Source: https://fr.scribd.com/document/320443681/Ies
Timestamp: 2019-04-26 12:07:01+00:00

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negative error band will be 8%.
The neutral zone is also known as dead band.
Air-conditioning system works essentially on a two-position control basis.
carrier gives the information about.
com Page 3 25. K2 s+5 s+5 (d) K1 s+2 s+2 . If reflection coefficient for voltage be 0⋅6. 1 Floor. 2. Then the impedance Z11 and Z22 are given respectively by s+5 s+2 s+2 s+5 (a) K1 . 3 and 4 11. the pressure can be measured by (a) 1 and 2 only (b) 3 and 4 only (c) 2 only (d) 1. Amplitude and frequency of limit cycle if exists can be evaluated. 9810958290 . 3 and 4 (b) 2 and 3 only (c) 3 and 4 only (d) 2. Which of the above statements are correct? (a) 1. R1 1 Z11(s) ⎯→ 2 L ←⎯ Z22(s) R2 1′ 2′ For the circuit shown above. www. Steady state accuracy and existence of limit cycle can be predicted. the voltage standing wave ratio (VSWR) is (a) 0⋅66 (b) 4 (c) 1⋅5 (d) 2 13. without knowing which refers to open-circuit and which to shortcircuit.India’s No 1 IES Academy (b) (c) (d) Engineering Service Examination-2010 Electrical Engineering Paper-I Density of charge carrier Both sign and density of charge carrier Mass of the charge carrier 9. the mechanical dimensions of the substances are not at all altered. 3. Converts electrical energy to mechanical and vice versa. When electric field is applied. Near IIT. Consider the following statements with reference to the phase plane : 1. Rolta meter 2. Bourdon tube 3. New Delhi-16 Ph: 011-26537570. 4. 2. 2. Planti meter 4.com st E-mail: iesacademy@yahoo. Consider the following units for the measurement of pressure directly : 1. 2. K2 . K2 (b) K1 s+2 s+5 s+5 s+2 (c) K1 s s+2 . Jia Sarai. K2 s+5 s+5 12. 3. 3 and 4 only 10. Can be applied to discontinuous time system. Consider the following statements : Piezoelectric materials serve as 1. the natural frequencies at port 2 are given by s + 2 = 0 and s + 5 = 0.iesacademy. They are general and applicable to a system of any order. Vanes Of these. A source of ultrasonic waves.
Near IIT.com Page 4 25. New Delhi-16 Ph: 011-26537570.com st −0 ⋅ 03⎤ 0 ⋅ 03 ⎥⎦ V2 (d) ⎡ −0 ⋅ 04 ⎢ 0 ⋅ 04 ⎣ −0 ⋅ 04 ⎤ −0 ⋅ 03 ⎥⎦ 0 ⋅ 03⎤ 0 ⋅ 03⎥⎦ E-mail: iesacademy@yahoo. The main shortcomings of diaphragms are that they are prone to shock vibrations. Selection of material for diaphragms mainly depends upon temperature range and chemical nature of fluid coming in contact with diaphragm during pressure measurement. 3 and 4 14. 2. 3. A two-port network is defined by the relation : I1 = 5 V1 + 3 V2 I2 = 2 V1 – 7 V2 The value of Z12 is (a) 3 (b) –3 3 2 (c) (d) 41 31 15. Diaphragms have the advantages of high accuracy and good dynamic response. The Z-transform of x(K) is given by (1 − e− T )Z −1 x(Z) = (1 − Z −1 ) (1 − e− T Z −1 ) The initial value x(0) is (a) Zero (c) 2 (b) (d) 1 3 17. 1 Floor. 9810958290 . Jia Sarai.India’s No 1 IES Academy Engineering Service Examination-2010 Electrical Engineering Paper-I 4. I1 25 Ω + + V1 100 Ω 2I 1 – – The Y-parameters of the network shown above are ⎡0 ⋅ 04 ⎡ −0 ⋅ 04 −0 ⋅ 04 ⎤ (b) ⎢ (a) ⎢ ⎥ 0 ⋅ 03 ⎦ ⎣0 ⋅ 04 ⎣ 0 ⋅ 04 (c) ⎡ 0 ⋅ 04 ⎢ −0 ⋅ 04 ⎣ www. 2.iesacademy. 2 and 3 (b) 2 and 3 only (c) 1 only (d) 1 and 2 only 16. Consider the following statements : 1. Which of the above statements is/are correct? (a) 1 only (b) 2 and 3 only (c) 1 and 3 only (d) 1. Converts thermal energy to electrical energy. Which of the above statements is/are correct (a) 1.
