Challenging Engineering Problems with Detailed Answers

(a) Suppose that you are an EMC test engineer working in a company producing DVD players. The company's Research and Development (R&D) department has come up with a new player design, which must be marketed to the USA in 3 months. Your primary responsibility is to ensure that the product passes all the EMC tests within the stipulated time frame. (i) (ii) Describe all the EMC tests that should be conducted on the DVD player. (4 marks) If it was found that the Switched-mode Power Supply (SMPS) radiated emission exceeds the permitted limit at 50 MHz. Recommend two (2) EMC best practices in the design of the SMPS circuit to overcome this situation
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a) HOLD state occurs in JK flip flop when J...... ..0.. and K-.. b) PS and CLR inputs are. Asyncron..... input. c) When Enable control is low, there is... aa..cho in the output. change d) SET state means Q-1 Q-2. Simplify the below given Boolean equation by K-map method and then draw the circuit for minimized equation. YAB+AB.C + A.B
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need help with the following:for a Garage Door. pleaseSystem overview and Functional diagram, Flowcharts and State diagrams
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Consumption Function Is C = 100 + 0.8Y. A. What Is The Value Of Expenditure Multiplier? B. What Does Y Stand For In The Above Consumption Function? A. Multiplier= 5 B. GDP A. Multiplier= 4 B. GDP A. Multiplier= 3 B. GDP A. Multiplier= 5 B. SavingIn an economy, the consumption function is C = 100 + 0.8Y.a. What is the value of expenditure multiplier?b. What does Y stand for in the above consumption function?a. Multiplier= 5b. GDPa. Multiplier= 4b. GDPa. Multiplier= 3b. GDPa. Multiplier= 5b. saving
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What is the result of the division of two phasors: (10
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a) Define a hazard.b) Define a risk.c) How is risk calculated by formula?d) Describe how hazard and risks are related?
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a)What is the risk appetite of an entity? Give two appropriate examples to illustrate how what is acceptable, varies under different circumstances.b) Explain if risk can be eliminated / taken to zero? If not, why not and what do we call the remaining risk?
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Search online on how to run three-phase generators in parallel and emphasize the technical requirements in doing so. Make a microsoft powerpoint presentation about it. As much as possible, include illustrative diagrams.
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3. Decribe the function of the following standard organisation. a. IEC b. OJEU c. CENELEC d. British Standard (BS)
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You are an Associate Professional working in the Faculty of Engineering and a newly appointed technician in the Mechanical Workshop asks you to help him with a task he was given. The department recently purchased a new 3-phase lathe, and he is required to wire the power supply. The nameplate of the motor on the lathe indicated that it is delta connected with an equivalent impedance of (5+j15) per phase. The workshop has a balanced star connected supply and you measured the voltage in phase A to be 230 0 V. (a) Discuss three (3) advantage of using a three phase supply as opposed to a single phase supply (6 marks) (b) Draw a diagram showing a star-connected source supplying a delta-connected load. Show clearly labelled phase voltages, line voltages, phase currents and line currents. (6 marks) (c) If this balanced, star-connected source is connected to the delta-connected load, calculate: i) The phase voltages of the load (4 marks) ii) The phase currents in the load (4 marks) iii) The line currents (3 marks) iv) The total apparent power supplied
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Given the goals and objectives of intro to projects course in understanding and helping to develop and overcome design issues and challenges (such as system level specifications, modeling, high level synthesis and validation, innovation, ethical considerations, hardware/software constrains, security considerations etc.) how did the presentation of the CEO of LooUQ helped you in your intro to projects course? What did you like the most?
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An ECM involving the installation of high efficiency light fixtures without changing lighting period. In order to compute savings, the operating hours of the light are estimated. The lighting power draw during the baseline is obtained from the old light fixtures' manufacturing data sheets. On the other hand, the lighting power draw during the reporting period is measured by metering the lighting circuit. Energy savings are calculated by subtracting the post retrofit power draw from baseline power draw and then multiplied by estimated operating hours. Which M&V option best describe these?
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The midterm report The mid-term assignment requires you to write a 500- word course report on the development status of distribution automation in a particular city or region of your home country. The following three parts are required. 1. The introduction -100 words Introduce the background of the city, population, electricity demand, etc. 2. Body part -250 words Investigate the development of distribution automation in corresponding cities and analyze the local distribution automation level. 3. Future development -150 words Summarize the defects of of local distribution automation development and put forward the future improvement plan.
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A product has demand of 4,000 units per year. Ordering cost is $20 and holding cost is $4 per unit per year. The cost-minimizing solution for this product is to order all 4,000 units at one time 200 units per order 1000 units per order O400 units per order A PERT activity has an optimistic time of 3 days, pessimistic time of 15 days and an expected time of 7 days. The most likely time of the activity is 9 days 6 days 7 days 8 days
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Generate a chirp function. For generated signal;A. Calculate FFTB. Calculate STFTC. Calculate CWT2. Generate a chirp function. For generated signal; A. Calculate FFT B. Calculate STFT C. Calculate CWT|
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What are the three actions when out-of-profile packets arereceived in DiffServ? How do these actions affect theout-of-profile packets accordingly?
