GATE 2016 Electrical Engineering Session 2
Q. 1 The chairman requested the aggrieved shareholders to _________________ him.
A. bare with
B. bore with
C. bear with
D. bare
Q. 2 Identify the correct spelling out of the given options:
A. Managable
B. Manageable
C. Mangaeble
D. Managible
Q. 3 Pick the odd one out in the following:13, 23, 33, 43, 53
A. 23
B. 33
C. 43
D. 53
Q. 4 R2D2 is a robot. R2D2 can repair aeroplanes. No other robot can repair aeroplanes.Which of the following can be logically inferred from the above statements?
A. R2D2 is a robot which can only repair aeroplanes
B. R2D2 is the only robot which can repair aeroplanes
C. R2D2 is a robot which can repair only aeroplanes
D. Only R2D2 is a robot
Q. 5 If |9y−6| =3, then y² −4y/3 is ______.
A. 0
B. +1/3
C. -1/3
D. undefined
Q. 6 The following graph represents the installed capacity for cement production (in tonnes) and the actual production (in tonnes) of nine cement plants of a cement company. Capacity utilization of a plant is defined as ratio of actual production of cement to installed capacity. A plant with installed capacity of at least 200 tonnes is called a large plant and a plant with lesser capacity is called a small plant. The difference between total production of large plants and small plants, in tonnes is____.
Q. 7 A poll of students appearing for masters in engineering indicated that 60 % of the students believed that mechanical engineering is a profession unsuitable for women. A research study on women with masters or higher degrees in mechanical engineering found that 99 % of such women were successful in their professions.Which of the following can be logically inferred from the above paragraph?
A. Many students have misconceptions regarding various engineering disciplines
B. Men with advanced degrees in mechanical engineering believe women are well suited to be mechanical engineers
C. Mechanical engineering is a profession well suited for women with masters or higher degrees in mechanical engineering.
D. The number of women pursuing higher degrees in mechanical engineering is small.
Q. 8 Sourya committee had proposed the establishment of Sourya Institutes of Technology (SITs) in line with Indian Institutes of Technology (IITs) to cater to the technological and industrial needs of a developing country.
Which of the following can be logically inferred from the above sentence?Based on the
Proposal, (i)In the initial years, SIT students will get degrees from IIT.
(ii)SITs will have a distinct national objective.
(iii)SITs will have a distinct national objective.
(iv)SITs will serve technological needs of a developing country
A. (iii) and (iv) only
B. (i) and (iv) only
C. (ii) and (iv) only.
D. (ii) and (iii) only
Q. 9 Shaquille O’ Neal is a 60% career free throw shooter, meaning that he successfully makes 60 free throws out of 100 attempts on average. What is the probability that he will
successfully make exactly 6 free throws in 10 attempts?
A. 0.2508
B. 0.2816
C. 0.2934
D. 0.6000
Q. 10 The answer of the numerical is
Q. 11 The output expression for the Karnaugh map shown below is
A. A+B̅
B. A+C̅
C. A̅+C̅
D. A̅+C
Q. 12 The circuit shown below is an example of a
A. low pass filter
B. band pass filter
C. High pass filter
D. notch filteR
Q. 13 The following figure shows the connection of an ideal transformer with primary to
secondary turns ratio of 1:100. The applied primary voltage is 100 V (rms), 50 Hz, AC. The rms value of the current I, in ampere, is __________
Q. 14 Choose the correct option
A. A
B. B
C. C
D. D
Q. 15 Suppose the maximum frequency in a band-limited signal x(t) s 5 kHz. Then, the maximum frequency in x(t)cos(2000πt),in kHz, is ________
Q. 16 Consider the function ݂f(z)= z + z* where z*is a complex variable and ∗ݖdenotes its complex conjugate. Which one of the following is TRUE?
