BTCSE36,BTEE33,BTETE33

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1 BTCSE36,BTEE33,BTETE33 V SEMESTER B.TECH EXAMINATION, JANUARY-2013 COMPUTER ORGANIZATION Time: 3 Hours Max. Marks: 75 GROUP A : Answer any three questions. (Question No. 1 is compulsory) Q.1 Give the organization of first generation computer? (05) Q.2 Compare Architecture Versus Implementation. (10) Q.3 Explain the organization of CPU. (10) Q.4 Explain the concept of parallel computation. (10) Q.5 Explain in detail how data is represented. (10) GROUP B : Answer any three questions. (Question No. 6 is compulsory) Q.6 What is an operating System? (05) Q.7 Explain overall organization of the MIPS RX000. (10) Q.8 What arithmetic and Logic Functions are computed by 7418/ALU When S=S 3 S 2 S 1, S 0 =1100 B) A useful logic operation if is Exclusive-OR Function A B? What values showed S, M, and C have in this case? (10) Q.9 Draw a logic diagram showing how to construct a microprogram Sequencer for a) bit control memory b) bit control memory, using one or more copies of the Amp. (10) Q.10 Show a block diagram for data transfer from CPU to an interface and then to an I/0 device. Determine a procedure for setting and clearing the Flag bit. (10) GROUP C: All Questions are Compulsory. Q.11 Fill in the blanks (each question carries 2 marks) A sequential circuit is an interconnection of flip-flop and. is the most popular storage medium to large data, which are sequentially accessed and processed. The is some time called the primary memory of a computer system. A can assume either a register-to-register architecture or memoryto-memory architecture. Instruction use an implied accumulator register for all data manipulation. Q.12 Multiple choice questions: (Each question carries 2 marks) The Stack pointer is a 8 bit register 16 bit register 32 bit register none The ROM is a- volatile memory nonvolatile memory both a & b none The 8297 is 40 pin device 41 pin device 42 pin devise none The 8085 microprocessor has interrupt inputs-

2 3 4 5 none The time required to complete one operation of an instruction is called T-state Instruction cycle Machine cycle none Q.13 True or false (each question carries 1 mark). A multiprocessor system is an interconnection of two or more CPUs with memory and I/O equipment. A computer will usually have one type of instruction code format. Pipelining is a technique of decomposing a sequential process into sub operations. Swap-in means lifting the program from the memory and placing it on the disk. Virtual memory is a technique that allows the execution of process that is completely in memory ******

3 V SEMESTER B.TECH EXAMINATION, JANUARY-2013 ELECTRICAL MEASUREMENT II BTEE36 Time: 3 Hours Max. Marks: 75 GROUP A : Answer any three questions. (Question No. 1 is compulsory) Q.1 Explain radiometry and photometry. (05) Q.2 Discuss photoemissive cell. (10) Q.3 Explain power measurement and energy measurement. (10) Q.4 Describe electronic voltmeter with its advantages. (10) Q.5 Explain electronic multimeters. (10) GROUP B : Answer any three questions. (Question No. 6 is compulsory) Q.6 Explain various types of forces which are needed for satisfactory operation of any Indicating Instrument. Write various methods to provide them? (05) Q.7 Define the following terms Monochromatic light Linearly polarized light Refraction and Refractive Index Reflection, Absorption and Transmission of light. (10) Q.8 Define the following photometric terms: Lumen, Luminous Intensity, I luminance, Luminance a Luminous Existence (10) Q.9 The indication on a 110V, 5A wattmeter used in conjunction with potential and current transformers of nominal of 100/1 and 20/1 respectively, is 350 W, if resistance and inductance of the wattmeter pressure coil circuit are 362 and 100 MHz respectively, and the ratio errors and phase angles of potential and current transformers at particular working conditions are + 0.8% 45 and 0.2% + 90, what is the true value of the power being measured? The load phase angle is 50 lagging. Frequency is 50 Hz. (10) Q.10 Two wattmeter connected to measure the input to a balance 3 phase circuit indicate 2000W and 500 W respectively. Find the power factor of the circuit (a) when both the readings are positive and (b) when the latter reading is obtained after reversing the connections to the current coil of first instrument? (10) GROUP C: All Questions are Compulsory. Q.11 Fill in the blanks (each question carries 2 marks) The horizontal amplifier should be designed for The effective resistance of a coil at high frequency is more than d.c. resistance an account of. A voltmeter with broad bandwidth has noise level.

