question stringlengths 13 226 | subject stringclasses 1
value | choices listlengths 4 4 | answer class label 4
classes |
|---|---|---|---|
A working diode must have | electrical_engineering | [
"High resistance when forward or reverse biased",
"Low resistance when forward biased, while high resistance when reverse bias",
"High resistance when forward biased, while low resistance when reverse bias",
"Low resistance when forward or reverse biased"
] | 1B |
One of the following is the primary function of an oscillator | electrical_engineering | [
"produces sinusoidal oscillations",
"generates non sinusoidal waveforms",
"generates sustained oscillations at a constant amplitude and specific frequency",
"none of the above"
] | 2C |
In force-current analogy, electrical analogous quantity for displacement (x) is | electrical_engineering | [
"voltage.",
"inductance.",
"capacitance.",
"flux."
] | 3D |
Feedback circuit in an oscillator can be accomplished by | electrical_engineering | [
"Resistive coupling between input and output",
"Capacitive coupling between input and output",
"Inductive coupling between input and output",
"Any one or combinations of the above methods"
] | 3D |
Lowest critical frequency is due to zero and it may be present at the origin or nearer to the origin, then the type of network is | electrical_engineering | [
"LC circuit.",
"RC circuit.",
"RLC circuit.",
"RL Circuit."
] | 3D |
What is the value of dielectric constant of air? | electrical_engineering | [
"Less than 1",
"0.",
"1.",
"none of these."
] | 2C |
Temperature variation is a/an | electrical_engineering | [
"Digital quantity",
"Analog quantity",
"Either Digital or Analog quantity",
"None"
] | 1B |
The illumination at a point 5 meters below a lamp in 6 lux. The candle power of the lamp is | electrical_engineering | [
"30",
"140.",
"150.",
"200."
] | 2C |
What is the name of the fluorescent material that gives red colour fluorescence? | electrical_engineering | [
"Zinc silicate.",
"Calcium silicate.",
"Zinc sulphide.",
"Magnesium silicate."
] | 3D |
The change of cross sectional area of conductor in magnetic field will affect | electrical_engineering | [
"reluctance of conductor.",
"resistance of conductor.",
"(A) and (B) both in the same way.",
"none of above."
] | 2C |
Speed of data transmission in 4-G network of telecom is | electrical_engineering | [
"386 kbps - 2 mbps.",
"2 mbps.",
"2 mbps – 1 gbps.",
"100 mbps - 1 gbps."
] | 3D |
Electrical analogous quantity for spring element (K) in force-voltage analogy is | electrical_engineering | [
"L",
"R",
"1/C",
"C"
] | 2C |
Which of the following oscillators are used for low frequency (LF) applications | electrical_engineering | [
"LC oscillators",
"RC oscillators",
"Both LC and RC Oscillators",
"None"
] | 1B |
Relative error is same as | electrical_engineering | [
"ratio of absolute error and true value.",
"absolute error.",
"true error.",
"none of the above."
] | 0A |
If holding current of a thyristor is 2 mA then latching current should be | electrical_engineering | [
"0.01 A.",
"0.002 A.",
"0.009 A.",
"0.004 A."
] | 3D |
In an intel 8085A, which is the first machine cycle of an instruction? | electrical_engineering | [
"An op-code fetch cycle",
"A memory read cycle",
"A memory write cycle",
"An I/O read cycle"
] | 0A |
Which of the following are the disadvantages of a closed loop control system? | electrical_engineering | [
"Reduces the overall gain.",
"Complex and costly.",
"Oscillatory response.",
"All of the above."
] | 3D |
The magnetisation and applied field in ferromagnetic materials are related | electrical_engineering | [
"sinusoidally.",
"non linearly.",
"linearly.",
"parabolically."
] | 1B |
A metal surface with 1 meter radius and surface charge density of 20 coulombs / m2 is enclosed in a 10 m side cube. The total outward electric displacement normal to the surface of the cube is | electrical_engineering | [
"40π coulombs.",
"80π coulombs.",
"10π coulombs.",
"none of these."
] | 1B |
In binary number system the first digit (bit) from right to left is called as | electrical_engineering | [
"LSB, Least Significant Bit",
"MSB, Most Significant Bit",
"First Bit",
"Last Bit"
] | 0A |
In two wattmeter method of power measurement if the total power is measured by one wattmeter only then power factor of the system is | electrical_engineering | [
"0.",
"0.5.",
"1.",
"none of above."
] | 1B |
A 0 - 100 V voltmeter has a guaranteed accuracy of 2 % of full scale reading. The voltage measured by the voltmeter is 75 V. The limiting error is in percentage | electrical_engineering | [
"3.33 %.",
"2.66 %.",
"2 %.",
"1 %."
