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If x = a(θ + sin θ) and y = a(1  cos θ), then dy/dx will be equal to _____
A coin is tossed 4 times. What is the probability of getting heads exactly 3 times?
The eigen values of a matrix A are 1, 2 and 3. The eigen values of 3I  2A + A^{2} are _____
In 'ABCD' parameters of a two port network,the condition for reciprocity is ____
The equivalent resistance across terminals A & B of the circuit shown in below figure is____
In a 2^{nd} order system, the peak over shoot is 100%, the value of damping factor is _____
For a stable system GM and PM respectively, are
The most efficient method of damping is
Two resistance 100 ± 5 Ω and 200 ± 10 Ω are connected in series. If the deviations are standard deviations, the resultant resistance is _____
A current transformer has a rating of 100/5 A. Its magnetizing and loss components of exciting current are 2 A and 1 A respectively and secondary winding burden is purely resistive, its transformation ratioat rated current is _____
In the logic circuit shown in below figure, if A = 0 & B = 1 then possible values of C & X respectively
Which of the following logic gates use least power
In an FETas V_{GS} increasing in reverse bias, the value of g_{m}
Two parallel infinite filamentary wires carrying equal currents and separated by ‘2h’ distance. If the currents are in opposite direction to each other, then the magnitude of magnetic field at the centre of twoconductors is______
If a plot of signal x(t) is as shown in the below figure,
then the plot of the signal x(1 t) will be
x(1 +t ) is the shifted version of x(t) towards left by one unit. x(1  t) is the mirror image of x(1 + t) along vertical axis.
The z transform of the sequence (a^{k}) for k > 0 is _____
A river has a discharge of 400 liters/sec and the available head is 80 m. If the machine efficiency is 87%, the power delivered is
Corona loss of a 400 kV, 75 Hz transmission is 4800 W. The corona loss of the system,for 25 Hz, 400 kV input will be_______
Choose the incorrect statement related to SF_{6} gas
The number of parallel paths in a 4 layer, 8 pole wave winding d.c. machine is
In a dc machine 4 pole lap winding is used. The number of parallel paths are? In lap winding number of parallel paths = number of poles = 4. For Wave winding it will be equal to 2.
A d.c, differentia! compound generator acts as
The maximum efficiency of a 50 KVA transformer having iron loss of 450 W and full load copper loss as 800 W occurs at
The main advantage of universal motor is
The power electronic device can be used incurrent source inverter (CSI) is_____________
In the circuit shown in below if Th1 has turnoff period as 32 μs, the suitable value of capacitor is _______
The values of a, b and c such that is irrotational, are, respectively
In a unsymmetrical transmission system the distance between conductors ab, be and ca is 3 m, 4 m and 5 m respectively. The radius of each conductor is 2 cm. Thecapacitance of each phase is _______
The network A in figures (a) and (b) is a passive and contains only linear resistors. The currents in figure (a) are as marked. The value of lx in figure (b) is _______
A system has a transfer function G(s) = Value of “ω” at which imaginary magnitude is zero is _________
A portion of the polar plot of an openloop transfer function is shown in the figure:
The phase margin and gain margin will be respectively
A control system is represented in state space as shown in below:
The transfer function
A 50 V range spring controlled, electrodynamic voltmeter having a square law scale response takes 0.05 A on d.c. for full scale deflection of 90°. The control constant is 0.5 x 10^{6} Nm/degree and the initial mutual inductance of the instrument is 200 mH. The total mutual inductance at90° deflection is
The meter constant of a 230 V, 10 A watt hour meter is 1800 revolutions/kWh. The meter is tested at half load and rated voltage and unity p.f. The meter is found to make 80 revolutions in 138 sec. The meter error athalf load is _______
If a counter having 10 FFs attains 0 with 1^{st} dock pulse, the count of counter after 2060 pulses is____________
In a 8085 microprocessor after execution of ‘RIM’ instruction if the contents of accumulator is 49 H, then
Consider the circuit shown in below. The input impedance of the OPAMP is _____
A common emitter amplifier with an external capacitor C_{c} connected across the base and collector of transistor as shown in below figure.
