Ultimate Engineering Study Guide - Questions & Answers

Determine the response of an LTI system whose impulse response h(n) and input x(n) are given by h(n)= {1, 2, 1, -2, -1}, x(n)= {1, 2, 3, -1, -3}
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PMOS is good for delay from A) In an CMOS logic, NMOS is good for transferring logic transferring logic a) '1', '0' b) '0', '1' c) '0', '0' d) '1','1' B) An increase in the threshold voltage, Vtn of NMOS will result in logic '1' to '0' a) Increase b) Decrease c) Not affected C) Switching power dissipation can be given as a) C X VDD X f 2 b) VDD x f 2 c) C X VDD 2 d) C X VDD f D) The effective width of two series NMOS with W=6um and W=3um is a) 9 um b) 3 um c) 2 um d) 1 um E) Increasing fan-out, the propagation delay a) increases b) decreases c) does not affect d) exponentially decreases
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6. A 25hp 600v 3 phase synchronous motor is unable to start with the proper size of time delay fuse. What is the maximum allowable size fuse that can be used? a. 40A b. 90A c. 70A d. 100A 7. What is the minimum trade size of conduit if R90 copper conductor is required to supply a 575v 3 phase SCIM with an insulation class of B and FLA of 82A? a. 27 b. 35 C. 41 d. 53 8. What is the minimum allowable size of R90 copper conductor for use to supply the secondary resistors of a 575v 3 phase 50hp class B insulation rating wound rotor motor? a. #10 b. #8 c. #6 d. #4 9. A motor nameplate states the following: 600v 3 phase 40hp SF 1.17, FLA 35A, Ins B, what conductor size would be used to supply the motor? a. #10 b. #6 C. #4 d. #8 incly for ?
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Project#7 Design and Simulate Uncontrolled Rectifier which should be able to power up a 2 Ampere, 5 Volts DC Load. Expected Deliverables Proposed Circuit Calculations of circuit components Justification of each circuit component selected for the project Relevant Data Sheet of each circuit element Highlight relevant parts of Data Sheets justifying your selection Working Simulations (In Proteus) Device Specifications 5 V, 2 Amps
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For an N channel E MOSFET what is the value of Id when VGS(Th)=3 V and Vgs(on)=4 V and k=1.5 mA/V2. Id=Blank 1 mA
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Explain the technique to generate and detect PPM and PWM signals with neat block diagrams and time domain waveforms. b. Explain the technique to generate natural PAM signal with neat block diagram.
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Explain, with schematic and phasor diagrams, the construction and principle of operation of a split-phase AC induction motor. Indicate the phasor diagram at the instant of starting and discuss the speed-torque characteristics (1) A 1/4 hp 220 V 50 Hz 4-pole capacitor-start motor has the following constants. Main or Running Winding: Zrun = 3.6+ J2.992 Auxiliary or Starting Winding: Zstart=8.5+ 3.90 Find the value of the starting capacitance that will place the main and auxiliary winding currents in quadrature at starting.
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1.A 4-pole DC machine, having wave-wound armature winding has 55 slots, each slot containing 19 conductors. What will be the voltage generated in the machine when driven at 1500 r/min assuming the flux per pole is 3 mWb?A 4-pole DC machine, having wave-wound armature winding has 55 slots, each slot containing 19 conductors. What will be the voltage generated in the machine when driven at 1500 r/min assuming the flux per pole is 3 mWb?2.A 4-pole DC machine, having wave-wound armature winding has 55 slots, each slot containing 19 conductors. What will be the voltage generated in the machine when driven at 1500 r/min assuming the flux per pole is 3 mWb?a.The armature currentb.The generated EMF
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For the given system: Input: x(t) = 2(e-t + e-5t)u(t) Output: y(t) = 4(e-t-e-5t)u(t) *u(t)=1, t0 and 0 otherwise. Find 1) H(jw), i.e., frequency response or the transfer function in the frequency domain. 2) h(t), i.e., impulse response or the inverse fourier transform of the transfer function. Useful Fourier transform: C c(e-at)u(t)= a+jw * c and a are positive constants.