] | 1B |
Commutator in DC generator is used for | electrical_engineering | [
"collecting of current",
"reduce losses",
"increase efficiency",
"convert AC armature current in to DC"
] | 3D |
The ROM programmed during manufacturing process itself is called | electrical_engineering | [
"MROM",
"PROM",
"EPROM",
"EEPROM"
] | 0A |
In 8085 name/names of the 16 bit registers is/are | electrical_engineering | [
"stack pointer.",
"program counter.",
"both A and B.",
"none of these."
] | 2C |
The number of rings in the Bohr model of any element is determined by what? | electrical_engineering | [
"Column number on periodic table.",
"Atomic mass.",
"Row number on periodic table.",
"Atomic number."
] | 2C |
If P is the power of a star connected system then what will be power of an equivalent delta connected system? | electrical_engineering | [
"P",
"3P",
"P/3",
"None of the above"
] | 0A |
1 F is theoretically equal to | electrical_engineering | [
"1 ohm of resistance",
"ratio of 1 V to 1 C",
"ratio of 1 C to 1 V",
"none of these"
] | 2C |
If all the elements in a particular network are linear, then the superposition theorem would hold, when the excitation is | electrical_engineering | [
"DC only",
"AC only",
"Either AC or DC",
"An Impulse"
] | 2C |
The feedback factor of a Wien bridge oscillator using Op-Amp is | electrical_engineering | [
"1/3",
"1/4",
"1/2",
"1"
] | 2C |
Which of the following is not a sinusoidal oscillator? | electrical_engineering | [
"LC oscillator",
"RC phase shift oscillator",
"Relaxation oscillator",
"Crystal oscillator"
] | 2C |
How many entries will be in the truth table of a 3 input NAND gate ? | electrical_engineering | [
"3",
"6",
"8",
"9"
] | 2C |
In decimal number system what is MSD | electrical_engineering | [
"First digit from left to right",
"First digit from right to left",
"Middle digit",
"Mean of all digits"
] | 0A |
Inintel 8085A microprocessor ALE signal is made high to | electrical_engineering | [
"Enable the data bus to be used as low order address bus",
"To latch data D0-D7 from data bus",
"To disable data bus",
"To achieve all the functions listed above"
] | 0A |
For an SCR gate cathode characteristic is a straight line of 130. For triggered source volume of 15 V and allowable gate power dissipation of 0.5 W compute the gate source resistance? | electrical_engineering | [
"111.9 ohm",
"11.19 ohm",
"108 ohm",
"115 ohm"
] | 0A |
While operating on variable frequency supplies, the AC motor requires variable voltage in order to | electrical_engineering | [
"protect the insulation.",
"avoid effect of saturation.",
"improve the capabilities of the inverter.",
"protect thyristor from dV / dt."
] | 1B |
The supply frequency usually employed for high frequency eddy current heating is | electrical_engineering | [
"1 KHz.",
"5 KHz.",
"10 MHz.",
"10 KHz to 400 KHz."
] | 3D |
Electric drive is becoming more and more popular because | electrical_engineering | [
"all of below.",
"it provide smooth and easy control.",
"it is cheaper in cost.",
"it is simple and reliable."
] | 0A |
The voltage induced in an inductor is represented as, | electrical_engineering | [
"product of its inductance and current through it.",
"ratio of its inductance to current through it.",
"ratio of current through it to its inductance.",
"product of its inductance and rate of change of current through it."
] | 3D |
If a Hexadecimal number needs to convert to binary. For each hexadecimal digit, there will be how many bits | electrical_engineering | [
"1",
"2",
"4",
"8"
] | 2C |
Induction heating takes place in | electrical_engineering | [
"conducting but non-magnetic materials.",
"conducting materials which may be either magnetic or non-magentic materials.",
"insulating materials.",
"conducting and magnetic materials."
] | 1B |
In a lap winding dc machine number of conductors are 100 and number of parallel paths are 10. Find the average pitch | electrical_engineering | [
"10",
"100",
"50",
"1"
] | 0A |
Speed control by variation of field flux results in | electrical_engineering | [
"constant power drive.",
"constant torque drive.",
"variable power drive.",
"none of the above."
] | 0A |
A sinusoidal signal is analog signal, because | electrical_engineering | [
"it can have a number of values between the negative and positive peaks",
"it is negative for one half cycle",
"it is positive for one half cycle",
"it has positive as well as negative values"
] | 0A |
FM stands for | electrical_engineering | [
"frequent modulation.",
"frequency modulation.",
"frequency moderator.",
"frequent moderator."
] | 1B |
Stack is also known as | electrical_engineering | [
"FIFO memory",
"Flash memory",
"LIFO memory",
"LILO memory"
] | 2C |
In Ward-Leonard system, the lower limit of the speed imposed by | electrical_engineering | [
"Field resistance.",
"Armature resistance.",
"Residual magnetism of the generator.",
"None of above."
