Electrical Dost

Quiz

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Electrical Earthing MCQ

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The earthing wire should have

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What should be the value of earthing resistance for large power stations?

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What is the main purpose of earthing?

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Which of the following is/are methods of earthing?

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Earth electrode used in Plate Earthing is a

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The materials used in plate earthing are

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The main drawback of plate earthing is

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The size of plate electrode (in inches) used in plate earthing is

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The minimum length of pipe electrode used for earthing should not be less than

10 / 10

While installing pipe earthing a rock is encountered then the rod shall be driven at an angle of

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The average score is 90%

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Basic Electrical Engineering MCQ

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Which of the following elements of electrical engineering cannot be analyzed using Ohm’s law?

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What is constant for a charged spherical shell according to basic electrical energy?

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Where does electro-static shielding occur in a charged spherical shell?

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According to the fundamentals of electrical engineering, which of these is a correct representation of peak value in an AC Circuit?

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Which of these according to fundaments of electrical energy is correct about alternating current?

6 / 21

How many cycles will an AC signal make in 2 seconds if its frequency is 100 Hz?

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What will be the direction of the drift velocity of electrons change with respect to the electric field?

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What will be the current density of metal if a current of 30A is passed through a cross-sectional area of 0.5m2?

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Which of the following is correct about the power consumed by R1 and R2 connected in series if the value of R1 is greater than R2?

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According to electrical engineering, what is zero for a charged spherical shell?

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What kind of quantity is an Electric potential?

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In the fundamentals of electrical engineering, what do crowded lines of force indicate?

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What is the direction of the electric field at a point?

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What is the magnitude of mutually induced emf, E2 in a transformer?

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Which of these will happen in a transformer when the number of secondary turns is less than the number of primary turns?

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What is the number of primary turns in a 200/1000 V transformer if the emf per turn is 10V?

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What is the equivalent resistance of the primary of a transformer with a voltage transformation ratio of 10 and primary resistance of 0.05Ω when referred to secondary?

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Who defined electric current and devised a method to measure current?

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What is the number of branches in a circuit with three nodes and three loops?

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Who witnessed the effect of magnetism for the first time?

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How many directions can the electric field at a point have?

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The average score is 39%

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Current Electricity Quiz

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Which of the following statement is true both for a series and a parallel D.C. circuit?

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 Insulating materials have the function of

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The hot resistance of the bulb's filament is higher than its cold resistance because the temperature coefficient of the filament is

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Resistance of a material always decreases if

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In the case of direct current

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Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be

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Which of the following statement is correct?

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Which of the following can have negative temperature coefficient?

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An instrument which detects electric current is known as

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Four wires of same material, the same cross-sectional area and the same length when connected in parallel give a resistance of 0.25 Q. If the same four wires are connected is series the effective resistance will be

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Sparking occurs when a load is switched off because the circuit has high

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 International ohm is defined in terms of the resistance of

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An open resistor, when checked with an ohmmeter reads

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 A field of force can exist only between

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High Voltage Engineering Test

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Formative time lag depends on the mechanism of the avalanche growth in gap. The formative time lag is usually

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The statistical time lag depends upon the

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According to the Paschen’s Law, the breakdown voltage of a uniform field gap is

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For the high voltage conductors at high pressures, if the voltage is positive then the corona appears as a

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Field in case of rod gaps and sphere gaps are

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In Breakdown tests, the tests voltages required for these tests are usually of the order of

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The increase in liquid hydrostatic pressure

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 In case of solid particles present in the liquid and in case of presence of only gas bubbles in liquids, the direction of force is towards

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According to the Bubble theory, once a bubble is formed, it will elongate in the direction of electric field under the influence of electrostatic forces. During elongation the volume of bubbles

10 / 19

According to the Stressed Oil Volume theory, the breakdown strength is

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Treeing phenomenon is observed in

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The liquid dielectrics contain voids or cavities within the medium or at the boundaries between the dielectric and the electrodes. The electric field strength in the voids is

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For very small cavities, discharge inception voltage

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Which among the following is not an example of impregnants?

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The example of artificial fibre is

16 / 19

In paper based laminated construction, the typical value of dielectric constant and dielectric loss factor is

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The resin bonded paper bushings are designed to operate at a maximum radial stress of

18 / 19

Resins and varnishes are commonly used in

19 / 19

In a series RLC circuit, the wave front and wave tail times are controlled by changing the value

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Uncategorized

First Quiz

This  quiz is based on Basic knowledge of Electrical Engg.

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1. An instrument which detects electric current is known as

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2. The minimum requirements for causing flow of current are

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3. The flow of current in solids is due to

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4. In gases the flow of current is due to

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5. The resistance of a conductor varies inversely as

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6. The resistance of human body is around

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7. The substance which have a large number of free electrons and offer a resistance are called

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8. Which of the following materials has a negative temperature coefficient of resistance?

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9. The filament of an electric bulb is made of

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10. Which is the best conductor of electricity?

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11. Which of the following does not have negative temperature co-efficient ?

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12. Which of the following method can be used for absolute measurement of resistance?

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13. Which of the following can have negative temperature coefficient ?

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14. Which of the following materials has the least resistivity?

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15. One newton metre is same as

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16. The S.I. unit of power is

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17. The rating of the fuse wire is always expressed in

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18. Which of the following ampere-second could be the unit?

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19. Electric pressure is also called

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20. Which of the following material has nearly zero temperature coefficient of resistance?

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