Enroll. No. BE SEMESTER III MID SEMESTER-I EXAMINATION WINTER 2018 SUBJECT: ENGINEERING ECONOMICS AND MANAGEMENT (2130004) (CE/IT/EC/EE) DATE: 07-08-2018 TIME: 10:00 am to 11:30 am TOTAL MARKS:40 Q.1 (a) Give the differences between microeconomics and macroeconomics. [03] (b) Discuss the managerial skills. [03] (c) Define GDP and GNP. Q.2 (a) Discuss in details the determinants of supply. (b) Distinguish between Perfectly Competitive Market and Monopoly Market. (c) Define economics. Why is the study of Economics useful in engineers? Q.2 (a) Define Demand. Explain law of demand with the help of a diagram. (b) How is economics important to engineers? (c) Explain the factors of production. Q.3 (a) Explain scientific principles of management in details. (b) Differentiate between Management and Administration. (c) List down the 14 principles of management given by Henri Fayol. Q.3 (a) Explain Maslow s need Hierarchy theory in detail with diagram. (b) Discuss the 10 managerial roles given by Henry Mintzberg. (c) Write a short note on Levels of Management. Enroll. No. BE - SEMESTER III MID SEMESTER-I EXAMINATION WINTER 2018 SUBJECT: Digital Electronics (2131004) (CE/IT/EC)
DATE: 11-08-2018 TIME:10:00 am to 11:30 am TOTAL MARKS:40 Q.1* (a) Differentiate combinational and sequential circuits. [03] (b) Explain full adder in detail [03] (c) Conversions 1)Binary to Decimal (1011.01)2 2) Given that (16)10 = (100)x, find the value of x. 3)Binary Division (101101)2 / (110)2 4)Using 10 s compliment subtract : (2928.54 416.73)10 Q.2 (a) Explain NAND as a universal gates. (b) Using D as the VEM, reduce Y = A'B'CD + A'B'CD' + ABC'D' + ABCD' + ABCD + AB'CD' + A'BCD + A'BC'D' + AB'C'D+ABC'D (c) Use a 4 1 MUX to implement the logic function, F(A,B,C) = m(1,2,4,7). Q.2 (a) State and prove De-Morgan s Theorems for two and three variables with the help of Truth tables. (b) Design and implement BCD to EX-3 code converter. (c) Explain the 4 bit parallel binary substractor. Q.3 (a) Minimize the following Boolean expression using K map and implement the same using gates. F = m(0,2,6,10,11,12,13) + d(4,5,14,15) (b) Design and explain 4-bit magnitude comparator. (c) Reduce the expression F = ((AB)'+A'+AB)' and draw the logic diagram for the given expression. (a) Explain JK Flip flop with necessary circuit diagram and tables. (b) Explain the conversions of T to D Flip-flop (c) Explain the 3*8 decoder Enroll. No. BE - SEMESTER III MID SEMESTER-I WINTER 2018 SUBJECT: Electronics Devices & Circuits (2131006) (EC) DATE: 08/08/2018 TIME: 10:00 am to 11:30 pm TOTAL MARKS: 40 Q.1 (a) Differentiate conductor, semiconductor and insulator with the help of their [03] energy band diagrams. (b) Differentiate drift current and diffusion current in semiconductor. [03] (c) Draw V-I characteristics of P-N junction diode and mention cut-in voltage of Silicon and Germanium diode.
Q.2 (a) Describe the rectification and working of bridge rectifier circuit with neat circuit diagram. (b) Explain operation of Zener Diode as voltage regulator. (c) Explain the formation of p-type and n-type semiconductors in detail. Q.2 (a) A sinusoidal voltage of peak value of 40 Volts and frequency of 50 Hz is applied at the input of a half wave rectifier, No filter is used. The load resistance is 500 Ω. Diode has internal forward resistance of 5 Ω. (a) Draw output voltage waveforms and calculate (a) Im, Idc, Irms (b) DC output voltage and (c) Rectification Efficiency. (b) Explain zener breakdown and avalanche breakdown mechanisms in semiconductor diode. (c) Compare CE, CB and CC configurations of transistor. Q.3 (a) Draw CE transistor configuration and its input and output characteristics. Also indicate regions of operation. (b) State the use of clipping circuits. Discuss working of any two clipper circuits with the help of waveform. (c) Explain DC load line and Q-point for any transistor configuration. Q.3 (a) Explain following for npn transistor: (a) Current Components, (b) Region of operation according to biasing conditions. (b) Discuss working of negative Clamper circuit and Positive Clamper circuit with the help of input and output waveforms. (c) Define alpha (α) and Beta(β) of transistor. Derive relation between α and β. Enroll. No. BE - SEMESTER III MID SEMESTER-I EXAMINATION WINTER 2018 SUBJECT: CIRCUITS AND NETWKS (2130901) (EC/EE) DATE: 06-08-2018 TIME: 10:00 am to 11:30 am TOTAL MARKS: 40 Q.1* (a) Define following terms. [03] 1) Potential Difference 2) Current 3) Electric Field (b) Explain KVL and KCL. [03] (c) Explain ideal and practical independent sources in detail. Q.2 (a) Find current and voltage drop through 5 ohm resistor using KVL in network shown in figure.