Electric field 3. Y-connected (Star connected) source with VRN = 100 volts is connected to a Δ-connected (Delta connected) balanced load of (8 + j6) ohms per phase. Light energy 2. 3 and 4 19. 9810958290 . Which of the above statements are correct? (a) 1. 2. Liquid crystal display Codes : A B C D (a) 1 2 4 3 (b) 3 2 4 1 (c) 1 4 2 3 (d) 3 4 2 1 23. Match List I with List II and select the correct answer using the code given below the lists: List I List II A. Applied voltage 4. Rochelle salt.com st 1⎤ . Quartz. Varistor B. 4. Then -5⎥⎦ E-mail: iesacademy@yahoo. which is subjected to a strain of 1 × 10–6. New Delhi-16 Ph: 011-26537570. This exhibits the reverse effect of electrostriction. A balanced RYB-sequence. Measuring low magnetic field D. The change in resistance due to the applied strain is (a) 60 Ω (b) 240 × 10–6 Ω (c) 240 Ω (d) 60 × 10–6 Ω 21. A two-port network is described by the following equations : V1 = 50 I1 + 20 I2 V2 = 30 I1 + 10 I2 Then. 1 Floor. A resistance strain gage with gage factor (Sf) of 2 is bonded to a steel member. Jia Sarai.com Page 5 25. Then the phase current and line current values respectively. 30A (c) 10 A. which one of the following is not correct : (a) Z12 = 20 (b) Y12 = 0⋅2 (c) h12 = 2⋅0 (d) A = 25 22.India’s No 1 IES Academy Engineering Service Examination-2010 Electrical Engineering Paper-I 18. Near IIT. Consider the following statements : Piezoelectric materials 1. 2. Photodiodes C. 3. ⎡0 The system matrix of a continuous time system is given by A = ⎢ ⎣ -3 the characteristic equation is (α) σ2 + 5σ + 3 = 0 (β) σ2 (χ) σ2 + 3σ + 5 = 0 3σ 5=0 www. Used in voltage stabilizers. are (a) 10 A. 10 A (d) 10 3 A.iesacademy. tourmaline. Hall effect 1. 30 A (b) 10 3 A. Crystal can be shown as electrical equivalent circuit similar to an inductor and a capacitor (Tank circuit). 2 and 4 only (b) 1 and 2 only (c) 2 and 4 only (d) 1. The original resistance value of this strain gage is 120 Ω. 10 3A 20.
Digital instruments are ordinarily used for the measurement of both analog and digital quantities. Is linear. 9810958290 . Jia Sarai. Contains bilateral elements.India’s No 1 IES Academy (δ) Engineering Service Examination-2010 Electrical Engineering Paper-I 2 σ +σ+2=0 24. 20 (c) 20 rad/s. the resonant frequency of the circuit is (a) 10 rad/s (b) 7 rad/s www. 0⋅05 (b) 10 rad/s. The major advantage of digital instruments over analog instruments is higher accuracy and better resolution. 4 H.c.com st E-mail: iesacademy@yahoo. 2. 2. there are small changes in dimensions. Consider the following statements : The transfer impedances of a 2-port network remain constant when the position of excitation and response are interchanged if the network 1. Consider the following statements : 1. 2.2 (b) 50 Ω. if the damped frequency is bandwidth is 2 rad/s. if R = 40 Ω. 3. Electromagnetic flowmeter is independent of liquid density.3 (c) 100 Ω. (d) 50 Ω. Has high impedance. 20 27. Which of the above statements is/are correct? (a) 1. the bandwidth and quality factor are respectively (a) 20 rad/s. 10 (d) 0⋅05 rad/s. For a parallel resonant circuit. H. When a ferromagnetic substance is magnetized. 3 3π 2π 29. For a parallel RLC circuit. the values of R. 3 and 4 25. If a series RLC circuit resonates at 1⋅5 kHz and consumes 100 watts from a 100 volts a.iesacademy. Consider the following statements : 1. (a) 100 Ω. The main drawback of digital system is that the real world is mainly analog. L and Q-factor of the circuit are respectively. L = 2 H and C = 0⋅5 F. 1 Floor. 3 and 4 only (c) 2 only (d) 1. New Delhi-16 Ph: 011-26537570. 2 2π 3π 2 0.com 8 rad/s and the Page 6 25. Near IIT. 1 H. 2. Is resonant. 0. The phenomenon is called (a) Hysteresis (b) Magnetostriction (c) Diamagnetism (d) Dipolar relaxation 26. 3 and 4 (b) 1 and 3 only (c) 2 only (d) 1 and 2 only 30. source operating at resonant frequency with a bandwidth of 0⋅75 kHz. 2. Electromagnetic flowmeter cannot be employed for measuring flow of nonconducting fluids. Which of the above statements is/are correct? (a) 1 and 2 only (b) 1. 4. Which of the above statements is/are correct? (a) 1 only (b) Both 1 and 2 (c) 2 only (d) Neither 1 nor 2 28.1 0. 3. H.