4 Optical spectrum has wavelength ranging from. Fluid friction damping can be used in instrument. Q.12 Multiple choice question. (Each question carries 2 marks) Fluid friction damping can be used in (a) Horizontally mounted instruments (b) Vertically mounted instruments (c) Both in horizontally and vertically mounted instruments (d) None of the above The unit luminance are (a) nit (b)1m/sr-m 2 (c) Cd/m 2 (d) All of the above In electrodynamometer type watt meters, current coils designed for carrying heavy currents use standard wire or laminated conductors (a) To reduce iron losses (b)to reduce hystersis losses (c) To reduce eddy current losses in conductors (d)all of the above A voltmeter with a broad band width has (a) Low noise level and high sensitivity (b) High noise level and high sensitivity (c) High noise level and low sensitivity (d) Low noise level and low sensitivity An equadag is used in a CRO to collect: (a) Primary electrons (b)secondary emission electrons (c) Both primary and secondary emission electrons(d)none of the above Q.13 True or false (each question carries 1 mark). Photometry is concerned with measurement of light within the visible band In circuit of RF voltmeter vacuum tube diode is used. Step by step method used for determination of hysterics loop Sphere gap are used for measurement of vms value of voltage. In an electrodynamometer type of wattmeter the pressure coil is fixed. ******

5 BTEE34, BTETE34, BTME34 V SEMESTER B.TECH EXAMINATION, JANUARY-2013 CONTROL SYSTEM Time: 3 Hours Max. Marks: 75 GROUP A : Answer any three questions. (Question No. 1 is compulsory) Q.1 Write note on synchronous. (05) Q.2 The unit step response of a system is given as C(t) = 5/2 + 5t - 5/2e -2t Find the transfer function of the system. (10) Q.3 Give an example of a physical system whose transfer function model has a pole in the right. (10) Q.4 What is advantage of Bode plot over Nyquist plot? (10) Q.5 Draw the Bode plot for a system having (10) 3 G(s) =, H(s) = 1 s(1 0.05s)(1 0.2s) Determine. (a) gain cross over frequency and corresponding phase margin (b) phase cross aver frequency and corresponding gain-margin (c) stability of the closed-loop system (10) GROUP B : Answer any three questions. (Question No. 6 is compulsory) Q.6 Explain open loop system. (05) Q.7 Explain Signal flow graph. (10) Q.8 Explain Write down the short notes on the following (10) (a)lvdt (b) Synchro Q.9 Explain Nyquist criterion for stability and briefly describe phase margin and gain margin. (10) Q.10 State and Explain Manson s gain formula. (10) GROUP C: All Questions are Compulsory. Q.11 Fill in the blanks (each question carries 2 marks) The closed loop transfer function is given by Mason s gain formula for signal flow graph is given by For a PID controller, the ratio of control variable u (t) and error signal e(t) is given by The Laplace transform of ramp signal is given by.. In a second order under damped system d is equel to. Q.12 Multiple choice question. (Each question carries 2 marks)

6 The characteristic equation of an armature controlled D.C. motor is of: (a) Zero order equation (b) First order equation (c) Second order equation (d) Third order equation The best method of analyzing system response is with the following input (a) Ramp input signal (b) Unit impulse input signal (c) Exponentially decaying signal (d) Sinusoidal input signal Introduction to negative feedback in a system does not lead to decrease in (a) Instability (b) Distortion (c) Overall gain (d) Bandwidth The difference of the reference input and output signal is called (a) Error signal (b) Controlling signal (c) Actuating signal (d) None of these A good control system should have all the following characteristics except (a) Good stability (b) Good accuracy (c) Slow response (d) Sufficient power handlingcapacity Q.13 True or false (each question carries 1 mark). A small signal is one which controls a large amount of power and is therefore suitable for actuating signal device. A tacho-generator is an electromechanical device, which produces an output voltage that is proportional to its shaft speed. The steady state error is determined by e ss = s 0Lim s R(s) / 1+ G(s) The value of damping ratio increases with increase in peak overshoot. The bode plot is a logarithmic plot and commonly used for time response. ******