The transistor g_{m} = 5 mA/V and r_{π} = 20 kQ. In its equivalent representation if the input capacitance and the output capacitance are observed as 52 pF and 25.5 pF respectively, then the upper cutoff frequency of the amplifier is ______
A magnetic field exists at a point. If a charge moving with a velocity experiences no force at that point. Then the component of electric field at that point is ______
Consider a random sinusoidal signal x(t) = where a random variable is uniformly distributed in the range ±π/2. The mean value of x(t) is
Consider the circuit shown in below figure The Thevinin’s zero sequence impedance at point ‘A’ is ______
A 50 Hz, transmission line has parameters per km as R = 0.3 Ω, L = 1.5 mH, G = 0.01 C = 0.1 μF. The characteristic impedance of the line is _______
A synchronous generator is rated 500 MVA, 21 kV, 0.85 lag P.F. It has synchronous reactance of 1.0 Ω. While generator feeding full load at 0.85 P.F. lagging at rated voltage, the excitation emf per phase of the generator is ______
A 200/400 V, 50 Hz transformer data of the o.c. test is given as 200 V, 0.8 A, 56 W on LV side. The magnetizing reactanceequivalent of the transformer is
In a test for the determination of the losses of 400 V, 50 Hz transformer, the total iron losses were found to be 2500 W at normal voltage and frequency. When the applied voltage and frequency were reduced to 250 V, 25 Hz, the total iron losses were found to be 1000 W. The hysterisis losses at normalvoltage and frequency is ______
An 8 pole, 50 Hz, slipring induction motor has effective rotor resistance of 0.10 Ω/phase and its stalling speed is 600 rpm. The resistance to be inserted in rotor phase to obtain maximum torque at starting, by ignoring the magnetizing current and statorleakage impedance is
A single phase full bridge inverter has RlC load of R = 4 Ω, L = 35 mH and C = 155 μF. The dc input voltage is 230 V and output frequency is 50 Hz. The 3^{rd} harmoniccomponent in load current is _____
The Norton's equivalent impedance acrossterminals A and B is ______
The Thevenin s equivalent voltage across the terminals A and B is _____
A 200 V shunt motor with shunt resistance of 40 Ω and armature resistance of 0.02 Ω takes a current of 55 A and runs at 850 rpm, when there is a resistance of 0.58 Ω in series with, armature.
Q.
Torque remaining the same, to raise the speed to 750 rpm the resistance to be added in armature is ______
A 200 V shunt motor with shunt resistance of 40 Ω and armature resistance of 0.02 Ω takes a current of 55 A and runs at 850 rpm, when there is a resistance of 0.58 Ω in series with, armature.
Q.
If the load torque is reduced such that motor armature current is 25 A, then the speed of the motor is ______
The element Y_{33} of admittance bus is ______
The active power (P) of bus 3 is _____
The speed of a 220 V, 20 A, 1000 rpm separately motor is controlled using a step down chopper. Input of the chopper is 250 V, armature resistance of motor are 1 Ω. If duty ratio of the chopper is 0.8 and average current is 16 A.
Q.
The speed of the motor is _____
The speed of a 220 V, 20 A, 1000 rpm separately motor is controlled using a step down chopper. Input of the chopper is 250 V, armature resistance of motor are 1 Ω. If duty ratio of the chopper is 0.8 and average current is 16 A.
Q.
With above speed, duty ratio of chopper is 0.75 the torque developed by the motor is ____
Direction: The following item consists of a word in capita! letters, followed by four words or groups of words. Select the word or group of words that is most nearly in meaning to the word in capital letters.
QUIESCENT
Direction: The following item consists of a word In capital letters, followed by four words or groups of words. Select the word or group of words that is most nearly opposite in meaning to the word in capital letters.
CONSANGUINE
Direction: In the following question, some parts of the sentence have been jumbled up. You are required to rearrange these parts which are labelled, P, Q, R and S to produce the correct sentence. Choose the proper sequence and mark in your Answer Sheet accordingly.
Q.
The preference
Which one of the following is the correct sequences?
If log_{27}x + log_{9}x + log_{3}x = 11, the value of x is ____
The letters of word ANIRUDH are arranged in such that no two of the vowels should come to together. The total number of arrangements are ______
Direction: The following question, a related pair of word is followed by four pairs of words. Select the pair that best expresses a relationship similar to that expressed in the original pair.
PROMPTU : REHEARSAL
Direction: Look at the italicized part of the sentence. Below the sentence is given three substitutions for the italicized part. If one of them (a), (b) or (c) is better than the italicized part, indicate your response on the Answer Sheet against the corresponding letter (a), (b) or (c). If none of the substitutions improve the sentence, indicate (d) as your response on the Answer Sheet.
Thus a 'No improvement’ response will be signified by the letter (d).
Q.
I would prefer to jog to walking.
The unit digit number is 18^{18} x 19^{21} x 13^{11} x11^{13} x21^{24} is ______
How much percentage more than the cost price should a shopkeeper mark his goods, so that after allowing a discount of 12.5%, he should have a gain of 5% on cost price,
18 docs208 tests

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