the two natural frequencies of the driving-point impedance Z(s) are given by s + 1 = 0 and s + 4 = 0. For the network function. C Z(s) ⎯→ R1 3 Ω 4 R For the circuit shown above. 9810958290 . A 4-digit DVM (digital voltmeter) with a 100-mV lowest full-scale range would have a sensitivity of how much value while resolution of this DVM is 0⋅0001 ? (a) 0⋅1 mV (b) 0⋅01 mV (c) 1⋅0 mV (d) 10 mV 33. 1 Floor. 2 34.India’s No 1 IES Academy (c) Engineering Service Examination-2010 Electrical Engineering Paper-I 3 rad/s (d) 2 rad/s 31. 2 (c) 100. It is not known. The bandwidth is 10 kHz.iesacademy.com st E-mail: iesacademy@yahoo.com Page 7 25. s . The resonant frequency of an RLC series circuit is 1⋅5 MHz with the resonating capacitor of 150 pF. 0 ⎣ ⎦ The poles of a two-dimensional vector and A is a matrix given by A = the system are located at (a) – 2 and + 2 (b) – j2 and + j2 (c) – 2 and – 2 (d) + 2 and + 2 • 35. Near IIT. Jia Sarai. the resonant frequency and bandwidth are respectively T(s) = 2 s + 2s + 100 (a) 10. 1 (d) 100. New Delhi-16 Ph: 011-26537570. which is for open-circuit and which is for short-circuit. Then Z(s) is given by 3 (s + 4) (a) 16 (s + 1) 3 (s + 4) (b) 4 (s + 1) (s + 1) (c) 3 (s + 4) 1 (s + 4) (d) 3 (s + 1) www. The effective value of the resistor is (a) 16⋅3 Ω (b) 9⋅5 Ω (c) 7⋅4 Ω (d) 4⋅7 Ω 32. 1 (b) 10. The state variable description of a linear autonomous system is X = AX where X is ⎡ 0 −2 ⎤ ⎢2 ⎥.
. Ferrites 3.s . Cannot be shaped by ordinary machining process Codes : A B C D (a) 2 4 1 3 (b) 3 4 1 2 (c) 2 1 4 3 (d) 3 1 4 2 39. Match List I with List II and select the correct answer using the code given below the lists: List I List II (Meter) (Type) A. 1H Z(s) ⎯→ R1 1 2F 1H 2 3F 1 6F For the circuit shown. Weston frequency meter 2. Magnetocaloric effect D. the steady state response is given by (b) 1 ⋅ 0 0º (a) 0 ⋅ 5 0º (c) 2 ⋅ 0 0º (d) 2 ⋅ 0 90º 38. 9810958290 . Electro-dynamic Codes : A B C D (a) 2 1 4 3 (b) 3 1 4 2 (c) 2 3 4 1 (d) 3 4 1 2 37. the values of Z(s) as s → 0 and s → ∞ respectively given by 2 6 2 . Near IIT. ± j1. Reed frequency meter 1. Magnetostrictive transducers C. 1 Floor. Ferro-electric materials 1. Match List I with List II and select the correct answer using the code given below the lists: List I List II A. Ferro-magnetic materials 4. Weston Synchroscope 3.com Page 8 25. Ohm meter 4. New Delhi-16 Ph: 011-26537570. (b) (a) s 8s s 8s s 6 2 (c) (d) 4s + . Neel temperature B. Vibrating C. A transfer function has a zero at s = – 1 and poles at s = –1. Moving coil D. Jia Sarai. 6 2 s s www.com st E-mail: iesacademy@yahoo. The multiplier being unity.India’s No 1 IES Academy Engineering Service Examination-2010 Electrical Engineering Paper-I 36.iesacademy. Anti-Ferroelectric materials 2. if the input is unit step function. Moving iron B.
4 coulomb 44. Dielectric loss of a capacitor 3. then the characteristic impedance of the transmission line is (a) 70 ohm (b) 60 ohm (c) 50 ohm (d) 40 ohm 46.C. 9810958290 .iesacademy. Power loss of an insulator 4. B. Consider the following statements : The coercive force can be increased by 1. D. the voltage and charge on the capacitor at t = 3 sec after connecting a current source IS = 2 A at t = 0 are respectively (a) 2 V. If the load impedance is 100 ohm and input impedance is 25 ohm. 2. 3.c. 8 coulomb (d) 8 V. 2. 3 and 4 (b) 1 only (c) 2 only (d) 1 and 3 only 45. Potentiometer at 20 Hz D. If the initial voltage across the capacitor of 2 Farad is V(0) = 1. T> 1 + Ts 0. 1. A. Which of the above statements is/are correct? (a) 1. 4 coulomb (b) –2 V.com st E-mail: iesacademy@yahoo. Iron loss of a choke carrying a. 4. Adding Cobalt because it is a ferromagnetic material. Space charge polarizing. Calibration of a dynamometer 2. New Delhi-16 Ph: 011-26537570. Potentiometer testing at high voltages Codes : A B C D (a) 3 1 4 2 (b) 2 1 4 3 (c) 3 4 1 2 (d) 2 4 1 3 43.c. Oscilloscope Type wattmeter C. Electrostatic wattmeter current at 50 Hz along with d.India’s No 1 IES Academy Engineering Service Examination-2010 Electrical Engineering Paper-I 40. The transfer functions of a phase-lead compensator is given by G)s = 1 + 3Ts .C. The maximum phase shift provided by such a compensator is (a) 90° (b) 60° (c) 45° (d) 30° 42.com Page 9 25. Adding Gold because it is a diamagnetic material. Near IIT. Jia Sarai. 4 coulomb (c) 4 V. Match List I with List II and select the correct answer using the code given below the lists: List I List II A. Adding Super alloy. 1 Floor. The precision of a ramp type digital voltmeter depends on (a) Frequency of the generator and slope of the ramp (b) Frequency of the generator (c) Slope of the ramp (d) Switching time of the gate 41. Temperature below which certain materials are anti-ferromagnetic is called (a) Curie temperature (b) Neel temperature www.
