PWD Lineman Previous Question Paper Discussion| ITI Level Electrical Questions | Electrical EduZone

Added: 2026-05-31

[00:00:00]Hi all. Welcome to Electrical Education Zone.

[00:01:01]First question number The resistance of a copper wire to the flow of current through it.

[00:01:08]The resistance of copper wire to the flow of current through it increases as the diameter of the wire increases, decreases as the diameter of wire increases. So, that is it.

[00:01:29]The resistance increase or decrease?

[00:01:40]Increases as the diameter of the wire increases.

[00:01:47]Decreases as the diameter of the wire increases.

[00:01:59]Should be >> Option C not come increases as the length of the wire increases.

[00:02:05]Length of the wire increases and R increases.

[00:02:08]Decreases as the length of the wire increases. Option B and C are not.

[00:02:12]We're going to correct that and then we'll get option B and option C. So then you will get it.

[00:02:17]Kerala PSC option will be available.

[00:02:19]But option B and C are not available. So this question cancel and then I don't understand it.

[00:02:25]Okay.

[00:02:25]Second question not come.

[00:02:27]Which of the following material possesses the least resistivity? Least resistivity are going to be silver.

[00:02:36]Option B and the correct silver and least resistivity. Copper, silver, carbon, tungsten are the ones I am looking at.

[00:02:43]Third question not come.

[00:02:46]Temperature coefficient of a conductor is defined as the What is the temperature coefficient? I don't know.

[00:02:51]It is the increase in resistance per ohm per degree centigrade. Option D and okay. Option D and okay.

[00:03:01]Which of the following lamp has more resistance?

[00:03:06]More resistance. R is not P is not V squared by R. So R is not V squared by P. I don't know 250 V and V constant. I don't know.

[00:03:17]More resistance low power.

[00:03:21]I don't know 25 W 250 V.

[00:03:23]Option D and okay. Option D and okay. Option D and okay.

[00:03:29]The curve representing Ohm's law is Ohm's law is not V and I relation. I don't know. V and I relation I don't know.

[00:03:39]Linear and linear. I don't know.

[00:03:43]The conductivity of insulator Insulators and then I don't know very low conductivity and I don't know.

[00:03:52]Option C and okay. Option C and okay.

[00:03:55]>> If a 220 V heater is used in on 110 V supply, the heat produced by it will be as much.

[00:04:04]I'm going to be 110 squared by 220 squared.

[00:04:19]110 Option A on a Correct answer I don't even know okay.

[00:04:33]The Coulomb is a unit of Coulomb.

[00:04:38]Coulomb charge in the unit on the The quantity of electricity, the quantity of electricity I'm going to get a lot charge the unit of Coulomb.

[00:04:53]The quantity of electricity in the unit of current okay.

[00:05:02]Which of the following wire has the greatest cross-sectional area?

[00:05:07]Greatest cross-sectional area.

[00:05:11]SWG core one and then get I'm going to get that thickness number of the other guy and burn it down there.

[00:05:19]Thickness and then you go.

[00:05:21]High thickness I go and then I got it.

[00:05:26]I got it.

[00:05:27]I'm going to get a lot. Cross-sectional area high high on the way I got it I don't even know SWG that a lot. I don't know I don't know I don't know option A on a Correct answer I don't even know.

[00:05:41]I don't even know I don't even know I don't even know I don't even know I don't even know I don't even know I don't even know I don't even know I don't even know I don't even know.

[00:05:47]I don't even know I don't even know.

[00:05:50]>> A metallic sheet is provided over insulation to protect the cable from cable from A metallic sheet is provided over the insulation to protect the cable from metallic sheet and then I will come in there.

[00:06:13]moisture in there protect you have a good day to day Okay, option C and I will be in the middle.

[00:06:22]But then I will come over there mechanical injury in the middle of the room but the moisture on the right side of the room and then I According to Ohm's law, the relation between resistance, current, and voltage is stated as V is nothing but I into R and then R is nothing but V by R like I is nothing but V by R and then option D and I will come right at the end of the room.

[00:06:47]Which is inversely proportional to the resistance of conductor?

[00:06:51]R is nothing but a row into L by A inversely proportional to the room.

[00:06:55]area of the cross section But then I will come to the question which material is having negative temperature coefficient of resistance?

[00:07:08]In the end it don't know anything to do with the number there.

[00:07:13]Key to the thing in the mic and I will see You are a kid and I don't know what I'm talking about. Okay, you are a kid and I don't know what I I don't know what I'm talking about and then I will come in the middle.

[00:07:21]See, my kid and I will go to the middle of the room and then I will check it and I will come back.