7 BTEE35 V SEMESTER B.TECH EXAMINATION, JANUARY-2013 POWER SYSTEM Time: 3 Hours Max. Marks: 75 GROUP A : Answer any three questions. (Question No. 1 is compulsory) Q.1 Calculate the sag for a span of 200 m if the ultimate tensile strength of conductor is 5758 kgf. The weight of conductor is 604 kgf/km.allow a factor of safety of 2? (05) Q.2 A string of suspension insulators consists of four units. The capacitance between each link pin and earth is one tenth of the self capacitance of a unit. The voltage between the line conductor and and (b) the string efficiency. (10) k C C V 1 V1 V 2 kc C V 2 V 3 kc C V 3 V =v 4 C V 4 Q.3 A single core cable, for working voltage of 6.5 KV (between core and sheath), has a conductor of 10mm overall diameter, which is insulated with impregnated paper to a radial thickness of 7.5 mm and lead covered. Calculate the maximum electric stress on the insulation. (10) Q.4 In a DC 2-wire system a feeder is working on 250V supplying a constant load. If the supply voltage is increased to 400 V with the same power transmitted, calculate the percentage saving in conductor material. (10) Q.5 A signal phase load of 200kv A is delivered at 2500 v over a transmission line having R=1.4n. =0.8n. Calculate the current, voltage and power factor at the sending end when the power factor of the load is (a) unity. (b) 0.8 lagging and (c) 0.8 leading (10) GROUP B : Answer any three questions. (Question No. 6 is compulsory) Q.6 Define the terms : (05)

8 Connected load, maximum demand, demand factor and load factor. Q.7 What is the utility of load curve? What do you mean by peak load? What is annual load curve? (10) Q.8 Discuss BASIC structure of an AC power system. (10) Q.9 Write notes on comparison of conductor costs in various systems (10) Q.10 In a dc 2 wire system a feeder is working on 250V supplying a constant load. If the supply voltage is doubled with the same power transmitted, Calculate the percentage saving in conductor material. (10) GROUP C: All Questions are Compulsory. Q.11 Fill in the blanks (each question carries 2 marks) Demand factor is the ratio of Voltage above 760 KV are known as The resistance of Stranded conductor is than the resistance of equivalent solid conductor. For most economical size of cable max. potential gradient is The expression for air density factor is Q.12 Multiple choice question. (Each question carries 2 marks) The approximate value of irregularity factor for smooth & polished conductor by Peak is (a)0.93 (b) 0.85 (c) 1.00 (d) 0.75 The load at which the inductive and capacitive volt-amperes are equal & opposite is called (a) Dynamic Loading (b) Critical Loading (c) Surge Impedance Loading (d) Optimal Loading In order to reduce the inequality of Inductance and inductive interference with parallel running communication lines, the line uses (a) ACSR Conductor (b) Stranded Conductor (c) Transposition (d) Shielded Conductor Hot wire is obtained by plotting the (a) Sags at maximum temperature against span length. (b) Sags at minimum temperature against span length. (c) Sags at any temperature against span length. (d) None of these. (v ) In order to minimize vibration in a conductor, which one is used (a) Armour rod (b) Jumper (c) Guard wire (d) V-String Insulator Q.13 True or false (each question carries 1 mark). A 3, 3-wire AC system finds greatest use for transmission and secondary distribution.

9 ACSR conductor are not sufficient mechanically strong for construction of Transmission Line. The corona discharge emit radiations which may introduce noise signal in communication channel called R.I. For nominal Model A=D=1+ YZ/2; B= Z (1+ YZ/4); C=Y The per unit impedence referred to either side of single phase transformer is the same. ******

