33rd BCS EEE Written Question ।। ৩৩তম বিসিএস ইইই লিখিত প্রশ্ন

৩৩তম বিসিএস ইইই লিখিত প্রশ্ন

কারিগরি/প্রফেশনাল ক্যাডারে যারা ইলেকট্রিক্যাল ও ইলেকট্রনিক ইঞ্জিনিয়ারিং বিভাগ থেকে আবেদন করবেন তাদের প্রস্তুতির জন্য বিগত বছরের প্রশ্ন গুলো প্রস্তুতির জন্য সহায়ক হবে।

ELECTRICAL ENGINEERING

SECOND PAPER

Subject Code: 892

Time allowed-3 hours

Full marks100

1. (a) Draw the single line diagram of power system in Bangladesh.

(b) Write the most recent electrical tariff in Bangladesh.

(d) List the steps involved in PCM for signal processing.

2. (a) Define per unit quantities in power system and explain its necessity.

(b) Explain Newton-Raphson method to analyse load flow of power system.

3. (a) What do you understand by swing equation and power angle? How are they related with power system stability?

(b) Describe briefly how electrical power is transmitted in Bangladesh and why different voltage levels are used in different locations.

4. (a) Explain in short the working principle of gas based combined cycle power plant.

(b) What are the factors that need to be considered for the construction of a power plant? Describe.

5. (a) Explain why distributed instead of Lumped parameters are considered in long transmission line.

(b) Discuss the relative merits and limitations between overhead and underground cables.

6. (a) Draw a typical layout of 33/11 KV substation.

(b) Describe the operation of a VCB.

7. (a) Write down the problems of 3-phase Y-Y connected transformers. How can these problems be removed?

(b) The rated capacity of a power plant is 100 MW. The average and maximum loads during a period was 90 MW and 98 MW respectively. Find the capacity factor and utilization factor of this plant.

8. (a) Define information, bit and entropy.

(b) Explain why variable length source coding is preferred over fixed-length coding.

9. (a) Define channel capacity and explain how to obtain the channel capacity.

(b) A source emits 3 symbols of probabilities: 0-35, 0-40 and 0.25. Find the binary codes of the symbols using Huffman coding.

10. (a) Explain the operation of an FDM system.

(b) Describe the constraints of CDMA.

11. (a) Point out the important functions of a telephone set.

(b) Explain the frequency re-use and cell splitting in cellular communication.

12. (a) Discuss the necessity of quantization in ADC. Describe non-uniform quantization.

(b) Describe the following:

(i) FSK;

(ii) PSK;