] | 2C |
An SCR has half cycle surge current rating of 3000 A for 50 Hz supply. One cycle surge current will be | electrical_engineering | [
"1500 A.",
"6000 A.",
"2121.32 A.",
"4242.64 A."
] | 2C |
Two infinite parallel metal plates are charged with equal surface charge density of the same polarity. The electric field in the gap between the plates is | electrical_engineering | [
"same as that produced by one plate.",
"double the field produced by one plate.",
"dependent on coordinates of field points.",
"zero."
] | 3D |
Which of the following is/are the disadvantages of an open loop control system? | electrical_engineering | [
"Inaccurate.",
"Unreliable.",
"both A and B.",
"none of the above."
] | 2C |
A diode (p-n junction) when reverse biased act as | electrical_engineering | [
"On Switch",
"Zener diode",
"Capacitor",
"Off Switch"
] | 3D |
A combinational PLD with a fixed AND array and a programmable OR array is called a | electrical_engineering | [
"PLD",
"PROM",
"PAL",
"PLA"
] | 1B |
Voltage controlled oscillators are used commonly in | electrical_engineering | [
"Pulse Modulators Frequency Modulators Phase Clocked loops",
"Frequency Modulators",
"Phase Clocked loops",
"All the above"
] | 3D |
The moving coil-meters, damping is provided by | electrical_engineering | [
"the aluminium frame of the coil.",
"the coil spring attached to the moving.",
"eddy current disk.",
"damping vane in the airtight chamber."
] | 0A |
Which of the following is the analogous quantity for mass element in force-voltage analogy? | electrical_engineering | [
"Resistance.",
"Inductance.",
"Capacitance.",
"All of the above."
] | 1B |
A latch is ________ sensitive | electrical_engineering | [
"both level and edge",
"edge",
"level",
"None"
] | 2C |
What is used to protect the SCR from over current ? | electrical_engineering | [
"CB and fuse.",
"Heat sink.",
"Snubber circuit.",
"Voltage clamping device."
] | 0A |
Electrical analogous quantity for dash-pot in force-current analogy is | electrical_engineering | [
"resistance.",
"conductance.",
"inductance.",
"capacitance."
] | 1B |
The main advantage of dielectric heating is that | electrical_engineering | [
"heating occurs in the material itself.",
"heating occurs due to high frequency.",
"it can be used for drying the explosives.",
"None of the above."
] | 0A |
Four identical alternators each are rated for 20 MVA, 11 KV having a subtransient reactance of 16% are working in parallel. The short circuit level at the busbar is | electrical_engineering | [
"500 MVA",
"400 MVA",
"125 MVA",
"100 MVA"
] | 0A |
A three-state buffer has the following output states | electrical_engineering | [
"1, 0, float",
"High, Low, Float",
"Both A and B",
"Set, Reset, Halt"
] | 2C |
The resistance of a conductor of diameter d and length l is R Ω. If the diameter of the conductor is halved and its length is doubled, the resistance will be | electrical_engineering | [
"R Ω",
"2R Ω",
"4R Ω",
"8R Ω"
] | 2C |
A single phase full bridge inverter can operated in load commutation mode in case load consist of | electrical_engineering | [
"RL.",
"RLC underdamped.",
"RLC overdamped.",
"RLC critically damped."
] | 1B |
A microprocessor is ALU | electrical_engineering | [
"and control unit on a single chip.",
"and memory on a single chip.",
"register unit and I/O device on a single chip.",
"register unit and control unit on a single chip."
] | 3D |
Deflection method direct measurements are most widely used as these are | electrical_engineering | [
"least time consuming.",
"most simple.",
"most simple and least time consuming.",
"most accurate."
] | 2C |
LC oscillators are used for produce a waveform with frequency ranging from | electrical_engineering | [
"1MHz to 500 MHz",
"100 KHz to 500 MHz",
"1 KHz to 1 MHz",
"1MHz to 100 GHz"
] | 0A |
A long wire composed of a smooth round conductor runs above and parallel to the ground (assumed to be a large conducting plane). A high voltage exists between the conductor and the ground. The maximum electric stress occurs at | electrical_engineering | [
"lower surface of the conductor.",
"upper surface of the conductor.",
"the ground surface.",
"midway between the conductor and ground."
] | 0A |
Which of the following is a digital device | electrical_engineering | [
"Regulator of a fan",
"Microphone",
"Resistance of a material",
"Light switch"
] | 3D |
Instantaneous power in inductor is proportional to the | electrical_engineering | [
"product of the instantaneous current and rate of change of current.",
"square of instantaneous current.",
"square of the rate of change of current.",
"temperature of the inductor."
] | 0A |
Five capacitors each of 5 µF are connected in series, the equivalent capacitance of the system will be | electrical_engineering | [
"5 µF",
"25 µF",
"10 µF",
"1 µF"
] | 3D |
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