1 Floor. 2. Electromagnets.com st E-mail: iesacademy@yahoo. the steady-state voltage across C will be reduced.com Page 10 25. If R is 1. 2. 3. The instrument can be used for the measurement of voltage up to 10 V by (a) Connecting a resistance of 999 ohm in series with the instrument (b) Connecting a resistance of 999 ohm parallel to the ammeter (c) Connecting a resistance of 999 ohm parallel to the load (d) Connecting a resistance of 1000 ohm in series with the load 49. 3. Increased. Reduced to zero. the transient oscillation will die down at a fast rate. 9810958290 . Reduced. A moving coil ammeter having a resistance of 1 ohm gives full scale deflection when a current of 10 mA is passed through it. Is not dependent on the relative permeability of the medium. 3 and 4 51. Consider the following statements : Electrets are the materials which are 1. Similar to anti-ferroelectric materials. 3 kΩ A B 4 kΩ t =0 + + 40 V – + – 5 kΩ 0. www. At t = 0. Very similar to permanent magnet materials. Near IIT. Increased. 4. 2. Depends on the nature of the magnetic material. 3 and 4 48. Which of the above statements is/are correct? (a) 2 only (b) 4 only (c) 2 and 4 only (d) 1. Jia Sarai. 3. the frequency of transient oscillations across C will be reduced. 4.5 mF 30 V VC(t) – For the circuit shown above. the peak amplitude of the voltage across C will be double that of input voltage. Cannot be determined by measuring the force exerted on a magnetic material when placed in a magnetic field. Which of the above statements is/are correct? (a) 2 only (b) 1 and 3 only (c) 2 and 3 only (d) 1.India’s No 1 IES Academy (c) Engineering Service Examination-2010 Electrical Engineering Paper-I Wein temperature (d) Debye temperature 47. the switch has been in position A for a long time. Then. Consider the following statements : A step voltage is applied to an under-damped series RLC circuit in which R is variable. the capacitor voltage VC(t) for t > 0 is (a) VC(t) = (24 – 6 e–2t) V (b) VC(t) = (30 – 15 e–0⋅5t)) V (c) VC(t) = (6 – 6 e–2t) V (d) VC(t) = (30 – 5 e–0⋅5t)) V 50. Consider the following statements : Magnetic susceptibility 1.iesacademy. Having permanent electric moments. New Delhi-16 Ph: 011-26537570. 2. 2. the switch is moved to B.
2. New Delhi-16 Ph: 011-26537570. –4 (b) 0. For a series RLC circuit energized with a sinusoidal voltage source of frequency 4 rad/s. Transformers www. respectively values of v and = dt (a) 2. Near IIT.25 H 0. 0 56. the dv are. r(t) + K s(s + 1) (s + 6) – c(t) The feedback system shown above is stable for all values of K given by (a) K > 0 (b) K < 0 (c) 0 < K < 42 (d) 0 < K < 60 54. the applied voltage lags the current by an angle of tan–1 2 degrees. Fibrous materials 3. is given by (a) 249⋅9 kΩ (b) 200 Ω (c) 200 kΩ (d) 2⋅5 kΩ 55. Can be determined form M – H curve. Jia Sarai.iesacademy. Wires C. Enamel covering 1. 3 only 4 (b) 1 only (c) 1 and 4 only (d) 2 only 52. Laminations B. having 50 V range with 5 kΩ/V sensitivity. S + C=2F – 0. – 0⋅5 (d) 2. the initial inductor current and the voltage across the capacitor are zero and 2. Which of the above statements is/are correct? (a) 1.India’s No 1 IES Academy Engineering Service Examination-2010 Electrical Engineering Paper-I 4. employing a 200 μA meter movement and having internal resistance of 100 Ω. Insulation 2. Machines D. Empire cloth 4. respectively. Match List I with List II and select the correct answer using the code given below the lists: List I List II A.com Page 11 25.com st E-mail: iesacademy@yahoo. The value of the multiplier resistance for a dc voltmeter. When the switch S is closed at t = 0. 0⋅25 (c) 0.25 Ω v For the given circuit. 9810958290 . 1 Floor. Then the value of R for L = 1 H and C = 0⋅05 F is (a) 4⋅0 ohm (b) 2⋅0 ohm (c) 1⋅0 ohm (d) 0⋅5 ohm 53.