A. f(z) is both continuous and analytic
B. f(z) is continuous but not analytic
C. f(z) is not continuous but is analytic
D. f(z) is neither continuous nor analytic
Q. 17 A 3 × 3 matrix ܼܿP is such that P³=P ܼܿ. Then the eigenvalues of ܼܿ are
A. 1, 1, −1
B. 1, 0.5 + ݆j0.866, 0.5 − ݆j0.866
C. 1, −0.5 + ݆j0.866, −0.5 − ݆j0.866
D. 0, 1, −1
Q. 18 Choose the correct option
A. A
B. B
C. C
D. D
Q. 19 Choose the correct option
A. 0
B. 2
C. 4
D. 6
Q. 20 Let f(x) be a real, periodic function satisfying ݂f(-x)=-f(x) The general form of its Fourier series representation would be.
A. A
B. B
C. C
D. D
Q. 21 A resistance and a coil are connected in series and supplied from a single phase, 100 V, 50 Hz ac source as shown in the figure below. The rms values of plausible voltages across the resistance (VR) and coil (VC) respectively, in volts, are
A. 65, 35
B. 50, 50
C. 60, 90
D. 60, 80
Q. 22 The voltage (V) and current (A) across a load are as follows.
v(t) = 100sin(ωt),
i(t) = 10sin(ωt – 60∘) + 2sin(ωt) + 5sin(5ωt)
The average power consumed by the load, in W, is ________.
Q. 23 A power system with two generators is shown in the figure below. The system (generators, buses and transmission lines) is protected by six overcurrent relays R1 to R6. Assuming a mix of directional and nondirectional relays at appropriate locations, the remote backup relays for R4 are
A. R1, R2
B. R2, R6
C. R2, R5
D. R1, R6
Q. 24 A power system has 100 buses including 10 generator buses. For the load flow analysis using Newton-Raphson method in polar coordinates, the size of the Jacobian is
A. 189 x 189
B. 100 x 100
C. 90 x 90
D. 180 x 180
Q. 25 The inductance and capacitance of a 400 kV, three-phase, 50 Hz lossless transmission line are 1.6 mH/km/phase and 10 nF/km/phase respectively. The sending end voltage is maintained at 400 kV. To maintain a voltage of 400 kV at the receiving end, when the line is delivering 300 MW load, the shunt compensation required is
A. capacitive
B. inductive
C. resistive
D. zero
Q. 26 A parallel plate capacitor filled with two dielectrics is shown in the figure below. If the electric field in the region A is 4 kV/cm, the electric field in the region B, in kV/cm, is
A. 1
B. 2
C. 4
D. 16
Q. 27 A 50 MVA, 10 kV, 50 Hz, star-connected, unloaded three-phase alternator has a
synchronous reactance of 1 p.u. and a sub-transient reactance of 0.2 p.u. If a 3-phase short circuit occurs close to the generator terminals, the ratio of initial and final values of the sinusoidal component of the short circuit current is ______.
Q. 28 Consider a linear time-invariant system with transfer function
If the input cos(t) is and the steady state output is A cos(t+α) then the value of A is _________.on
Q. 29 A three-phase diode bridge rectifier is feeding a constant DC current of 100 A to a highly inductive load. If three-phase, 415 V, 50 Hz AC source is supplying to this bridge rectifier then the rms value of the current in each diode, in ampere, is _________.
Q. 30 A buck-boost DC-DC converter, shown in the figure below, is used to convert 24 V battery voltage to 36 V DC voltage to feed a load of 72 W. It is operated at 20 kHz with an inductor of 2 mH and output capacitor of 1000 μF. All devices are considered to be ideal. The peak voltage across the solid-state switch (S), in volt, is
Q. 31 For the network shown in the figure below, the frequency (in rad/s) at which the maximum phase lag occurs is, ___________
Q. 32 The direction of rotation of a single-phase capacitor run induction motor is reversed by
A. interchanging the terminals of the AC supply
B. interchanging the terminals of the capacitor
C. interchanging the terminals of the auxiliary winding
D. interchanging the terminals of both the windings
Q. 33 In the circuit shown below, the voltage and current sources are ideal. The voltage (Vout) across the current source, in volts, is
A. 0
B. 5
C. 10
D. 20
Q. 34 The graph associated with an electrical network has 7 branches and 5 nodes. The number of independent KCL equations and the number of independent KVL equations, respectively, are
