III B.Tech II Semester Supplementary Examinations,May 2010 HIGH VOLTAGE ENGINEERING Electrical And Electronics Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. What are the causes for switching and power frequency over voltages? How are they controlled in power systems? [16]
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2. Explain the principle and construction of an electro static voltmeter for very high voltages. What are its merits and demerits for high voltage AC measurements? [16]
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3. Why is synthetic testing advantageous over other testing methods for short circuit tests? Give the lay out for synthetic testing [16] 4. Discuss the “Boundary Element Method” for solving the field problems in high voltage engineering. Compare its merits over the other methods. [16]
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5. Explain the properties and applications of Rubber solid insulating material used in high voltage engineering. Also explain how it is more suitable for cable insulation. [16] 6. (a) Define “Complex permittivity”. What are the factors that govern the quantities “relative permittivity” and “loss factor”? (b) Explain how the volume resistivity of a solid dielectric is determined.
[8+8]
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7. In an experiment for determining the breakdown strength of transformer oil, the following observations are made. Determine the power law dependence between the gap spacing and applied voltage of the oil. [16] Gap Spacing (mm) 4 6 10 Voltage at Breaksown (kV) 90 140 210
12 255
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8. (a) Find the values of α and β for the impulse voltage V = V0 (e−αt − e−βt ) having a wave slope of 1.2 /50 µs. (b) Draw the typical impulse current generator circuit and explain the operation and applications. [8+8] ?????
1
Code No: R05320206
R05
Set No. 4
in
III B.Tech II Semester Supplementary Examinations,May 2010 HIGH VOLTAGE ENGINEERING Electrical And Electronics Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. Discuss the “Boundary Element Method” for solving the field problems in high voltage engineering. Compare its merits over the other methods. [16]
Gap Spacing (mm) 4 6 10 Voltage at Breaksown (kV) 90 140 210
ld .
2. In an experiment for determining the breakdown strength of transformer oil, the following observations are made. Determine the power law dependence between the gap spacing and applied voltage of the oil. [16]
12 255
or
3. Explain the properties and applications of Rubber solid insulating material used in high voltage engineering. Also explain how it is more suitable for cable insulation. [16]
uW
4. What are the causes for switching and power frequency over voltages? How are they controlled in power systems? [16] 5. (a) Define “Complex permittivity”. What are the factors that govern the quantities “relative permittivity” and “loss factor”? (b) Explain how the volume resistivity of a solid dielectric is determined.
[8+8]
6. (a) Find the values of α and β for the impulse voltage V = V0 (e−αt − e−βt ) having a wave slope of 1.2 /50 µs.
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(b) Draw the typical impulse current generator circuit and explain the operation and applications. [8+8]
Aj
7. Explain the principle and construction of an electro static voltmeter for very high voltages. What are its merits and demerits for high voltage AC measurements? [16] 8. Why is synthetic testing advantageous over other testing methods for short circuit tests? Give the lay out for synthetic testing [16] ?????
2
Code No: R05320206
R05
Set No. 1
in
III B.Tech II Semester Supplementary Examinations,May 2010 HIGH VOLTAGE ENGINEERING Electrical And Electronics Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. Why is synthetic testing advantageous over other testing methods for short circuit tests? Give the lay out for synthetic testing [16]
ld .
2. (a) Find the values of α and β for the impulse voltage V = V0 (e−αt − e−βt ) having a wave slope of 1.2 /50 µs.
(b) Draw the typical impulse current generator circuit and explain the operation and applications. [8+8]
or
3. Discuss the “Boundary Element Method” for solving the field problems in high voltage engineering. Compare its merits over the other methods. [16]
4. Explain the properties and applications of Rubber solid insulating material used in high voltage engineering. Also explain how it is more suitable for cable insulation. [16]
uW
5. (a) Define “Complex permittivity”. What are the factors that govern the quantities “relative permittivity” and “loss factor”? (b) Explain how the volume resistivity of a solid dielectric is determined.
[8+8]
6. What are the causes for switching and power frequency over voltages? How are they controlled in power systems? [16]
nt
7. In an experiment for determining the breakdown strength of transformer oil, the following observations are made. Determine the power law dependence between the gap spacing and applied voltage of the oil. [16]
Gap Spacing (mm) 4 6 10 Voltage at Breaksown (kV) 90 140 210
12 255
Aj
8. Explain the principle and construction of an electro static voltmeter for very high voltages. What are its merits and demerits for high voltage AC measurements? [16] ?????
3
Code No: R05320206
R05
Set No. 3
in
III B.Tech II Semester Supplementary Examinations,May 2010 HIGH VOLTAGE ENGINEERING Electrical And Electronics Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ?????
ld .
