HomeFor all AE/JE EE examTop 40 electrical que and ans Top 40 electrical que and ans Education April 15, 2023 0 1➤ Two quadrant type B chopper operates in: 2nd and 4th quadrants3rd and 4th quadrants1st and 4th quadrants 1st and 2nd quadrants2➤ Which of the Following is NOT a characteristic of PMMC instruments? . High accuracyNon-uniform scaleNo hysteresis lossUsed for DC measurements only3➤ Exponential signal is an example of Random and non-periodic signal.Random and periodicDeterministic and periodicDeterministic and non-periodic4➤ Which of the following method of tariff was proposed by John Hopkinson? . Block meter rateFlat demand rateTwo part tariffThree part tariff5➤ How is the transient current in a loss free RLC circuit ? SinusoidalSquare wave Non- oscillatingOscillating6➤ Amplitude of antisymmetric signal is--------at the origin Always negative Always zeroAlways positiveEither positive or negative but not zero7➤ Which of the following is true for gravity control as a controlling force for measuring instruments? .The instrument need not be levelledIt is dependent of temp variationsIt can be used only in vertically mounted instrumentsSince deflection is directly proportional to the current it has a uniform scale. 8➤ What is the unit of measurement used to measure the air gap between the rotor and stator of the starter motor? MilAngstromPlank lengthMillimetre9➤ Which of the following is NOT true for the shell type transformer? magnetic circuit is divided in two or more partsThe coils used are of cylindrical typeBoth HV and LV windings are placed on a central limbA core has three limbs10➤ Which of the following CANNOT be a cause for the creeping error in induction type single-phase energy meter? VibrationStray magnetic fieldsOver-compensation for frictionExtremely low voltage across the potential coil 11➤ Identify the non-renewable source of energy among the given option. Biomass energySolar energyGeothermal energyNuclear energy12➤ Calculate the resolution of a 3-digit 0-1 V digital voltmeter. 0.010.00010.0010.113➤ In an oil circuit breaker, due to heat the oil decomposes and the gases are liberated. Which of the following gas is usually NOT liberated in this process? AmmoniaHydrogenMethaneAcetylene14➤ In a hollow tube, if the velocity of air is constant everywhere inside the tube then the divergence of the velocity field is UnityZeroNegativeInfinite15➤ As per force-voltage analogy, mass and viscous friction in mechanical translational system are analogous to______and______in electrical system, respectively. Capacitance, inductanceResistance, capacitanceInductance, resistanceInductance, capacitance 16➤ For a second order system having its transfer function as: H(s) = 25/(s²+8s+25) Find the damping factor. 0.80.40.50.617➤ Which of the following device is bidirectional? PUTDIACSUSSCS18➤ A power plant has the annual factors given as: load factor = 70 percent, Capacity factor = 50 percent, Use factor = 60 percent. If maximum demand is 20 MW, find the reserve capacity over and above the peak load. .28 MW14 MW 8 MW6 MW19➤ What is advantage of high voltage transmission lines? Increasing voltage is not an advantage at all because it involves expensive equipment to step up voltage initially and then step down later increasing the voltage reduces the current in transmission and distribution lines reducing the distribution lossesincreasing voltage leads to higher current which in turn leads to bulk carriage of power over long distances None of these20➤ Which of the following theorems is used to identify the resistance of the speaker that must be matched to the audio power amplifier to obtain the highest output? . Millman's TheoremMaximum Power Transfer theorem (mppt)Compensation TheoremReciprocity Theorem21➤ What is the current through an element at t=2 sec, if the charge entering the element is q = 10 t C? 10 A10t² A 5t² A 20 A 22➤ In an HVDC system: both generation and distribution are ac.generation is dc and distribution is acgeneration is ac and distribution is dcboth generation and distribution are dc23➤ In double cage Induction motor, rotor is so designed to provide Low starting torque, with high starting current.High starting torque, with low starting currentHigh starting torque, with high starting current.Low starting torque, with low starting current.24➤ Wein bridge finds application in Resistance measurement only Frequency determinationHarmonic distortion analyserb and C both.25➤ In series-parallel combination of resistance, the minimum number of resistance required is threefourtwoone26➤ is measure of closeness in shape between a waveform and its fundamental component. . Distortion factorLowest order harmonicsHarmonic factorTotal harmonic distortion27➤ __of a conductor is a very high amplitude, low- frequency type of conductor motion and occurs mainly in areas of relatively flat terrain under freezing rain and icing of conductors. Resonant vibrationGalloping vibrationWake induced oscillationAeolian vibration28➤ A power amplifier supplies 50 W to an 8 2 speaker. Find ac output voltage and ac output current..12.5 V. 4 A50 V, 1 A1.25 V, 2 A2.20 V, 2.5 29➤ Which one of the following (A.C.S.R) conductors is having lowest cross-sectional area? DogZebraPantherDeer30➤ To reduce commutation difficulties universal motor are designed with Moderate magnetic fieldVery strong magnetic fieldWeak magnetic fieldCommutation problem does not depend on strength of magnetic field31➤ Convert (B68)16 in to equivalent octal number. (5050)(5555)(5550)(4550)32➤ Which of the following statements is true for the synchronous motor? Requires DC excitation at rotorEconomical for speeds above 600RPMSpeed decreases with loadOperate at lagging power factor33➤ The lines of force due to charged particles are sometimes curved.always straightalways curvedNone of these34➤ Which of the following characteristic is not desirable in measuring instrument? AccuracyDriftRepeatabilityLinearity 35➤ Which of the following device does not belong to thyristor family?GTORCTUJTSITH36➤ In a magnetic circuit, the ratio of flux to m.m.f represents ReluctanceResistanceReactancePermeance37➤ Which of the following is not a VALID advantage of digital filters over analog filters? . Higher bandwidthLess maintenanceLinear phase response Higher flexibility 38➤ A single phase full bridge inverter has a supply voltage of 100 V dc. What will be the peak reverse blocking voltage of each thyristor? .400 V200 V 100 V50 V 39➤ The breakaway points of the root-loci of a polynomial equation can occur On imaginary axis onlyAt origin onlyAnywhere on the complex plane On real axis only40➤ With the help of____the surface integral can be converted into a volume integral. Coulomb's lawMaxwell's theoremGauss's lawDivergence theorem SubmitYour score is Tags For all AE/JE EE exam Newer Older