9810958290 . the force on the conductor is (a) 4 ⋅ 0 a^ Y N (b) 1 ⋅ 0 a^ Z N (c) 1 ⋅ 0 a^ Y N (d) 3 ⋅ 0 a^ Z N 61.India’s No 1 IES Academy Codes : A (a) 2 (b) 3 (c) 2 (d) 3 Engineering Service Examination-2010 B 4 4 1 1 Electrical Engineering Paper-I C 1 1 4 4 D 3 2 3 2 57. Power at frequencies ranging from dc to RF 3. A conductor 2 metre long lies along the Z-axis with a current of 10 A in a^ Z ^ direction. 1 Floor. Power at unity power factor and at high values 4. The voltage reflection coefficient is 1 1 (b) (a) 4 3 1 (c) (d) 1 2 59. A signal of 10 V is applied to a 50 ohm coaxial transmission line. Induction C. Thermal Codes : A B (a) 3 1 (b) 2 1 www. Power at 50 Hz only 2. Near IIT. the reactive power absorbed by the circuit is (a) 100 VARs (b) 200 VARs (c) 300 VARs (d) 400 VARs 58. 3.c. 4. If the magnetic field is B = 0 ⋅ 05 a X T. Inversely proportional to the square of the supply voltage. Directly proportional to the square of the supply voltage. Dynamometer D.com Page 12 25. Match List I with the lists: List I A. Which of the above statements are correct? (a) 1 and 3 only (b) 2 and 3 only (c) 2 and 4 only (d) 1 and 4 only 60. terminated in a 100 ohm load.com st List II and select the correct answer using the code given below List II 1. the number of roots in the right half S-plane for the characteristic equation : S4 + 2s3 + 2s2 + 3s + 6 = 0 is (a) One (b) Two (c) Three (d) Four 62. Electrostatic B.iesacademy. circuit. Using Routh’s criterion. Directly proportional to the frequency of supply voltage. For an a. New Delhi-16 Ph: 011-26537570. Consider the following statements : Factors affecting the dielectric loss are 1. if v(t) = 160 sin (ωt + 10°) and i(t) = 5 sin (ωt – 20°). 2. Jia Sarai. Inversely proportional to the supply frequency. Power at frequencies ranging from dc 150 Hz C 4 4 D 2 3 E-mail: iesacademy@yahoo.
4. High permittivity. Near IIT. A load is connected to an active network. Then the maximum power supplied to the load is (a) 360 W (b) 90 W (c) 60 W (d) 10 W 67.iesacademy. A basic D’ Arsonval movement with a full scale deflection of 50 μA and internal resistance of 500 Ω is used as voltmeter. Ionic and Orientational polarization 66. The value of the multiplier resistance needed to employ this meter to measure a voltage range of (0 – 10) V is given by (a) 100 kΩ (b) 500 kΩ (c) 199⋅5 kΩ (d) 2 × 105 kΩ 68. 9810958290 . the dielectric constant of a material will be due to (a) Electronic polarization (b) Ionic polarization (c) Electronic and Ionic polarization (d) Electronic. 3 and 4 65. At the terminals to which the load is connected. New Delhi-16 Ph: 011-26537570.com st E-mail: iesacademy@yahoo. 1 Floor. Jia Sarai. Low dissipation factor. The feedback control system represented by the open loop transfer function 10(s + 2) is G(s) H(s) = [(s + 1) (s + 3) (s − 5)] (a) Unstable (b) Stable (c) Marginally stable (d) Insufficient stable www. Should give uniform electric and thermal properties.com Page 13 25. 2. Consider the following statements : Characteristics of a good insulating material are 1. 2 3 3Ω + 4V – 1Ω 1A For the circuit shown. At a measuring frequency of 1012 Hz. Rth = 10 Ω and Vth = 60 V. 3.India’s No 1 IES Academy (c) (d) 3 2 Engineering Service Examination-2010 4 4 Electrical Engineering Paper-I 1 1 63. the voltage across the 1 ohm resistor is given by 7 5 V V (b) (a) 4 4 7 2 (c) (d) V V 3 3 64. 2. Low insulating resistance. Which of the above statements are correct? (a) 1 and 4 only (b) 2 and 4 only (c) 1 and 3 only (d) 1.
RN = 1⋅6 Ω (d) IN = 4 A. Dominant closed-loop poles occur in the form of a complex conjugate pair.com st E-mail: iesacademy@yahoo. All superconductors are paramagnetic materials. 1 Floor. Engineering Service Examination-2010 Electrical Engineering Paper-I Consider the following statements regarding measurement of 3-phase power by two-wattmeter method. Consider the following statements about superconductors : 1. Superconductors become normal when placed in a magnetic field of certain critical value. 9810958290 . 2. one of the wattmeter reads negative implying : 1. Load power factor angle is greater than 60°. Which of the above statements are correct? (a) 1 and 2 only (b) 2 and 4 only (c) 1. The property characteristic of ferroelectric materials is (a) Dielectric relaxation (b) Dielectric breakdown (c) Spontaneous polarization (d) Spontaneous magnetization 72. Superconductors repel magnetic flux lines. 2. 4Ω 4Ω a + + 24 V – 8Ω ←⎯ 4A – b Applying Norton’s Theorem. www. Power flow is in the reverse direction. 2. 3. Poles on jω-axis will make the output amplitude neither decaying nor growing in time. The temperature at which the conductor becomes a superconductor is called transition temperature.com Page 14 25. RN = 4 Ω (b) IN = 4 A. 3 and 4 70. Near IIT. RN = 3 Ω 71. 2 and 4 only (d) 1. Jia Sarai. New Delhi-16 Ph: 011-26537570. Load is unbalanced Which of the above statements are correct? (a) 1 and 2 only (b) 2 and 3 only (c) 1 and 3 only (d) 1. A uniform plane wave is propagating in a material for which ε = 4 ε0. the Norton’s equivalent circuit to the left of the terminals a and b in the above circuit is having equivalent current source (IN) and equivalent resistance (RN) as (a) IN = 5 A. Consider the following statements in connection with the closed-loop poles of feedback control system : 1.iesacademy. Power factor is less than 0⋅5. The skin depth for the material is (a) Zero (b) Infinity (c) 28 m (d) 14 m 73. 4.India’s No 1 IES Academy 69. 3. 3 and 4 74. RN = 6 Ω (c) IN = 9 A. 2. μ = 7 μ0 and σ = 0. 4. 2.