[00:07:25]But then I will come to the question which law states that in a closed electric circuit, the applied voltage is equal to the sum of the voltage drops?

[00:07:35]Sum of the voltage law drop and then V1 plus V2 plus V3 and then I will come to the first law and the second law. I don't know KCL and I don't know KVL. I don't know.

[00:07:42]But then I will come to KCL and then I will come to current and then I will come to the voltage.

[00:07:54]>> What is the effect of electric current on battery charging?

[00:08:09]Which is used as a positive electrode in a dry cell?

[00:08:14]Dry cell number one in the positive electrode I think you see in the copper on the lithium on carbon on zinc on the carbon item positive electrode I think you see in the single negative item number you see in the single negative item carbon in the positive item number you see in the What is the name of the defect that bending of plates in the secondary cell in bending of plates on the buckling of option A on the order correct answer I don't know what I do Five cells are connected in parallel combination with an EMF of two voltage.

[00:08:54]The output voltage is parallel item parallel item number you see in the same item two voltage in the order number option D on the correct item number you see in the 18 number Why the vent plug is kept on kept open during the charging of a battery?

[00:09:09]I don't know what I do. Why the vent plug is kept open during the charging of the battery?

[00:09:20]Option C to escape the gas freely I don't know what I do.

[00:09:24]Uh vent I don't know what I do open item number you see in the number in the gases in the Uh I don't know what I do.

[00:09:31]Escape the gas freely. Okay.

[00:09:33]I don't know what I do charging the summit.

[00:09:36]Okay.

[00:09:38]I don't know what I do sedimentation in lead acid batteries occurs due to overcharging at high rated What will be the inductance when the iron of an iron core coil is removed to make it as a air core the coil?

[00:10:00]What will be the inductance when the iron of an iron core coil is removed to make it as an air core lowers the inductance of option B and the correct answer I don't even know the answer.

[00:10:23]What is the What is the SI unit of flux density?

[00:10:26]Flux density unit of Tesla and okay, option A and the correct.

[00:10:31]What is the similar term in magnetic circuit of conductance in electrical circuit?

[00:10:38]Conductance conductance of magnetic current magnetic circuit doubt permeability and but the permeability permeance and the option B and the okay, option B.

[00:10:55]The magnitude of force acting on a current carrying conductor placed in a magnetic field is independent of cross sectional area and independent of the okay.

[00:11:09]What is the unit of magnetic motor force? The MMF in the unit of ampere turns and option C and correct answer I don't even know the answer. 26 Which factor affects the polarity of electromagnet?

[00:11:27]Polarity depends on I don't even know the answer.

[00:11:31]Direction of the current option B and correct.

[00:11:36]Which is the cause for changing the permeability?

[00:11:50]And I think permeability I'm going to permeability varies with the magnetizing force.

[00:12:00]What is the effect on surrounding metal placed in a magnetic field?

[00:12:11]Eddy current and are induced in the The area of the hysteresis loss is a measure of energy loss energy loss that is area of the hysteresis loss energy loss per cycle Iron loss is also known as Iron loss Iron loss is the sum of hysteresis loss and eddy current loss And this is the sum of hysteresis loss and eddy current The unit of frequency is hertz.

[00:13:03]The effective value of an alternating current can be evaluated by Value of form factor of of an alternating current is It is nothing but 1.11 In a pure inductive circuit value of power factor is purely inductive circuit number of power factor on that zero on the other hand lagging on The equation of the equation for a capacitive reactance of an alternating current circuit is X is nothing but 1 by 2 pi FC option Method used for reducing the earth electrode resistance is connecting a number of earth electrodes in parallel I don't know what kind of multiple earth electrodes Power factor of an alternating current circuit is power factor is cos phi is nothing but R by Z cos phi is nothing but R by Z In an alternating current circuit the reactive power is reactive power VI cos phi power P is nothing but V into I on 39 in an alternating current circuit of frequency 50 Hz the time period is T is nothing but 1 by F on I put it as 1 by 50 point zero two option B sorry option C on the other hand correct answer on the other hand in a power triangle of alternating current circuit is apparent power is nothing but the vector sum of active power plus reactive power I think you can volt amperes is nothing but root of W squared plus R squared option A on correct answer on the other hand 41 Which rule is used to find the direction of induced EMF in a DC generator?

[00:15:11]generator in this case we are talking about generator and right hand rule G and G G and G on the other hand Fleming's right hand rule option C on the other hand on the other hand 42 Which type of DC generator works in the absence of a residual magnetism?

[00:15:31]Separately excited EMF equation of a DC generator 60A Option A.

[00:15:46]In the EMF equation, A denoted for EMF equation A denoted for number of parallel path in the armature.