(b) Derive the equation for maximum power transfer. (c) Write and explain any five rules for source transformation. Q.2 (a) In below figure, Find V1 and V2 using KCL. (b) State Millman s theorem. Obtain the equivalent of a parallel connection of three branches each with a voltage source and a series resistance, (2V, 1 Ohm), (3V, 2 Ohm) and (5V, 2 Ohm). (c) State thevenin s theorem and explain in detail. Q.3 (a) State Thevenin s theorem. Calculate current passing through 60Ω resistance in the circuit shown in figure below using thevenin s theorem. (b) Find current in 20 ohm resistance in the circuit shown in figure below using superposition theorem. (c) State norton s theorem and explain in detail. Q.3 (a) Using source shifting and source transformation find out the voltage Vx in the figure.
(b) State reciprocity theorem and explain with one example. (c) Give one example of superposition theorem.
Enroll. No. BE - SEMESTER III MID SEMESTER-I EXAMINATION WINTER 2018 SUBJECT: ADVANCED ENGINEERING MATHEMATICS (2130002) (ALL BRANCHES) DATE: 09-08-2018 TIME: 10:00 am to 11:45 am TOTAL MARKS: 40 0,0 < t < π Q.1* (a) Find the Laplace Transform of the function f(t) = { sint, t > π. [03] (b) Find L 1 (tan 1 2 s ). [03] (c) Find a Fourier Series for f(x) = x 2, where π x π. Q.2 (a) Find L 1 1 [ (s 2 +4) 2] using Convolution theorem. (b) State the convolution theorem and verified it for f(t) = t and g(t) = e 2t. (c) 2, x < 2 Find the Fourier integral representation of the function f(x) = { 0, x > 2. Q.2 (a) Solve using Laplace transform: y-3y'+2y = 4t + {e} ^ {3t}, y(0)=1, y'(0)=-. (b) Find (i) L 1 (ii) L 1. (c) Find the Fourier cosine series of f(x) = e x, where 0 x π. π; 0 < x < π Q.3 (a) Expand f(x) in Fourier series in the interval (0,2π) if (x) = { x π; π < x < 2π. 1 Hence show that r=0. (b) Find the Fourier Series for f(x) = e ax in (0,2π); a>0. (c) Find the Laplace Transform of (i)f(t) = (ii)f(t) = sinwt. t Q.3 (a) Express the function f(x) = { 1for x 1 as a Fourier integral. 0for x 1 Hence, evaluate (a) sinωcos(ωx) dω (b) 0 sinω dω 0 ω ω (b) (c) Find Fourier series off(x) = x + x 2, π < x < π. Hence deduce that π 2 = 1 + 1 + 1 +. 6 1 2 2 2 3 2 Find (i)l(t 3 + e 3t + t 3 2 t ) (ii) L { et sin t dt} 0 t BE - SEMESTER III MID SEMESTER-I EXAMINATION WINTER 2018
SUBJECT: ELECTRICAL MACHINE (2131005) (EC) DATE: 10-08-2018 TIME:10:00 am to 11:30 am TOTAL MARKS:40 Q.1 (a) Why 1-phase induction motor is not self-starting? [03] (b) Explain crawling in 3-phase Induction Motor. [03] (c) Derive E.M.F equation of Single phase Transformer. Q.2 (a) Draw complete phasor Diagram for step down transformer when load power factor is lagging. (b) What are the conditions for parallel operation of two transformers. (c) Explain Construction difference between core type and shell type transformer Q.2 (a) What is Auto transformer? Derive equation for saving in copper. (b) Explain sumpner s test performed on transformer. (c) Explain working of transformer under No load condition with help of vector diagram. Q.3 (a) What is construction difference between slip-ring and squirrel cage induction motor. (b) Derive Equation of Starting torque and running torque in three phase Induction motor. (c) Explain power stages of three phase Induction motor. Q.3 (a) Compare star delta Starter with auto transformer starter. (b) What is Slip in Induction motor? Explain torque slip characteristics of three phase induction motor. (c) Explain phenomena of cogging in Induction motor.