2 and 4 only (d) 1.com Page 15 25. Magnesium Codes : A B C D (a) 4 3 2 1 (b) 1 3 2 4 www. Which of the above statements is/are correct? (a) 2 only (b) 2. 3 and 4 only (c) 1. Constantan D. Near IIT. j50 Ω 10 Ω 50∠0° ZL The maximum power that can be transferred in the load ZL in the above circuit is (a) 12⋅25 W (b) 62⋅5 W (c) 24⋅5 W (d) 500 W 79. Match List I with List II and select the correct answer using the code given below the lists: List I List II A. 2. New Delhi-16 Ph: 011-26537570. Nichrome C. Precision work 1. 3 and 4 75. 4. Graphite B. Heating devices 3. A 1 mA meter movement with an internal resistance of 100 Ω is to be converted into (0 – 100) mA. Brushes 4.India’s No 1 IES Academy Engineering Service Examination-2010 Electrical Engineering Paper-I 3. 1 Floor.iesacademy. The presence of complex conjugate closed-loop poles reduces the effects of such non-linearities as dead zones. To achieve this. The gain of a higher order system is adjusted so that there will exist a pair of complex conjugate closed-loop poles on jω-axis. Jia Sarai. Consider a unity feedback control system with open-loop transfer function K (s + 1) . Rheostat 2. value of shunt resistance Rsh is given by (b) 200 Ω (a) 1 kΩ (c) 1⋅01 Ω (d) 1⋅01 kΩ 78. 9810958290 . The sensitivity of 200 μA meter movement when it is used as a dc voltmeter is given by (a) 500 Ω/mV (b) 5 Ω/mV (c) 0⋅5 Ω/mV (d) 5 Ω/mV 76. The steady-state error of the system due to a unit step input G(s) = s(s + 2) (s + 3) is K (a) Zero (b) 6 6 (c) (d) Infinite K 77. backlash and coulomb friction.com st E-mail: iesacademy@yahoo.
3 and 4 only (d) 1. Which of the above statements are correct? (a) 1 and 2 only (b) 2 and 3 only (c) 1 and 3 only (d) 1. 2. 1⋅5 Ω (c) 1⋅5 V. 3 and 4 www. In conducting medium the field attenuates exponentially with increasing depth. 1⋅5 Ω 83. They read equally well on dc and/or ac circuits.com Page 16 25. 3.com st E-mail: iesacademy@yahoo. 9810958290 .India’s No 1 IES Academy (c) (d) 4 1 Engineering Service Examination-2010 2 2 Electrical Engineering Paper-I 3 3 1 4 80. They are simple and robust in construction and power consumption is low. In lossless dielectric relaxation time is infinite. if ‘a’ and ‘c’ represent. 0⋅75 Ω (d) 5⋅0 V. Which of the above statements are correct? (a) 1. They are quite suitable for measurement of currents at very high frequencies. the Poisson’s equation becomes Laplace’s equation. 3 and 4 only (c) 2.iesacademy. Near IIT. 1⋅5 Ω (b) 1⋅5 V. 2. ⎛c⎞ respectively the short and long unit cell dimensions the ⎜ ⎟ ratio should be ⎝a⎠ (b) 0⋅74 (a) 12⋅00 (c) 1⋅633 (d) 16⋅33 82. 3 and 4 81. 2Ω A 3A 1Ω 3Ω B The Thevenin’s equivalent of the circuit shown above is (a) 0⋅75 V. New Delhi-16 Ph: 011-26537570. In a Hexagonal Close Packed (HCP) crystal structure. Consider the following statements : 1. Consider the following statements about hot-wire instruments : 1. 2. Jia Sarai. 2. 1 Floor. 3. 2 and 3 only (b) 1. 4. Conducting medium behaves like an open circuit to the electromagnetic field. In charge-free region.
Electrical Engineering Paper-I 4Ω 2Ω I 1Ω 6A For the circuit shown above.iesacademy.India’s No 1 IES Academy Engineering Service Examination-2010 84. I is (a) 0 A (c) 2 A + 3Ω (b) (d) – 3V 1A 3A 85. In free space E(Z. Are in spontaneously polarized state 2. 9810958290 . Semiconductors C.com Page 17 25. Finite forbidden gap 3. Partially filled bands D 1 4 1 4 1Ω 40 V + – I2 2Ω 4A I2 3Ω www. t) = 60 π cos (ωt – βZ) a X V/m. 1 Floor. Smaller forbidden gap 4. Metals B. Jia Sarai. Insulators D. Ferroelectric crystals Code : A B C (a) 4 3 2 (b) 1 3 2 (c) 4 2 3 (d) 1 2 3 88. The average power crossing a circular area of π square metres in the plane Z = constant is (a) 16 π watts/m2 (b) 15 π watts/m2 (c) 14 π watts/m2 (d) 13 π watts/m2 87. and select the correct answer using the code given below List II 1. A semiconductor has a band gap of 2 eV. Near IIT.com st 4Ω E-mail: iesacademy@yahoo. Match List I with List II the lists: List I A. New Delhi-16 Ph: 011-26537570. The wavelength of radiation emitted form the semiconductor when electrons and holes recombine is (a) 625 nm (b) 625 μm (c) 625 mm (d) 625 cm 86.