[00:16:01]The combination of series field and shunt field within one generator.

[00:16:10]What is the purpose of compensating winding in a DC generator?

[00:16:40]Which of the following motor will be highest?

[00:16:45]Series motor But I don't want to do anything number that dangerously high speed Which type of DC motor is used for constant speed drives? Constant speed drives in DC shunt motor 49 Which speed control method offers the Can I put down my which speed control method offers the offers below the normal speed in a DC shunt motor?

[00:17:27]Armature control method, okay.

[00:17:31]Why the holding coil of a three-point starter is connected in series with the shunt field?

[00:17:38]To to protect the motor from a high speed, I don't know what I'm doing.

[00:17:41]Shunt field I am between one.

[00:17:49]On which factor the direction of rotation of three-phase motor rotor depends?

[00:17:57]I'm going to phase sequence of the supply to the stator field and depending on the option B and correct.

[00:18:03]I am between one. The torque of a three-phase induction motor depends upon the rotor resistance and I like that.

[00:18:11]Torque is directly proportional to the number of relay.

[00:18:19]Uh T equal to C 2 R 2 by root of R 2 square plus S X 2 square in the region.

[00:18:25]The upper rotor resistance on the correct answer, okay.

[00:18:38]I am between one. In a double cage uh double squirrel cage motor, the inner cage bars are made up of inner cage are in the I'm going to take a number.

[00:18:48]Lower resistance are going to upper lower resistance metals in the option.

[00:18:55]Copper in the region of the option B and lower resistance metals like copper and I tell you earlier.

[00:19:08]I am going to number of the inner cage in the number of the India lower resistance and I don't know what I'm running in the time of the upper lower.

[00:19:14]Uh If the capacitor in a capacitor shorted the fan will If the capacitor in a capacitor type of fan is shorted then the fan will number of different types of motors in capacitor I capacitor starting starting starting fan run option D A thermal overload relay is provided in a starter to protect the motor against thermal overload relay overload overload overload excess current overload and the protector and the overload overload and the overload excess current and the the thermal relay excess flow through C and the character Capacitor start and the capacitor run motors are used in capacitor start and the capacitor motors are used in >> start and the capacitor motors are using in refrigerator What is the function of centrifugal switch in induction motor?

[00:21:31]What is the function of centrifugal switch induction motor?

[00:21:33]To disconnect the I'm going to go over the biggest video centrifugal switch starting winding cut here.

[00:21:42]Disconnect you and I don't have to do this option B.

[00:21:45]I would like to The rotor current frequency in a slip ring induction motor depends on F2 is nothing but S in the amount of slip Which of the following statement is not true for the dynamometer type wattmeter? Not true in the question. Okay.

[00:22:14]Which of the following is Low torque to weight ratio correct on it.

[00:22:29]The scale is uniform correct on it.

[00:22:31]Used for both AC and DC correct on it.

[00:22:34]Non-uniform in the lower end of the option D correct on it in the lower end of it.

[00:22:39]In two wattmeter method of power measurement of reading one wattmeter is zero and other reads total power then the power factor will be in the quarter person of equal double zero negative above zero 30 60 90 above power factor one zero on the one cos 60 cos 60 in the one above I'm going to go ahead and get an option correct right here and then I'll go back.

[00:23:08]Go 60 and I will go 0.5 and okay equal to 0.5.

[00:23:17]Which of the following statement is correct for the permanent PMMC instrument?

[00:23:23]The scale of the permanent magnet moving coil instrument is uniform correct. The the deflecting torque of a PMMC instrument is directly proportional to the current passing through it to get the answer.

[00:23:37]That is correct. It is the AC and DC and the option A and option A are correct both one and two.

[00:23:44]I would like to know how many segments are available in LED display for LED display format for digital multimeter.

[00:23:52]How many segments are available in LED display format of digital multimeter?

[00:24:02]Seven segment analog.

[00:24:06]Okay, seven segment option C analog.

[00:24:11]What is the principle of dynamometer type instrument?

[00:24:20]The capacity of transformer are always rated by its KVA KVA apparent power by the way 480.

[00:24:30]Where the oil level indicator is typically fitted in distribution transformers?

[00:24:39]What is the ratio of composition of steel and silicon in transformer core?

[00:24:48]3% silicon and 27% steel option B analog.

[00:24:56]>> [snorts] >> What is the major disadvantage of an auto transformer?

[00:25:07]secondary from the primary circuit What is the purpose of the exploration went in power transformer?

[00:25:18]explosion went in the power pressure releasing explosion went in the release the internal pressure.