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a) Define the notion of an IEC functional safety system and mention how it co-exists with the BPCS.b) Give two examples of commercial (in public buildings / facilities) functional (active) safety systems (that does not necessarily exactly follow the IEC standards but are still in essence functional safety systems), explaining how its intended function brings safety to ordinary people.c) List four other kinds of safety systems or safety interventions apart from a functional safety system.
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Grid analysis for smart waste management system that focus on a single bin pickup then separate waste bin pick upAlso include factors like cost, maintenance, skills requirementsAnalysis of alternative solutionsTry to come up with at least three solutions. These need not to involve three totally different energy sources. You could also have, say, three different types of wind systems.At this stage no detailed design is necessary.Try to describe basic concept as best you can, but don't make a decision as yet.This is one part of project where brainstorming is VERY importantOnce the alternatives are identified you need to do at least a grid analysis. Some groups augment that with other techniques, such as 'force field analysis' or as SWOT analysis.For a grid analysis, use atleast four (weighted) selection criteria
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PERT (Program Evaluation and Review Technique) is used to - assist the manager in scheduling the activities assist in project scheduling similar to CPM none of the above assist the manager to know when should each activity start From the given table of a project the critical path, the project duration and the free float for activity A are respectively ABCD E Activity precedence A AB,C DE Durations (weeks) 16 20 8 10 6 12 OA-C-E-F,50 weeks, and 0 week B-E-F,38 weeks, and 0 week OA-D-F,38 weeks, and 2 weeks OA-C-E-F,42 weeks, and 0 week
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Solar implementation in Pakistan model and report including costanalysis
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2. What is the nominal interest rate if the effective rate is 13% and the interest is paid four times a year?
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A company is evaluating two options of buying delivery truck. Truck A has initial after 3 years will be $7000. Truck B has initial cost of $37,000, an operating cost of $5200, and a resale value of $12,000 after 4 years. At an interest rate of 10% which model should be chosen?
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w 3. Bank A pays 16% interest once a year, while bank B pays 15% interest once a month, assuming the same deposit time, which bank has a higher interest rate?
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Gigi is planning to pursue her dream to be a successful human resource manager working for multinational company and she wants to do her full-time degree in Malaysia. You as a cousin, needs to assist Gigi to shortlist at least 4 institutions of higher learning (IHLs) which is offering human resource related degree programs. List down all the assumptions/values/methods and references used to solve the following questions. a. Identify the key variables such as duration, tuition fees, ranking of the IHL, starting pay of the fresh graduate etc for the shortlisting of the IHLs and tabulated it into a table. (7 marks) b. Show how you can apply the statistical toolpak and probability toolpak in EXCEL for the data analysis and draw meaningful conclusions based on the data that you have collected in part (a). You need to compare the EXCEL result with manual calculation. Refer to your own significant findings, suggest to Gigi which IHL is most suitable for her and justify your suggestion. Appendix A (Fill up the empty column) No Brand 1 A 2 A 3 A 4 A 5 A 6 A 7 A A A A B B B B 8 B 8 B B B C C C C C C C C D D 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 59 60 D D D D D D D D Sugar content (g/100g) 13.5 14.7 15.7 18.0 22.5 24.2 17.0 14.0 15.0 19.0 15.2 15.5 17.8 17.0 18.0 25.0 21.2 23.4 22.0 16.0 15.0 16.0 18.0 19.0 26.5 21.5 22.5 14.0 25.0 16.5 19.0 14.5 15.5 16.8 17.5 19.5 20.5 22.0 22.5 23.0 Question 1: Ginny is working as a chemist for a food manufacturing company. She is tasked to perform a sugar content analysis on the 4 types of company products - biscuit brand A, B, C and D. She has completed the sugar content analysis in the 60 biscuits (15 for each brand) and tabulated in Table Q1 as shown in Appendix A. List down all methods/assumptions/values used to solve the following questions. a. Complete the Table Q1 which consists of 60 biscuits details and use EXCEL to draw a graph for sugar content comparison in 4 different brands and draw conclusion b. Refer to part (a) Table Q1, use EXCEL to calculate the average sugar content and standard deviation for the brand A biscuit. If the sugar contents are normally distributed, calculate the probability that a randomly selected brand A biscuit will have sugar content smaller than 19g/100g. Repeat the same calculation for brand B. Compare the answers with manual calculation and draw conclusions. c. Refer to part (a) Table Q1, the company has decided to reject any biscuit with sugar content greater than 20g/100g. Use EXCEL to calculate the probability that a randomly selected 30 biscuits will have the following: (i) Exactly 18 good biscuits. (ii) At least 20 good biscuits. Compare the answer(s) with manual calculation and draw conclusion(s).
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