com Page 18 25. 9810958290 . New Delhi-16 Ph: 011-26537570. the voltage across the strip in micro volt is www. 4 A (b) 3 A . (a) 4 A . If the electron density is 10⋅0 × 1028 per cubic metre. The limiting error in percentage for this instrument is (a) 2.5% (b) 0. the value of K for damping s(s + 4) (b) (d) 16 2 The pressure in a tank varies from 20 psi to 100 psi. – 0⋅4545 A (b) 2⋅451 A. The current measured by this ammeter is 10 Amp. The full scale error. 5A (c) 2 A .com st E-mail: iesacademy@yahoo. 30 Ω 5Ω I1 10 A 5Ω I2 20 Ω + – 100 V The currents I1 and I2 in the above circuit are respectively (a) 1⋅818 A.5% (c) 0. Near IIT. 6 A (d) 6 A.5 is (a) 1 (c) 4 91. K .025% 90.25% (d) 0.iesacademy. when pressure inside the tank is 30 psi. 1 Floor. Jia Sarai. 2A 89. – 1⋅818 A (d) 1⋅56 A. Further pressure in the tank is desired to be kept at 50 psi. is given by (b) 25% (a) –62⋅5% (c) 80% (d) –2⋅5% 92.India’s No 1 IES Academy Engineering Service Examination-2010 Electrical Engineering Paper-I The currents I1 and I2 in the above circuit are respectively. A(0 – 25) Amp ammeter has a guaranteed accuracy of 1 percent of full scale reading. The following data are obtained by measurement on gold : Density = 19⋅32 gm/cc Resistivity = 2⋅42 μΩ/cm Atomic weight = 197⋅2 The mobility of electrons in gold is (a) 4⋅39 × 10–3 m2/V-sec (b) 4⋅39 × 10–2 m2/V-sec (c) 4⋅39 m2/V-sec (d) 4⋅39 × 103 m2/V-sec 94. – 2⋅45 A 93. Given a unity feedback system with G(s) = ratio of 0. – 1⋅568 A (c) 0⋅4545 A. A magnetic field B of 2 T is normal to a copper strip 0⋅5 mm thick carrying an electron current of 40 A.
The limiting error in percentage is (b) 0⋅05% (a) 2⋅5% www. Tungsten. Nickel. 105⋅0 ohms 3. Which of the above statements is/are correct? (a) Both 1 and 2 (b) Neither 1 nor 2 (c) 1 only (d) 2 only 99. A distinct pole always lies on the real axis.India’s No 1 IES Academy (a) (c) 95. Copper 4. Engineering Service Examination-2010 Electrical Engineering Paper-I 40 20 (b) (d) Match List I with List II and select the the lists: List I A. 1 Floor. A (0 – 250) V voltmeter has a guaranteed accuracy of 2 percent of full scale reading. A resistance of 105 ohms is specified using significant figures as indicated below : 1. Molybdenum 3. 98. 9810958290 .com st E-mail: iesacademy@yahoo.com Page 19 25. Metals for lightly loaded contacts D. Aluminium. then the value of E will be (a) 2 V (b) 4 V (c) 8 V (d) 16 V 97. (d) 2 represents greater precision but 1 and 3 represent same precision. The voltage measured by this voltmeter is 150 volts. High resistivity materials C. Consider the following statements in connection with pole location : 1. 105 ohms 2. 30 10 correct answer using the code given below List II 1. Carbon 2. 0⋅000105 μΩ Among these (a) 1 represents greater precision than 2 and 3. 2. Platinum. A dominant pole has a large time constant. Jia Sarai. Materials for bimetallic strip Code : A B C D (a) 3 1 2 4 (b) 4 1 2 3 (c) 3 2 1 4 (d) 4 2 1 3 96. Iron. (b) 2 and 3 represent greater precision than 1.iesacademy. (c) 1. 2 and 3 represent same precision. High conductivity materials B. New Delhi-16 Ph: 011-26537570. Constantan 1Ω 1Ω + E 1F – 1H If the power dissipated in the circuit shown above is 8 W. Near IIT.
respectively (a) 5 A.iesacademy. 2. Consider the following statements referring to the magnetization : 1. 1 Floor. Jia Sarai. Which of the above statements is/are correct? (a) 1 only (b) 2 and 3 only (c) 1 and 4 only (d) 1. 3 and 4 104. 2. Stronger than primary bonds. 2 and 3 only (b) 2. The solenoid dipole is represented by an infinitesimal current loop. Near IIT. which one of the following statements is not correct? (a) The force on the 3 nC charge is repulsive. (c) The forces Q1 and Q2 are same in magnitude. 8 V 101. 12 V (d) 4 A. 3 and 4 102. 3 and 4 only (c) 3 only (d) 1. In solenoid magnetization is due to a surface current distribution. Point charges of Q1 = 2 nC and Q2 = 3 nC are located at a distance apart. The magnetization is entirely solenoidal and divergent Which of the above statements is/are correct? (a) 1. 3.com st E-mail: iesacademy@yahoo. 4. 103. Can be divided as electrostatic bonds. (d) The forces on Q1 and Q2 will depend on the medium in which they are placed. The attraction forces exist between atoms or molecules. Weaker than primary bonds. Increase in the applied reverse voltage to a p-n junction results in increase in the (a) Depletion width (b) Barrier height (c) Depletion width and barrier height (d) Junction temperature www. Magnetization has its origin in circulating current. With regard to this situation. 10 Ω 20 V IX + 7A 5Ω 2Ω 2Ω VX – 20 V The current Ix and voltage Vx in the above circuit are. (b) A change of –5 nC placed midway between Q1 and Q2 will experience no force. 2. 2. New Delhi-16 Ph: 011-26537570. 10 V (b) 10 A. 3. 20 V (c) 6 A. 4.India’s No 1 IES Academy (c) Engineering Service Examination-2010 Electrical Engineering Paper-I 3⋅33% (d) 5⋅0% 100.com Page 20 25. Consider the following statements : Secondary (or Molecular) bonds are 1. 9810958290 .