1. Explain the principle and construction of an electro static voltmeter for very high voltages. What are its merits and demerits for high voltage AC measurements? [16] 2. In an experiment for determining the breakdown strength of transformer oil, the following observations are made. Determine the power law dependence between the gap spacing and applied voltage of the oil. [16] 12 255
or
Gap Spacing (mm) 4 6 10 Voltage at Breaksown (kV) 90 140 210
3. Why is synthetic testing advantageous over other testing methods for short circuit tests? Give the lay out for synthetic testing [16]
uW
4. Discuss the “Boundary Element Method” for solving the field problems in high voltage engineering. Compare its merits over the other methods. [16] 5. (a) Define “Complex permittivity”. What are the factors that govern the quantities “relative permittivity” and “loss factor”? (b) Explain how the volume resistivity of a solid dielectric is determined.
[8+8]
6. (a) Find the values of α and β for the impulse voltage V = V0 (e−αt − e−βt ) having a wave slope of 1.2 /50 µs.
nt
(b) Draw the typical impulse current generator circuit and explain the operation and applications. [8+8]
Aj
7. Explain the properties and applications of Rubber solid insulating material used in high voltage engineering. Also explain how it is more suitable for cable insulation. [16] 8. What are the causes for switching and power frequency over voltages? How are they controlled in power systems? [16] ?????
(b) Explain how the volume resistivity of a solid dielectric is determined. [8+8] · 7. In an experiment for determining the breakdown strength of transformer oil, the.
[16] · 4. What are channel,circuit and half circuit in the context of satellite telemetry sys- .... 3. Describe the conditions for total internal reflection within a fibre. [16].
(b) Describe a DC Servo Motor with a neat sketch. [8+8] · 4. (a) What is a timing belt? Discuss the use of Timing belts in power transmission? (b) Discuss various ...
(b) Consider any two networks of your choice which support Circuit switching or ... (b) Which is more efficient, circuit switching or packet switching? Why?
(a) What is the difference between logical I/O and device I/O? (b) Explain feed back scheduling policy. [8+8] · 2. (a) How can logical address space be ...
kerosene, and fuel oil must be limited as also shown in this table. There are no ... equipment is a function of x, the size (horsepower ) of the motor, namely.
(b) What is meant by displacement function? (c) Give the importance of Pascal Triangle. [4+6+6] · 3. Determine the displacements at nodes and the stresses in ...
The horizontal distance between u/s face and center line of drain holes is 8 m. ... (c) Cut-off trench ... Bed width of parent channel U/S / D/S = 45 m/40 m. [16].
Also draw the relevant circuit diagram. (b) Draw the resistive model of a CMOS inverter and explain its behavior for. LOW and HIGH outputs. [8+8]. 8. (a) It is necessary to identify the position of mechanical disk, when rotates with a step of 450. Gi
4. Give the syntax for 'awk'. Discuss about the selection criteria in awk. How to · embed action in to this command. Explain with examples. [16] · 5. Write about different Unix locking techniques. [16] · 6. (a) What are the differences between shell
of Rs. 1,500 would be deposited in this fund under an ordinary annuity plan. All · money in the fund can be .... (b) Discounted cash flow · (c) Net present worth ... would last for 10 years. A worn-out storage tank of capacity equivalent to the new.
R05. Set No. 2. III B.Tech I Semester Examinations,May 2011 · WEB TECHNOLOGIES · Information Technology ... that describes your college. The paragraph ...
(b) What is the necessity of heat treatment after carburizing? Explain. On what ... (b) What is the difference in heat treatment between 18% Ni and the 25% Nickel.
is subjected to a load of 200 kN, find the stresses developed in the two materials. ... Compare the values of max. and minimum hoop stresses for a cast steel ...
The cores of two identical transformers A and B carry alternating fluxes whose instantaneous values are (0.01 sin 314t)W and 0.012 (1.1 sin 628t+0.1 sin 1884t).
(a) Explain live node, E-node and dead node with an example. (b) Explain the method of reduction to solve TSP problem using Branch and · Bound. [8+8] · 3. (a) Prove that Prim's algorithm finds a minimum spanning tree. (b) Explain the single source sh
at 0.8 p.f. lagging and 15A at 0.6 p.f. lagging respectively, both expressed ... (b) A single-phase motor takes a current of 10 amps at a p.f. of 0.707 lagging.
If the tensile stress is not to exceed 17MPa, find the safe. u.d.l. which the beam can carry. Also find maximum compressive stress. Draw the sketch showing the ...