Download Previous Year PTU University Question Paper of Power System-1 BTEE-405 4th Sem Batch 2011 Onwards B.Tech PTU April 2013 Question Paper
B.Tech.(EE-2011 Batch)
POWER SYSTEM-1
Subject Code : BTEE-405 Paper ID : [ A1208]
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES : 1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each. 2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions. 3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions
Power System-1 4th Sem Batch 2011 Onwards B.Tech PTU April 2013 Question Paper
SECTION-A
Q1. Write Short Notes on :
a) State disadvantages of HVDC transmission. b) Give the advantages of high voltage AC transmission. c) Mention limitations of Kelvin’s law. d) Enumerate merits of bundled conductor. e) Define safety factor of insulator and give its significance. f) What is skin effect ? Why is it absent in the dc system? g) Define the terms feeder and distributor. h) What is the importance of intersheath in cables? i) State advantages of placing series capacitors in transmission lines. j) What is meant by surge impedance loading?
SECTION-B
Q2. Attempt any FOUR questions. 5×4=20
2. Compare the volume of conductor material required in dc single phase and three-phase ac system. 3. In a 33 kV overhead line, there are three units in the string of insulators. If the capacitance between each insulator pin and earth is 11% of self-capacitance of each insulator, find : (a) the distribution of voltage over 3 insulators (b) string efficiency. 4. A single phase transmission line has two parallel conductors 3 m apart, the radius of each conductor being 1 cm. Calculate the loop inductance per km length of the line if the material of the conductor is : (a) copper (b) steel with relative permeability of 100. 5. Show how regulation and transmission efficiency are determined for medium lines using nominal T method. Illustrate your answer with suitable vector diagram. 6. Derive an expression for the insulation resistance of a single-core cable.
SECTION-C
Q3. Attempt any TWO questions. 2×10=20
7. (a) What is the percentage saving in feeder copper if the line voltage in a 2-wire dc system is raised from 200 volts to 400 volts for the same power transmitted over the same distance and having the same power loss? (b) Show that in a string of suspension insulators, the disc nearest to the conductor has the highest voltage across it. (6,4) 8. (a) Describe the Receiving end circle diagram for long transmission lines based on ABCD constants. (b) Discuss the effect of earth on capacitance of conductors. (6,4) 9. Write short notes on any two of the followings : (a) Synchronous phase modifiers (b) Kelvin’s law (c) Compensation of transmission lines. (2×5)
A 33 kV overhead line, there are three units in the string of insulators. If the capacitance between each insulator pin and earth is 11% of self-capacitance of each insulator, find : (a) the distribution of voltage over 3 insulators (b) string efficiency.
Single phase transmission line has two parallel conductors 3 m apart, the radius of each conductor being 1 cm. Calculate the loop inductance per km length of the line if the material of the conductor is : (a) copper (b) steel with relative permeability of 100.
Expression for the insulation resistance of a single-core cable.
Power System-1 4th Sem Batch 2011 B.Tech PTU April 2013 Question Paper
Power System-1 4th Sem Batch 2011 Onwards B.Tech PTU April 2013 Question Paper
Get Started
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Find percentage saving in feeder copper if the line voltage in a 2-wire dc system is raised from 200 volts to 400 volts for the same power transmitted over the same distance and having the same power loss.
Short Note on (c) Compensation of transmission lines.
Power System-1 4th Sem Batch 2011 B.Tech PTU April 2013 Question Paper
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Download Previous Year PTU University Question Paper of Power System-1 BTEE-405 4th Sem Batch 2011 Onwards B.Tech PTU April 2019 Question Paper
B.Tech.(EE-2011 Batch)
POWER SYSTEM-1
Subject Code : BTEE-405 Paper ID : [ A1208]
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES : 1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each. 2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions. 3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions
Power System-1 4th Sem Batch 2011 Onwards B.Tech PTU April 2019 Question Paper
SECTION-A
Q1. Write Short Notes on :
a. Define slip of an induction motor.
b. Explain slip frequency of a 3-phase induction motor.
c. Why an induction motor operates at a very low power factor under no-load?
d. Why an induction motor cannot run at synchronous speed?
e. Write two application of single-phase induction motor.
f. Why starting current is high for an induction motor?
g. Why airgap between stator and rotor of induction motor is very small?
h. If a single-phase induction motor is started with auxiliary winding open, what will happen?
i. How direction of rotation of a three-phase induction motor can be reversed?
j. Write the difference between a squirrel cage and slip ring induction motor.
SECTION-B
Q2. Attempt any FOUR questions. 5×4=20
2. Discuss losses in a 3-phase induction motor.
3. Sketch and explain toque-slip characteristics of 3-phase induction motor.
4. Explain the starting of squirrel cage induction motor by using Direct-on-line method.
5. Explain how higher starting torque can be obtained in :
a. Squirrel cage induction motor
b. Wound rotor induction motor.
6. Explain how rotating torque is generated in a single-phase induction motor
SECTION-C
Q3. Attempt any TWO questions. 2×10=20
7. Write the constructional features, working principle and applications of single-phase reluctance motor. 8. A 230V, 380W, 60 Hz, 4-pole, single phase induction motor gave the following test results : No-load test : 230V, 84W, 2.8A Blocked-rotor test : 110V, 460W, 6.2A The stator winding resistance is 4.5 ohms and during the blocked rotor test, the auxiliary winding is open. Determine the equivalent circuit parameters and draw the equivalent circuit. 9. Describe the methods of speed control of three phase induction motor.