2. Assertion (A) : A thin sheet of conducting material can act as a low-pass filter for electromagnetic waves.India’s No 1 IES Academy Engineering Service Examination-2010 Electrical Engineering Paper-I 105. 9810958290 . Consider the following statements with regard to manufacture of a standard resistor : 1. 2. Reason (R) : Piezoelectric transducers have very good high frequency response.com Page 21 25. 4. You are to examine these two statements carefully and select the answers to these items using the codes given below : Codes : (a) Both A and R are individually true and R is the correct explanation of A (b) Both A and R are individually true but R is not the correct explanation of A (c) A is true but R is false (d) A is false but R is true 108. Feedback can improve stability or be harmful to stability if it not properly applied. Consider the following statements in connection with the feedback of control systems : 1. 3 and 4 only (c) 1.com st E-mail: iesacademy@yahoo. Which of the above statements is/are correct? (a) 1 and 2 only (b) 1 only (c) 1 and 3 only (d) 3 only 107. 2 and 3 only (b) 1. Reason (R) : The depth of penetration is inversely proportional is inversely proportional to the square root of the frequency. Assertion (A) : Piezoelectric transducers can be used for measurement of both static and dynamic phenomena. the value of current. Feedback can always improve stability. 109. New Delhi-16 Ph: 011-26537570. I is (a) 2 A (b) 3 A (c) 6 A (d) 12 A 106. Jia Sarai. In many situations the feedback can reduce the effect of noise and disturbance on system performance. 2. Which of the above statements are correct? (a) 1. Resistors are shielded against magnetic field. one labeled as the ‘Assertion (A)’ and the other as ‘Reason (R)’. 3. I 2Ω + + 1Ω 60 V 1Ω – 12 V – 2Ω For the circuit shown. 1 Floor. Near IIT. www.iesacademy. 3. 2 and 4 only (d) 1. 3 and 4 Directions : Each of the next thirteen (13) items consists of two statements. Nickel-chromium is best suited for resistance of high value. The material should be of high resistivity and low temperature coefficient. In general the sensitivity of the system gain of a feedback system to a parameter variation depends on where the parameter is located.
Reason (R) : Comparison methods of direct measurements give high accuracy. Reason (R) : Ionic and covalent bonds are generally lower than other primary bonds. 116. 112. 118. Assertion (A) : A thermocouple type of indicating instrument measures the true r. Near IIT. Jia Sarai. Assertion (A) : The Q-meter measure the Q-factor of a coil when the circuit is in resonance. 119. 115. www. Reason (R) : It uses a p. Reason (R) : The Q-factor of a coil depends only on its inductance and not on its resistance. 114. simple and rugged in construction and are capable of providing large force and wide pressure range of measurements. Reason (R) : Bellows are rugged. type of indicating instrument to measure the current. Assertion (A) : Process industry applications should ideally be tuned for critical damping. New Delhi-16 Ph: 011-26537570. Reason (R) : Ferromagnetic material is magnetic only when the domains are aligned by an external field. Reason (R) : Magnetic cores are slow and volatile. Assertion (A) : Magnetic cores are generally used in main memory of a digital computer. Assertion (A) : Comparison methods of direct measurements are most widely used in electrical engineering practice. Assertion : Intrinsic semiconductors show negative Hall coefficient. 111. Reason (R) : Critically damped response has no oscillations in the output. 9810958290 .iesacademy. Assertion (A) : Ionic bonds and covalent bonds are higher than metallic bonds.com Page 22 25. 117. 1 Floor.m.m.c.m. Assertion (A) : The effects of noise disturbance and parameter variations are relatively easy to visualize and access through frequency response. Assertion (A) : Bellows are quite suitable for dynamic pressure measurements. Reason (R) : Frequency response test is suitable for systems with very large time constants. Reason (R) : The number of electrons and holes are equal in an intrinsic semiconductor. value of the current that passes through it. Assertion (A) : All the coefficients of the characteristic equation should be positive and no term should be missing in the characteristic equation for a system to be stable.s. 120. Assertion (A) : The spins within a magnetic domain are aligned permanently below Curie temperature in a ferromagnetic material. 113. Reason (R) : If some of the coefficients are zero or negative then the system is not stable.India’s No 1 IES Academy Engineering Service Examination-2010 Electrical Engineering Paper-I 110.com st E-mail: iesacademy@yahoo.

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