A. 2 and 5
B. 5 and 2
C. 3 and 4
D. 4 and 3
Q. 35 Two electrodes, whose cross-sectional view is shown in the figure below, are at the same potential.
The maximum electric field will be at the point
A. A
B. B
C. C
D. D
Q. 36 Choose the correct option
A. A
B. B
C. C
D. D
Q. 37 For the circuit shown below, taking the opamp as ideal, the output voltage Vout in terms of the input voltages V1 , V2 and V3 is
A. 1.8V1 + 7.2V2 -V3
B. 2V1 + 8V2 – 9V3
C. 7.2V1 + 1.8V2 -V3
D. 8V1 + 2V2 – 9V3
Q. 38 Choose the correct option
A. 2B1
B. 2(B1+B2)
C. 4(B1+B2)
D. ∞
Q. 39 Choose the correct option
A. 0
B. 0.5
C. 1
D. 2
Q. 40 Answer is ___________
Q. 41 The line integral of the vector field F = 5xz î + (3x² + 2y) ĵ + x²z k ̂ along a path from (0,0,0) to (1,1,1) parametrized by (t,t²,t) is _____
Q. 42 Choose the correct option
A. A
B. B
C. C
D. D
Q. 43 Choose the correct option
A. 2, ଵ 2, ଵ 2,1/2
B. 4,1/2
C. 2,1/4
D. 4,1/4
Q. 44 The driving point input impedance seen from the source Vs of the circuit shown below, in Ω, is ______.
Q. 45 The z-parameters of the two port network shown in the figure are z11 = 40 Ω, z12 = 60 Ω, z21 = 80 Ω and z22 =100 Ω. . The average power delivered to Rl=20 Ω, in watts, is _______
Q. 46 In the balanced 3-phase, 50 Hz, circuit shown below, the value of inductance (L) is 10 mH. The value of the capacitance (C) for which all the line currents are zero, in millifarads, is ___________.
Q. 47 In the circuit shown below, the initial capacitor voltage is 4 V. Switch S1 is closed at t=0. The charge (in μC) lost by the capacitor from t= 25μs ro t= 100μs is _________.
Q. 48 The single line diagram of a balanced power system is shown in the figure. The voltage magnitude at the generator internal bus is constant and 1.0 p.u. The p.u. reactances of different components in the system are also shown in the figure. The infinite bus voltage magnitude is 1.0 p.u. A three phase fault occurs at the middle of line 2. The ratio of the maximum real power that can be transferred during the pre-fault condition to the maximum real power that can be transferred under the faulted condition is _________.
Q. 49 Choose the correct option
A. A
B. B
C. C
D. D
Q. 50 At no load condition, a 3-phase, 50 Hz, lossless power transmission line has sending-end and receiving-end voltages of 400 kV and 420 kV respectively. Assuming the velocity of traveling wave to be the velocity of light, the length of the line, in km, is ________.
Q. 51 The power consumption of an industry is 500 kVA, at 0.8 p.f. lagging. A synchronous motor is added to raise the power factor of the industry to unity. If the power intake of the motor is 100 kW, the p.f. of the motor is _____________
Q. 52 The flux linkage (λ) and current (i) relation for an electromagnetic system is λ = (√i)/g .When i = 2A and ݃g (air-gap length) = 10 cm, the magnitude of mechanical force on the moving part, in N, is ________.
Q. 53 The starting line current of a 415 V, 3-phase, delta connected induction motor is 120 A, when the rated voltage is applied to its stator winding. The starting line current at a reduced voltage of 110 V, in ampere, is _________
Q. 54 A single-phase, 2 kVA, 100/200 V transformer is reconnected as an auto-transformer such that its kVA rating is maximum. The new rating, in kVA, is ______.