10 BTEE37 V SEMESTER B.TECH EXAMINATION, JANUARY-2013 ADVANCED ELECTRICAL MACHINES Time: 3 Hours Max. Marks: 75 GROUP A : Answer any three questions. (Question No. 1 is compulsory) Q.1 What is the difference between at three phase transformer bank & three-phase transformer unit? (05) Q.2 Explain operation of reluctance motor using appropriate diagram also draw torque-load angle characteristics. (10) Q.3 Discuss the detrimental effects of armature reaction in dc machines. (10) Q.4 What are different types of stepper motor? Explain any one type in detail with diagram. (10) Q.5 What is synchronizing? Explain with diagram synchronizing by dark-lamp method in details. (10) GROUP B : Answer any three questions. (Question No. 6 is compulsory) Q.6 Explain 3Ø shell type transformer with 3 winding wound in same direction with phasor diagram. (05) Q.7 Compare star/star transformer with star/3ig 3ag transformer. (10) Q.8 Explain single phase reluctance motor. (10) Q.9 Compare flux distributing and flux density waveforms due to (a) Field current alone (b) armature current alone and (c) both field and armature current in DC machine. (10) Q.10 Explain regenerative braking. (10) GROUP C: All Questions are Compulsory. Q.11 Fill in the blanks (each question carries 2 marks) If the primary leads of a 3 phase transformer are interchanged cydically once, the secondary line phasors get rotated through a time phasor angle of. If the primary winding terminals of each of the three phase are reversed, then the secondary line voltages are rotated through. Plugging of DC motors is carried out by. A DC shunt motor runs at 500 rpm at 220 V. A resistance of 4.5 ohm is added in series with the armature for spend control. The armature resistance is 0.5 ohms. The current to stall the motor will be. For continuously running rolling mills with inter without loading the most suitable DC drive is a DC motor.

11 Q.12 Multiple choice question. (Each question carries 2 marks) For closed delta connection utilization factor is (a) (b) 1.0 (c) 0.96 (d) The armature produces undesirable effect on main field flux. (a)net reduction in main field flux (b) Increment of main field flux (c) Distortion of the main field flux (d) Both (a) & (c) The necessary condition for parallel operation o alternators are (a) Same polarity (b) Same voltage (c) Same frequency (d) Al of these The electrical representation of variable mechanical load is given by (a)r 2 S/(1-S) (b) r 2 (1-1/S) S (c) r 2 (1-S) / S (d) r 2 (1-S) S In double cage rotor, the outer cage has (a)low X, high R (b) Low R, high X (c) High X, High R (d) None of these. Q.13 True or false (each question carries 1 mark). The secondary of a transformer in interstar has an output voltage of 400 V. If this secondary is reconnected in star then the output voltage becomes 400 V. For successful parallel operation of DC shunt generators the essential condition is that they should have same voltage regulation. In case of 3 phase short circuit test, the maximum value of armature phase current after one half cycle is 2 2E fo /Xd. For successful parallel operation of DC operation of DC generator equalizer is required for series generators only. A DC shunt generator is floating on the bus bar. It can be loaded by decreasing its driving torque. ******

12 BTEE38P-I V SEMESTER B TECH IN ELECTRICAL ENGINEERING EXAMINATION JANUARY-2013 CONTROL SYSTEM Time: 1 hours PART A (5X5=25) Instructions: 1) ANSWER ALL QUESTIONS. 1. Draw and Explain of a Closed Loop System. 2. State and Explain Manson's gain formula. 3. Descibe elements of Automatic or Feedback Control Syatem. 4. Draw schematis diagram and explain Tachogenrator. 5. Draw and explain LVDT.

13 BTEE39P-II V SEMESTER B TECH IN ELECTRICAL ENGINEERING EXAMINATION JANUARY-2013 ADVANCED ELECTRICAL MACHINES Time: 1 hours PART - A (5X5=25) Instructions: 1) ANSWER ALL QUESTIONS. 1. Explain the parallel operation of three phase transformer? 2. Compare the behavior of star/star transformer with star/zigzag transformer? 3. Discuss the adverse effect of unbalanced working of a three phase transformer? 4. What is utilization factor? Find its value for open-delta connection? 5. Derive the expression for field energy, co energy and the magnetic force in a singly excited electromechanical unit?

BTCSE36,BTEE33,BTETE33

BTCSE36,BTEE33,BTETE33 V SEMESTER B.TECH EXAMINATION, JANUARY-2013 COMPUTER ORGANIZATION Time: 3 Hours Max. Marks: 75 GROUP A : Answer any three questions. (Question No. 1 is compulsory) Q.1 Give the organization