Rony Parvejs EEE Question Bank M.Sc. Admission Test-2014, BUET

Admission Test Question of Bangladesh University of Engineering Technology (BUET) Collected from : Tamal Sarkar (RUET08) & Imam Hasan (DUET04)

Compiled by: Rony Parvej (IUT, EEE07) Post: M.Sc. in EEE

Time: Unknown Full Marks: Unknown

Exam Date: 26.09.2014 Venue: BUET

1. Find the voltage across 1 resistance in the following circuit:

2. What is the value of (a-b) in the following circuit?

3. Draw the phasor diagram of the following RC circuit:

4. In a Y-connected balanced 3-phase circuit Vph = 208 V, p.f. =0.6, P = 300W. Zph = ? ( )

given line voltage 208V, power, pf 0.6. y-y connection balanced 3phase, find impedance on

each phase-math ( )

5. v= 20 sin (t) + 15 sin (2t) 10 sin (3t) i = 6 sin (t+20) + 2sin (t +30) - sin (3t + 60) . Find average power.

( )

v=a sin (t)+ b sin( 2t) + c sin(3t) i=d cos (t+30)+ e cos (t-30) + f cos (t+120) .Find average power.

( )

Rony Parvejs EEE Question Bank M.Sc. Admission Test-2014, BUET 6. Two line currents of an unbalanced 3-phase, 3-wire system are 10090 A and 110-10 A.

Find the third line current.

7. A single line diagram indicated by a point, given 6 fault current from primary and secondary

side. what type of fault to be determined. ( )

Determine the type of fault. ( )

8. .

9. Stevenson Junior (4th ed.) 200 page 8.1

10. Determine the induction torque in a 400 V, 50 Hz, 4-pole, Y-connected induction motor operating at 2% slip with 240W power being lost in its motor winding.

11. If VS = sine wave, then draw Vin - Vout transfer curve.

( )

Draw Vin vs Vout transfer curve of an op amp with 5v reference at negative input, sine wave in

positive input , biasing 12V, at output two zener diodes of 7V and 9V were connected face-to-

face. ( )

12. Answer in one word: i) peak demand in summer in BD

ii) load factor of a base load station

iii)

Iv)

v)

13. 5 MCQ Questions

14. Draw the CMOS complex gate logic circuit function on F = A (B + C ) .

Rony Parvejs EEE Question Bank M.Sc. Admission Test-2014, BUET 15. 6.8 V Zener diode, VZ =6.8 V , IZ = 5 mA, rZ =20, IZK =0.2 mA. Find output voltage.

( )

Zener diode math with fixed load (a very tough one indeed) with PZ, IZ, IZK, RL. Find output

voltage. ( )

16. Find VC , and for common emitter bias.

17. x(t) = 2 sin ( 400 t ) + 4 cos ( 600 t ). Sampling of 2400 Hz. (a) Find the equation of x(n). (b) Find the period of x(n). (c) Draw the spectrum of x(n).

18. Signal power = 2 MW, Noise power = 1.95 MW. Find maximum data rate and Shanons

capacity. [Find maximum delta modulation shanons theorem (300-3300) Hz ]

19. True- False

20. x (t) = 1.5 cos (800t) is to be PCM with minimum SQNR of 25dB. How many bytes are required for encoding each having uniform quantization.

21.

Rony Parvejs EEE Question Bank M.Sc. Admission Test-2014, BUET

22. . B.P lathi (exercise 6.2. 5) ECG math

23. Draw the block diagram of a optical fibre communication system. What type of technique is widely used in multiplexing and what is the most common wavelength used in optical fiber now

a days.

24. a verilog code was given which was actually a Negative edge clock D-FlipFlop. execute