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Dr. Mahalingam College of Engineering and Technology, Pollachi-3 (An Autonomous Institution affiliated to Anna University) 6 CCETII (2014 Regulation) 7 In any transmission line, AD − BC = 0 Say True/False should be ................ a.low Distribution The line constants of a transmission line are ........................... Name of Programme:BE-EEE 8 Sem: V Date& Session:08.08.16-AN2 Duration: 1½ hours Max. Marks: 40 Objective Questions Q. No CO Blooms No Level The power loss in an overhead transmission line is mainly due to 1 a.Resistance c.Capacitance b.Inductance U If capacitance between two conductors of a 3-phase line is 4 2 to neutral is ................... . U Transposition of a 3-phase transmission line helps in................ 4 5 ..................... . In short transmission lines, the effects of.................... are neglected. 2 3 U 3 U 3 U U 2 U 3 U d.zero b. lumped In a transmission line, generalised constants .................. and ..................... are equal. When the regulation is positive, then receiving end voltage (VR) is will be less than sending end voltage (VS). Say True/False Short Answer Questions (5X2=10 Marks) Blooms No Level 2 R 12 A 3-phase overhead transmission line has its conductors arranged at the corners of an equilateral triangle of 2 m side. Calculate the capacitance of each line conductor per km. Given that diameter of each conductor is 1·25 cm. 2 U 13 Categorize the transmission lines based on the voltage level 3 R 14 List the limitation of End condenser method 3 U 15 What is the effect of load power factor in regulation 3 U 11 . a. equalising inductance and capacitance of the three phases b. equalising capacitance of the three phases c. equalising inductance of the three phases d. equalising resistance of the three phases If the length of the line is decreased, its capacitance is U CO a. 4 μF b. 8 μF c. 2 μF d. 12 μF 3 3 d. All the above Q. No 2 c. medium a.uniformly distributed Part- B d. None of the above μF, then capacitance of each conductor 9 10 2 b. high c.concentrated (10X1=10 Marks) Question U It is desirable that voltage regulation of a transmission line Course Code & Course Title: 11EE502 – Generation, Transmission and Part- A 3 Question What is the relation between line to line capacitance and capacitance to neutral Part- C Descriptive – either or questions X10=20 Marks) Signature of the Faculty Q. No Question 16. Derive the capacitance equation of a three phase single (a) circuit transmission line for symmetrical and unsymmetrical spacing CO Blooms No Level 2 U OR (i)A single-phase transmission line has two parallel conductors 3 metres apart, radius of each conductor being 1 cm. Calculate the capacitance of the line per km. Given -12 16. that ԑ0=8·854 X 10 F/m.(4 Marks) (b) U 3 U 3 U Code for Blooms Levels: Sl. Blooms Level No. 1 Remember 2 Understand 3 Apply 4 Analyze 5 Evaluate 6 Create Code R U Ap An E C (ii)A 3-phase, 50 Hz,132 kV overhead line has conductors placed in a horizontal plane 4 m apart. Conductor diameter is 2 cm. If the line length is 100 km, calculate the charging current per phase assume complete transposition (6 Marks) 17. (a) 2 Note: Explain the Nominal T method of medium transmission line with equivalent circuit and phasor diagrams OR A 3-phase, 50Hz, 150 km line has a resistance, inductive reactance and capacitive shunt admittance of 0·1ohm , 0·5 -6 (b) ohm and 3 × 10 S per km per phase. If the line delivers 50 MW at 110 kV and 0·8 p.f. lagging, Determine the sending end voltage and current. Use nominal π method. 17. Signature of the Faculty

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