One Liner about Basic Electrical for RRB JE

In this article We will provide one liner questions and answers for electrical students who want to appear in RRB JE, GDCE JE, Electricity Board exam and SSC JE etc. 

1. Full form of RDSO is Research Design and Standard Organisation. 

2. Full form of RDX is Research Department Explosive/ Royal Demolition Explosive.

3. Full form of RMS is Railway Mail Service.

4. Full form of CRS is  Commissioner Of Railway Safety.

5. Full form of RITES is  Rail India Technical and Echonomic Services Ltd.

6. Full form of IREEN is Indian Railway Institute of Electrical Engineer.

7. DC to DC converter is called Chopper.

8. DC to AC converter is called Inverter.

9. AC to AC converter is called Cyclo Converter.

10. AC to DC converter is called Rectifier.

11. Resistance, Voltage or EMF and Current in electric circuit will be analogous to Reluctance, MMF and flux in magnetic circuit.

12.  Ampere circuit law tells about relationship between current and magnetic field produced by current.

13. For electricity installation at home IE rule 1956 is followed.

14. According to IE Rule 1956 frequency variation permissible for supply is +- 3 %.( IE RULE 55)

15. Voltage variation permissible for low to medium voltage upto 33 KV is +- 6 %.

16. Earth resistance must be less than 1 ohm, insulation resistance must be more than 1 M ohm and leakage current must be less than 1/5000 or 0.02 % of full load current. (IE RULE No. 48)

17. Hight of meter Board must be at least 1.5 meter and light bracket hight must be between 2 to 2.5 meter.

18. Maximum number of points in 5 Ampere circuit must be 10 and  maximum load in sub circuit must be less than 800 watt.

19. Minimum clearance of low to medium voltage over head lines must be 5.8 meter.( IE RULE 77)

20. Ceiling fan minimum hight must be 2.5 meter.

21. Maximum transmission voltage in INDIA is 765 KV at Raichur to Solapur transmission line. 

22. Human body current limit is 30 mili ampere per second.

23. Danger notice come under IE RULE 35.

24. Earth terminal is compulsory suitable for license come under IE RULE 33.

25. In modern houses conduit conceal wiring is used and in older times conduit surface wiring were used.

26. In wiring copper or aluminium materials wire are mainly used.

27. Motor used in ceiling fan is capacitor start capacitor run type induction motor.

28. Colour rendering index of incandescent lamps are maximum because of which they are mostly used in study lamps.

29. Fuse used in houses are Kitkat type rewirable fuse.

30. Fuse used in electric and electronic appliances are HRC type single use fuse.

31. Wire used in Incandescent Lamp is made of tungsten.

32. Wire used in heater is made of  Nichrome.

33. Solder Wire is an alloy of lead and tin.

34. Nichrorme wire is an alloy of Nickel and Chromium.

35. Material used for OHE wires is ACSR ( Aluminium core steel reinforced ).

36. Over head wires are made with stranded wires to reduce skin effect.

37. Brass is an alloy of copper and zinc.

38. Bronze is an alloy of copper and tin.

39. Permanent magnet is an alloy of cobalt and steel. (35 % : 65 %)

40. Light weight Permanent magnets are made of hard ferrite.

41. Magnetic material used for high frequency communication system is Nickel and ferrite alloy. (80 % : 20 %)

42. Constantan/ Eureka is an alloy of copper and nickel. (55 % : 45 %)

43. For HV cable insulation impregnated paper is used.

44. For EHV cable insulation poly propylene laminated paper is used.

45. For high value of current density metal graphite brushes are used in motors/generators.

46. For OHE insuoators used are made by porcelain material.

47. Porcelain is an alloy of silicon, felspar and clay. ( 20 % : 30 % : 50 %)

48. Steel is an alloy of iron and carbon. 

49. Gun metal is an alloy of copper,  tin and zinc.

50. Thermit is an alloy of Aluminium powder and Iron oxide. ( 25 % : 75 % )

Author:- Amarjeet Singh Jamwal authored articles on Basic Electronics Engineering, Electric Traction, and Electronics Practical for INFO4EEE Website