to be titled “Mean output voltage [V]”; it is to have a minimum value of 0, a maximum of 600 and major units of 50. [6 marks] 2 (c) Figure 2(a) column C shows measured values obtained in a laboratory experiment. Enter these values in your file and amend the chart to show the measured values as markers. The desired effect is shown in Figure 2(b). [5 marks] Q3. (a) Figure 3(a) shows a network diagram for a construction project. Create a new Microsoft Project® file called ‘Generator’ and enter the tasks, durations and configure the links to match the network diagram. Include two milestones, one for Start and one for End. There is a lag following on these tasks… Plinths 3 days Order generator 15 days Order switchgear 10 days [8 marks] (b) Use the program to calculate the overall project duration and to highlight the critical path in patterned red task bars. Write the project duration in your answer book.[5 marks] (c) Use the program to calculate the total project cost and write this cost in your answer book. The fixed charges for each task are listed in Figure 3(b). Assume an average labour rate of €60 per hour, a charge of €60 per use, an 8 hour working day and unlimited resources. [7 marks] Q4. (a) Figure 4(a) shows the content of a promotional leaflet being sent to customers of an automation company. Recreate the basic content of the leaflet using Microsoft Word®; the file is to be called “Flyer.doc”. The document is formatted for an A4 sheet, with a left margin of 3 cm, a right margin of 3 cm and top and bottom margins of 2.5 cm. The default tabs are set to 1 cm. The main text is formatted in 11-point Arial and each paragraph has 12-points clear space before it. [8 marks] (b) The file is to be sent to the customers listed in Figure 4(b). Configure the document for multiple recipients using the Mail Merge facility. [12 marks] Enter Player Name here Form 1 6 <Title> <First_name> <Last_name>, <Address1>, <Address2>, <Address3>. Dear <First_name>, Savy cordially invites you to an exhibition of its ground breaking automation technology. The details of the time, date and venue are listed below. We guarantee that you’ll be impressed by our latest innovation, and we know its going to save you money. We look forward to seeing you there! Yours truly, ......................................................................... Jonathan Doe, Commercial Director Time 12:00 to 17:00 Date 12 June 2006 Venue Exhibition Centre, CIT, Cork Figure 4(a) Recipients Title First_name Last_name Address1 Address2 Address3 Mr. John Murphy Westwood Carrigaline Co. Cork Ms. Jennifer Lynch Temple Cables Ovens Co. Cork Mr. Alan Somers Bauxite Ltd Douglas Road, Cork. Figure 4(b) Controller %L1 — (*Counter setting’) configuration lt A operate —— %CO.P=6 § 1.2 OPERATE i LA j}-—_—__________|coPeo | | W113 OPERATE Jf fn ——-} %C0.P=12 TSX 3721 v3.3 | TSX DMZ 28DR ~ Empty slots %L2 Counting’) “610 %CO MO \ | R E ( }4 Figure 1 (a OP 12 9 @) %Q2.4 fo BH Mop:¥ BMA %COD | %M 4 cu eR a %L3_—_ ("Count monitoring’) %M50 %TMO ehh 2 Vi mo} C) MODE: TON )TB: 1s. | TMP: 2 Figure 1 (b) MoD %HtASO COMPARE: M3 /--[_xcove2z _ }-—-——- ) a Figure 3 (a) / / Prarning | 4 Order swtengear Bi ssh or Ys Wire sx room sian (i) Feeney Sueno ay 8 (Hest Task name Fixed cost Task name Fixed cost Planning €500 HV cable €4500 Order switchgear €25000 Tower €55000 Order generator €80000 Wire switch room — €12000 Plinths €5000 Commission €2500 Build switch room — €22000