Q. 55 A full-bridge converter supplying an RLE load is shown in figure. The firing angle of the bridge converter is 120º. The supply voltage Vm (t) = 200Π sin(100 Πt) V, R=20 Ω, E=800 V. The inductor L is large enough to make the output current IL a smooth dc current. Switches are lossless. The real power fed back to the source, in kW, is _______.
Q. 56 A three-phase Voltage Source Inverter (VSI) as shown in the figure is feeding a delta connected resistive load of 30 Ω/phase. If it is fed from a 600 V battery, with 180o conduction of solid-state devices, the power consumed by the load, in kW, is ________.
Q. 57 A DC-DC boost converter, as shown in the figure below, is used to boost 360V to 400 V, at a power of 4 kW. All devices are ideal. Considering continuous inductor current, the rms current in the solid state switch (S), in ampere, is _________.
Q. 58 A single-phase bi-directional voltage source converter (VSC) is shown in the figure below. All devices are ideal. It is used to charge a battery at 400 V with power of 5 kW from a source Vs = 220 V (rms), 50 Hz sinusoidal AC mains at unity p.f. If its AC side interfacing inductor is 5 mH and the switches are operated at 20 kHz, then the phase shift (δ) between AC mains voltage (Vs) an fundamental AC rms VSC voltage (VC1), in degree, is ________.
Q. 59 Choose the correct option
A. A
B. B
C. C
D. D
Q. 60 Choose the correct Option
A. A
B. B
C. C
D. D
Q. 61 Three single-phase transformers are connected to form a delta-star three-phase
transformer of 110 kV/ 11 kV. The transformer supplies at 11 kV a load of 8 MW at 0.8 p.f. lagging to a nearby plant. Neglect the transformer losses. The ratio of phase currents in delta side to star side is
A. 1 : 10√3
B. 10√3 : 1
C. 1 : 10
D. √3 : 10
Q. 62 Choose the correct option
A. 1
B. 2
C. 5
D. 9
Q. 63 Two identical unloaded generators are connected in parallel as shown in the figure. Both the generators are having positive, negative and zero sequence impedances of j0.4 p.u., j0.3 p.u. and j0.15 p.u., respectively. If the pre-fault voltage is 1 p.u., for a line-to-ground (L-G) fault at the terminals of the generators, the fault current, in p.u., is ______.
Q. 64 An energy meter, having meter constant of 1200 revolutions/kWh, makes 20 revolutions in 30 seconds for a constant load. The load, in kW, is _________.
Q. 65 A rotating conductor of 1 m length is placed in a radially outward (about the z-axis) magnetic flux density (B) of 1 Tesla as shown in figure below. Conductor is parallel to and at 1 m distance from the z-axis. The speed of the conductor in r.p.m. required to induce a voltage of 1 V across it, should be ____________.
| Answer Sheet |
||||||||||
| Question | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Answer | C | B | B | B | C | 120 | C | C | A | 7 |
| Question | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| Answer | B | A | 9.5 to 10.5 | D | 6 | B | D | A | B | B |
| Question | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Answer | D | 249 to 251 | D | A | B | C | 4.9 to 5.1 | 0.69 to 0.72 | 57 to 58 | 59.5 to 60.5 |
| Question | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 |
| Answer | 0.3 to 0.33 | C | D | D | A | D | D | B | D | 7 to 7.5 |
| Question | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 |
| Answer | 4.4 to 4.45 | D | A | 19.5 to 20.5 | 34 to 36 | 2.9 to 3.1 | 6.8 to 7.2 | 2.2 to 2.35 | C | 294 to 298 |
| Question | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 |
| Answer | 0.31 to 0.33 | 186 to 190 | 31 to 33 | 5.9 to 6.1 | 5.9 to 6.1 | 23 to 25 | 3 to 4 | 9.1 to 9.3 | A | B |
| Question | 61 | 62 | 63 | 64 | 65 | |||||
| Answer | A | A | 5.5 to 6.5 | 1.9 to 2.1 | 9.4 to 9.7 |