III B.Tech II Semester Supplementary Examinations, Apr/May 2006 POWER SYSTEMS-III (Electrical & Electronic Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. Discuss the behaviour of traveling wave when it reaches the end of (a) open circuited
[5]
(b) short circuited transmission line. Draw diagrams to show voltage and current on the line before and after the wave reaches the end. [5+3+3]
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2. (a) Discuss the causes of switching surges .
(b) Explain the selection of surge arresters with reference to switching surges . [ 8+8] 3. Explain the following terms in relation to Fuse (a) Fuse element (b) Minimum Fusing current (c) Fusing factor
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(d) Cut off current.
4. Explain direct testing of circuit breakers with a neat diagram.
[4x4=16]
[8+8]
5. (a) What is meant by directional feature of a directional over current relay? Describe the construction, principle of operation and application of a directional over current relay. [2+2+2+2] (b) What is the difference between a polarized mho and simple mho relay. What are self-polarized and cross-polarized mho relays? [4+4]
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6. (a) Explain with necessary diagrams the operating principle a Rectifier bridge phase comparator. [6+2]
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(b) Why are block average phase comparator preferred over block spike phase comparator. [4+4]
7. (a) What is a direct connected generator? (b) Mention protective schemes for a direct connected generator. Explain any one of these schemes. [6+5+5]
8. (a) Discuss the choice between impedance, reactance and Mho type relays. [2+2+2+2]
1 of 2
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Code No: NR320205
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(b) Transformer: 5MVA, Y / ∆, X=6% The transmission line sections AB and BC are to be protected by Mho distance relays. The system is as shown in the figure1. If the C.T. ratio is 300/5 and C.T. ratio is 166000/110V and a 3-∅ short circuit fault of zero impedance occurs at F, find the impedance seen by the relays and determine the setting of the relays for high speed protection of line AB and backup protection for line BC, when the relays are located at end A. [8]
Code No: NR320205 III B.Tech II Semester Supplementary ...
POWER SYSTEMS-III · (Electrical & Electronic Engineering) · Time: 3 hours ... 1. Discuss the behaviour of traveling wave when it reaches the end of ... (b) Explain the selection of surge arresters with reference to switching surges . [ 8+8].
1.a) Explain with a neat sectional view the operation and advantages of hot blast · cupola. b) Discuss the various types of refractories used for cupola lining.
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Code No: NR320802. NR ... 1. (a) Define reaction rate constant. Develop an expression that facilitates calcula- · tion of units of rate constant for any order.
c) Determine the symmetrical components of currents in the following circuit · (contdâ¦3) · AjntuWorld. ... a) Synchronous phase modifiery · b) Insulating materials.
Write a short note on 'compressor surge and its prevention'. 6.a) In rocket propulsion, explain the following: · (i) Thrust coefficient (ii) Characteristic velocity (iii) Specific impulse. b) Derive the 'Generalised Thrust Equation, of a rocket from
Code No: 320452. III-B.Tech II-Semester Supplementary Examination December2002/January 2003 · LINEAR DIGITAL I.C.APPLICATIONS · (Common to Electronics and Communication Engineering, · Electronics and Control Engineering, Electronics Instrumentation ·
with 64 addressing modes. The computer has 500 instructions. In one of the · instruction format the First Field represents operator field, Second Field is Mode,.
1. a) With a schematic diagram explain the operation of a hot blast cupola. What is its · application? b) How are the refractories classified? Explain the factors in ...
Describe the manufacturing process of paper with a neat flow diagram. 4. a) Distinguish between Oils and ... Toilet Soaps · (c) · Vinyl Chloride (e) · Nylon - 6,6 (f).
4.a) What are the advantages of barometric condenser over surface condenser in steam · jet refrigeration system. b) Explain the phenomenon of energy transfer ...
5.a) Explain the principle of working of a precision rotary phase shifter, with neat ... and (ii) a simple ideal dielectric phase shifter in a rectangular guide.
ARTIFICIAL INTELLIGENCE · (Computer Science ... Every dog has bitten a mail carrier (ii) Every dog has bitten every mail · carrier. b) Explain the six ...
Draw and explain the three layer networks that emulates the 'XOR' function. ... Hopfield network could be used to perform error correction, although in fact, it is.
320256. III-B.Tech. II Semester Supplementary Examinations December 2002/January 2003 · MODELLING OF POWER SYSTEM COMPONENTS · (Electrical and Electronics Engineering) · Time: 3 hours · Max. Marks: 70 · Answer any FIVE questions · All questions carry
Explain the following top-down parsing methods with example. a) Recursive-Descent parsing · b) Predictive parser · 5.a) Explain about the specification of a ...
1011. 7.a) Discuss the generation and detection of pulse width modulation. b) Explain the principle transversal equiliber. 8. Write short notes on the following:.
b) Draw a graph showing the refractive index distribution of central core cladded · optical fibre and explain the plot. 2.a) Give any three applications of optical ...
mutual exclusion may be violated. b) Discuss the timestamp-based protocol for concurrent atomic transactions. 7.a) Differentiate protection and security.
signed 16-bit numbers. n xi · 2 · b) Write an 8086 assembly language program to compute Σ ------ · i=1 n · where xi is represented in 16-bits. 4.a) List and ...