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a. Explain one technique to generate DSB-SC signal with neat block diagram and mathematical analysis. b. Why DSB-SC cannot be demodulated using non- coherent method? Discuss a method with mathematical analysis and block diagram to detect DSB-SC signal.
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Sketch the Magnitude and Phase Bode Plots of the following transfer function on semi-log papers. G(s) : (s + 0.5) (s +500) s (s +20) unis
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What addressing mode does MOV DX, AB28H use? 3.2) What are the destination and source operands? 3.3) How large is each operand?
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Suppose the total inductance of the cable per unit length is given by L, draw the equivalent circuit of the co-axial cable and state any assumptions made. Derive the characteristic impedance of the cable.
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Sketch the Magnitude and Phase Bode Plots of the following transfer function on semi-log papers. G(s) = 4 (s + 5) s (s + 100)
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Describe one technique of achieving arc interruption in medium voltage A.C. switchgear. Sketch a typical waveform found in high voltage switchgear. Explain the term 'sufficient dielectric strength. Draw and explain, a two and four switch sub-station arrangement.
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Assume that a common mode fault of 0.1 v enters your amplifier input via the wiring that connects your sensor to your amplifier. Also assume that your amplifier has a CMRR of 80 dB. What then will be the total output of your amplifier when UNM = 0.01117 Volt? and UCM=0.1CMRR=20logFNMFCMU=UNM*FNM+UCM*FCMtheese are the equation that i have.. dunno if it helps.
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Activity 1. Determine the stability of the closed-loop transfer function via Stability Epsilon Method and reverse coefficient TS) = 20 255 + 454 +683 + 12s2 + 10 + 6
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The maximum ims voltage appears across the load of single-phase AC voltage regulator when the firing angle equal to a. 00 b. 1200 c.1800 d.90 a. 00 Ob. 1200 c.1800 d.900
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(a) Discuss the importance of fault impedance and fault current estimation. (6) Discuss the effect of +ve, ve and 0-sequence voltage on the stator of an induction motor. (c) Draw the +ve, -ve and 0-sequence components of an unbalanced system as given in Figure Q2(e)(d) A 20 MVA, 6.6 kV 3-0 generator possesses Zn = j1.5, Z2 = j1.0 and 2 = j0.5 and Zn = 0. (i) If a single line to ground fault (SLGF) occurs on phase a, find out the fault current. (ii) Predict the fault current if the fault is through an impedance of j2.
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Problem 1 The transfer function of a motor-driven lightly-damped pendulum (not inverted) is given by 1 1 G(s = (8 + 1)2 +992 +28+10 A PI control, having the transfer function Kis+K2 PI(8) = is considered. The forward loop transfer function is thus given by F(s) = Kis+K2 1 $2 +2s + 10 (a) Determine the region in the K2, K1 plane (if any) for which the closed loop system, having the transfer function H(s) = F(s)/(1+F(s)) is stable (b) Sketch this region. Problem 2 The system of Problem 1 is operated with Ki=KK2 = 3K Sketch the root locus for the system as K varies from 0 to 0, showing important features, including ==Openloop poles and zeros -Axis crossings Segments on the real axis -Asymptotes as K+ Problem 3 Sketch the Nyquist diagram for the system of Problem 2, showing important features, including -Behavior as w0 -Behavior as w -Axis crossings
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What is the convolution sum of x[n] = u[n+ 2] and h[n] = [n 1] y[n] = x[n] h[n] a) u[n+ 1] b) u[n] c) u[n 1] - d) u[n-2] e) None of the above
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b) Explain the rate of change of voltage of a thyristor in relation to reverse-biased (5 Marks) c) Draw and explain how a 3-phase fully controlled converter operates. (5 Marks)
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10 3. A three-stage common-emitter amplifier has voltage gains of Av1 - 450, Av2=-131, AV3 = -90 A. Calculate the overall system voltage gain.. B. Convert each stage voltage gain to show values in decibels (dB). C. Calculate the overall system gain in dB.
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b) Explain the classification of circuit breakers, their operational use, and benefits. (8 Marks) c) Describe one technique of achieving arc interruption in medium voltage A.C. switchgear.
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