How rotating torque is generated in a single-phase induction motor
Power System-1 4th Sem Batch 2011 B.Tech PTU April 2019 Question Paper
Power System-1 4th Sem Batch 2011 Onwards B.Tech PTU April 2019 Question Paper
Get Started
https://www.youtube.com/watch?v=UHX6f8TIvX8https://www.youtube.com/watch?v=M_RR6LVICp0https://www.youtube.com/watch?v=mV41CMWonN4https://www.youtube.com/watch?v=s0LVPE0Q3LE&list=PLA9Q9SDZ781WXNAWit379A4CRLMvjGiUw&index=14&t=0s
A 230V, 380W, 60 Hz, 4-pole, single phase induction motor gave the following test results : No-load test : 230V, 84W, 2.8A Blocked-rotor test : 110V, 460W, 6.2A The stator winding resistance is 4.5 ohms and during the blocked rotor test, the auxiliary winding is open. Determine the equivalent circuit parameters and draw the equivalent circuit.
Methods of speed control of three phase induction motor.
Power System-1 4th Sem Batch 2011 B.Tech PTU April 2019 Question Paper
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Download Previous Year PTU University Question Paper of Power System-1 BTEE-405 4th Sem Batch 2011 Onwards B.Tech PTU Nov 2016 Question Paper
B.Tech.(EE-2011 Batch)
POWER SYSTEM-1
Subject Code : BTEE-405 Paper ID : [ A1208]
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES : 1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each. 2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions. 3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions
Power System-1 4th Sem Batch 2011 Onwards B.Tech PTU Nov 2016 Question Paper
SECTION-A
Q1. Write Short Notes on :
a) Why is electrical power preferably to be transmitted at a high voltage?
b) What is the purpose of insulator?
c) What are the materials mainly used in bus bar?
d) What is the main purpose of armouring?
e) State Kelvin’s law.
f) Why all overhead lines use ACSR conductors?
g) What is meant by inductive interference?
h) Why transpositions of conductors are done in overhead lines?
i) Define regulation of power transmission line.
j) What are the different tests that are conducted on an insulator?
SECTION-B
Q2. Attempt any FOUR questions. 5×4=20
2. What are the AC transmission and distribution level voltages we have in India?
3. Why the concept of self G.M.D is not applicable for capacitance?
4. What are the various properties of insulators? Also briefly explain about suspension type insulators.
5. Explain any two methods of grading of cables.
6. Discuss reactive power requirement of system and series compensation.
SECTION-C
Q3. Attempt any TWO questions. 2×10=20
7. Derive the expression for capacitance of a 1 transmission line.
8. A three phase 5 km long transmission line having resistance of 0.5 , / km and inductance of 1.76 mH/km is delivering power at 0.8 pf lagging. The receiving end voltage is 32 kV. If the supply end voltage is 33 kV, 50 Hz, find line current, regulation and efficiency of the transmission line.
9. A transmission line conductor at a river crossing is supported from two towers at heights of 30 m and 90 m above water level. The horizontal distance between the towers is 270 m. If the tension in the conductor is 1800 kg and the conductor weighs 1.0 kg per meter. Find the clearance between the conductor and the water at a point midway between the towers? Assume parabolic configuration.
Reactive power requirement of system and series compensation.
Power System-1 4th Sem Batch 2011 B.Tech PTU Nov 2016 Question Paper Click Here
Power System-1 4th Sem Batch 2011 Onwards B.Tech PTU nov 2016 Question Paper
Get Started
https://www.youtube.com/watch?v=UHX6f8TIvX8https://www.youtube.com/watch?v=M_RR6LVICp0https://www.youtube.com/watch?v=mV41CMWonN4https://www.youtube.com/watch?v=s0LVPE0Q3LE&list=PLA9Q9SDZ781WXNAWit379A4CRLMvjGiUw&index=14&t=0s
Three phase 5 km long transmission line having resistance of 0.5 , / km and inductance of 1.76 mH/km is delivering power at 0.8 pf lagging. The receiving end voltage is 32 kV. If the supply end voltage is 33 kV, 50 Hz, find line current, regulation and efficiency of the transmission line.
Transmission line conductor at a river crossing is supported from two towers at heights of 30 m and 90 m above water level. The horizontal distance between the towers is 270 m. If the tension in the conductor is 1800 kg and the conductor weighs 1.0 kg per meter. Find the clearance between the conductor and the water at a point midway between the towers? Assume parabolic configuration.
Power System-1 4th Sem Batch 2011 B.Tech PTU Nov 2016 Question Paper
MY YOUTUBE CHANNEL
JK Smart Classes Upload Lecture for Degree classes like B.TECH,M.TECH in any stream like ECE,EE,ME and Civil Engineering
JK SMART CLASSES
ER.JASWINDER KUMAR
JK SMART LECTURE
ER.JASWINDER KUMAR
Engineering Classes Upload Lecture for Polytechnic Diploma classes in any stream like ECE,EE,ME and Civil Engineering
ENGINEERING CLASSES
ER.JASWINDER KUMAR
er.jaswinder kumar
Senior Lecturer
JK SMART CLASSES
ER.JASWINDER KUMAR
