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February 8th, 2016, 11:13 AM
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SAIL Management Trainee previous year question paper for ECE
Will you please share with me the SAIL Management Trainee previous year question paper for ECE as it is very urgent for me? As you want to get the SAIL Management Trainee previous year question paper for ECE so here is the information of the same for you: Q.1.If the voltage applied across a capacitance is triangular in waveform then the waveform of the current is Triangular Trapezoidal Sinusoidal Rectangular Q.2.One of the following statement which is true for relative dielectric constant is - It is dimensionless It is not equal to unity for vacuum It’s value for all substances is less than one None Q.3.Pure metals generally have high conductivity and low temperature coefficient high conductivity and large temperature coefficient low conductivity and zero temperature coefficient low conductivity and high temperature coefficient Q.4.For small size, high frequency coils, the most common core material is Air Ferrite Powdered ion Steel Q.5.For an abrupt junction Varactor diode,the dependence of device capacitance (C) on applied reverse bias (V) is given by C a V1/3 C a V-1/3 C a V1/2 C a V-1/2 Q.6.A superconductor is a A material showing perfect conductivity and Meissner effect below a critical temperature A conductor having zero resistance A perfect conductor with highest dimagnetic susceptibility A perfect conductor which becomes resistive when the current density through it exceeds a critical value Q.7.When a semiconductor based temperature transducer has a temperature coefficient of –2500 mV/0C then this transducer is indeed a Thermistor Forward biased pn junction diode Reverse biased pn junction diode FET Q.8.The location of lightning arrestor is - Near the transformer Near the circuit breaker Away from the transformer None Q.9.Time constant of an RC circuit increases if the value of the resistance is - Increased Decreased Neither a nor b Both a and b Q.10.Intrinsic semiconductors are those which - Are available locally Are made of the semiconductor material in its purest from Have more electrons than holes Have zero energy gaps Q.11.The primary control on drain current in a JFET is exerted by - Channel resistance Size of depletion regions Voltage drop across channel Gate reverse bias Q.12.The electrical conductivity of metals which is expressed in ohm-1 m-1 is of the order of - 1010 105 10-4 10-6 Q.13.When biased correctly, a zener diode – acts as a fixed resistance has a constant voltage across it has a constant current passing through it never overheats Q.14.The current amplification factor adc is given by – IC/IE IC/IB IB/IC IB/IC Q.15.Compared to bipolars, FETs have high input impedance low input impedance same input impedance none Q.16.The source-drain channel of JFET is - ohmic bilateral unilateral both a and b Q.17.A diac is equivalent to a - Pair of SCRs Pair of four layer SCRs Diode and two resistors Triac width Q.18.When a sample of N type semiconductor has electron density of 6.25 ´1011 /cm3 at 300K and if the intrinsic concentration of carriers in this sample is 2.5 ´ 1013/cm3 then the hole density will be – 106/cm3 103/ cm3 1010/ cm3 1012/ cm3 Q.19.When the two networks shown in fig. are equivalent with respect to the terminals 1 and 2 at all frequencies then the values of CA, LB, LC and CC will be – 0.5, 0.33, 6, 0.166 0.5, 3, 6, 0.66 0.5, 3, 3, 2 0.5, 3, 6, 0.166 Q.20.Poles and zeros of a driving point function of a network are simple and interlace on the jw axis.The network consists of elements – R and C L and C R and L R, L and C Q.21.The statement 'In any network of linear impedances, the current flowing at any point is equal to the algebraic sum of the currents caused to flow at that point by each of the sources of emf taken separately with all other emf's reduced to zero’ represents - Kirchhoff's law Norton's theorem Thevenin's theorem Superposition theorem Q.22.One of the following modes which has the characteristics of attenuation becoming less as the frequency is increased and is attractive at icrowave frequencies of circular cylindrical wave guides is – TE1 mode TM01 mode TE01 mode Higher order mode Q.23.A two-port network is symmetrical if – z11z22 – z12z21 = 1 h11h22 – h12h21 = 1 AD – BC = 1 y11y22 – y12y21 = 1 Q.24.For transmission line load matching over a range of frequencies,it is best to use a balun a broad band directional coupler a double stub a single stub of adjustable position Q.25.The poles and zeros of a driving point function of a network are simple and interlace on the negative real axis with a pole closest to the origin. It can be realised - by an LC network as an RC driving point impedance as an RC driving point admittance only by an RLC network Q.1. To neglect a voltage source, the terminals across the source are open circuited short circuited replaced by some resistance replaced by an inductor Q.2.Current I0 in the given circuit will be 10 A 3.33 A 20 A 2.5 A Q.3. In a resonant circuit, the power factor at resonance is zero unity 0.5 1.5 Q.4.In the given circuit voltage V is reduced to half. The current will become I/2 2 I 1.5 I I / √R2 + (XL + XC)2 Q.5.The function 3 s has (s + 1) (s + 2) one zero, two poles no zero, one pole no zero, two poles one zero, no pole Q.6.One electron volt is equivalent to 1.6 * 10-10 J 1.6 * 10-13 J 1.6 * 10-16 J 1.6 * 10-19 J (Ans) Q.7.Which of the following is donor impurity element ? Aluminium Boron Phosphorous Indium. Q.8.The diameter of an atom is of the order 10-6 m 10-10 m 10-15 m 10-21 m Q.9.The following Figure represents LED Varistor SCR Diac Q.10.If the d.c. valve of a rectified output is 300 V & peak to peak ripple voltage is 10 V, the ripple factor is 1.18% 3.33% 3.36% 6.66% Q.11.Full wave rectifier output has ripple factor of 1.11 1.21 1.41 1.51 Q.12.In a common base connection IE = 2 mA, IC = 1.9 mA. The value of base current is 0.1 m 0.2 mA 0.3 mA zero Q.13.For the action of transistor the base region must be P-type material N-type material very narrow highly doped Q.14.Compared to a CB amplifier the CE amplifier has higher current amplification output dynamic resistance leakage current input dynamic resistance all of the above Q.15.When a transistor is biased to cut-off its Y is 0.5 0 1.0 0.8 Q.16.The number of digits in octal system is? 8 7 8 or 7 10 Q.17.The number of digits in hexadecimal system is? 15 10 16 8 Q.18.The number of bits in a nibble is? 8 2 4 16 Q.19.The digit F in hexadecimal system is equivalent to number...........in decimal system? 16 15 17 8 Q.20.Which of the following binary number is equivalent to BCD? 1010 1000 1001 None of these Contact Details: Steel Authority Of India Ltd - Sail Ispat Bhawan Lodhi Rd CGO Complex, Pragati Vihar New Delhi, Delhi 110033 India Last edited by Neelurk; July 7th, 2020 at 03:50 PM. |
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