Todays KPSC Electrician Answer key

1.Which method can be used for measuring low and medium value of resistance?

Voltmeter and Ammeter method

2.The SI unit of specific resistance is….?

Ohm – meter

3. According to kirchhoff’s law algebraic sign of an IR drop is primarily dependent upon the….?

Direction of current flow

4. What is the value of resistance in an open circuit?

Infinity

5. What is the unit of Reluctance?

Ampere turns / weber

6. Which is the cause for changing the permeability?

Flux density

7. A substance that has a high retentiveness can be used for the manufacture of….?

Permanent magnet

8. Which is the Diamagnetic substance…?

Water

9. The direction of induced emf can be found with the help of…?

Lenz’s law

10 The magnetizing force required to wipe off residual magnetism is known as…?

Coercive force

11. The example of natural magnet is …?

Lode stone

12. Which electrical quantity is directly proportional to the eddy current?

Frequency

13. How the value of capacitance can be decreased?

Increasing the distance  between the plates

14. Which of the following quantity maintain the same polarity during charging and discharging of a capacitor?

Capacitor voltage

15. What is the SI unit of Susceptance?

Mho

16. What is the formula to find 3 phase reactive power if the line voltage is V and line current is I_L? √3V_LI_LSINφ

17. What is the main cause foe below 0.5 lagging power factor in 3 phase system?

Reactive power due to more inductive load

18. A 3 phase, 4 wire 230V/415V system is supplying lamp load at 230 volt. If a 3 phase motor is now switched ON across the supply, then…?

Neutral current remains unchanged

19. For plate earthing,  plate  electrodes thickness when made of GI or steel should not be less than…?

6.3 mm

20. According to IE Rule the leakage current in an installation should not exceed one ….th part of the maximum current supplied to the installation?

5000

21. The size of earth continuity conductor in a circuit should be based upon the…?

Size of the largest service conductor

22. In surface conduit wiring, saddles should be fitted at the intervals of not more than….meter?

One

23. In batten wiring, link clips will have two holes for…?

50mm

24. According to IE rules, the measured insulation resistance should not be less than….? 

1mega ohm

25. Eight carbon zinc cell in series have an output of….volt?

12