[00:25:29]The range of visual spectrum is Option D on the character visible spectrum.

[00:25:47]The avalanche of breakdown primarily depends on the phenomena of >> [snorts] >> collision See on the increases the performance of LED light.

[00:26:16]thermal management thermal management life in the LED the performance What is the full form of the abbreviation of COB?

[00:26:35]chip on board chip on board option A Which term is related to the information about the hue and saturation of a color?

[00:26:51]prominence of the option C the four energy gap for the German 0.72 electron volt 77 The valencies of phosphorus and silicon materials are >> [snorts] >> Phosphorus in the five element of silicon and the four element of Option B.

[00:27:18]Which of the following will serve as the donor impurity in silicon?

[00:27:22]Donor impurity in the case of ordering antimony and the ordering of option D 79 Which of the following diode shows the negative resistance region?

[00:27:34]Negative resistance region show the inner diode It will be the inner diode. Tunnel diode in the case of ordering of the inner The other tunnel diode and the negative region negative resistance region of working >> [snorts] >> 80 The most heavily doped region in transistor is base on the collector on the inner emitter on the emitter on the option C on the inner diode In hydroelectric power plant Pelton wheel is used for number of the KFP and low medium high in the region of the number of the code again in the inner diode and the upper Pelton wheel in the region of KFP Pelton high in the region of the inner Sorry, high head low low head medium head high head.

[00:28:20]I remember 82 which of the following is a non-conventional type of power generation? Non-conventional type of inner tidal power plant 80 83 of the question number Which device heats the feed water on its way to the boiler by deriving the heat from the flue gas in steam power plant?

[00:28:39]83 of the answer of the economizer on the Okay, economizer on the inner Economizer heats the feed water using the flue gas heater.

[00:28:48]>> [snorts] >> And what is the which device is the wind speed in the windmill? It's not a wind governor. And what is that?

[00:29:03]What is the function of condenser in steam power plant?

[00:29:06]It creates a very low pressure at the exhaust turbine. The condensed steam can be used as a feed water to the boiler.

[00:29:12]Both A and B. And what is that?

[00:29:16]And what is that in the answer in the a dam like structure built across the entrance?

[00:29:25]Bar Okay. And what is that? Which of the following statement is correct?

[00:29:30]>> [snorts] >> Cadmium control Cadmium is used as a control rod. It's correct.

[00:29:35]Moderator slows down the neutrons before they burn.

[00:29:43]Both one and two. And And what is that?

[00:29:45]Both one and two are correct.

[00:29:52]What is the function of surge tanks in the hydroelectric power plant?

[00:29:56]Surge tank and the pressure might lead to that. To limit the abnormal pressure in the penstock.

[00:30:02]>> [snorts] >> And what is that? Which of the following statement is correct?

[00:30:09]The correct one.

[00:30:16]The option A and the correct one. And what is that? Option A and the correct one. The heat produced by 1 kg nuclear fuel is equal to that produced by 1 kg nuclear fuel and 1,000 tons of coal. And what about And what is that?

[00:30:35]2,750 tons of coal. Option A and the correct one. And what is that? Okay.

[00:30:42]And what is that? 1 kg of nuclear fuel 1000's of tons of coal are on >> [snorts] >> From which element in the distribution system the tapping are taken for giving the electric supply to the customers.

[00:31:10]>> [snorts] >> Why the voltage of the electric supply is stepped up using the transformer for long distance AC transmission?

[00:31:26]Better and the option D and the higher voltage will make the cost of the supply cheaper in the leading.

[00:31:34]Which statement is correct about AC and DC transmission?

[00:31:38]>> [snorts] >> There are no skin effect in DC transmission.

[00:31:47]AC transmission.

[00:31:57]Okay, above option.

[00:32:00]One and three are there. Option one and three. Above option C and the correct.

[00:32:04]Okay.

[00:32:11]Option C [snorts] and the correct answer above.

[00:32:16]Which insulator is used for mounting drop out fuses?

[00:32:23]Post insulator. Okay. What is the full form of ACSR? Aluminum conductor steel reinforced. Option B.

[00:32:31]Up to which type Up to which voltage the pin type insulators are used? Pin type in the range in the right now >> [snorts] >> option C What is the minimum clearance between the live wires on the same side of supporting the horizontal configuration of conductors?

[00:32:51]>> [snorts] >> A transmission line is called as a long transmission line when its length is more than 150 km >> [snorts] >> What should be the depth of pit for a 9-m long line support?

[00:33:25]approximately >> [snorts] >> What is the permitted variation of declared supply voltage to the consumers in the case of high voltage?

[00:33:55]Okay.

[00:34:03]Okay, thank you.