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Tuesday, 7 August 2012

Electrical quiz

Electrical quiz –

 Part-A
         
1. Full form of CFL –
a) Comprehensive force liquid  b) compact fluorescent lamp  c) compact fire load   d) none
2. full form of MCB
a) Mild Circuit Brain b) Mould core break c) Miniature Circuit breaker d) none
3.  full form of ELCB
a) Earth Leakage Circuit Breaker b) Earth low core break c) Earth Low core breaker d) none
4. Earth Leakage Value for House hold ELCB
a) 30mA             b) 100mA         c) 300mA                   d) none
5. Color of earthing wire
a) Red b) Blue   c) Green    d) none
6. Minimum size of earth for DB  
a) 8 SWG              b) 10 SWG                 c) 12 SWG          d) none
7. Minimum No. of wires for earth power DB  
a) 4 Nos.                   b) 2 Nos.                     c) 1 Nos.                d) none
8. No of wire for Electrical Top to use for Oven/Fridge/Heater  
a) 2 Nos            b) 3 Nos             c) 1 Nos d) none
9. Minimum IR Value for voltage level 500 V   
a) 1 M ohm               b) 100 M ohm              c) 1000 M ohm          d) none
10. Minimum distance around electrical panel
a) 10 M ohm               b) 5 M ohm             c) 1 M ohm            d) none
11. IF fire catches in Electrical DB, what to do
a) Switch off main               b) Use Blanket               c) Put Water       d) None
12. Rating of Power point Switch/socket
a) 15/16A              B) 5/6A               C) 32A               D) None
13. Rating of light point Switch/socket
a) 15/16A              B) 5/6A               C) 32A               D) None
14. color code for 3 phase power
a) R,G,Y  b) R,Y,W  c) R,Y,B               d) None
15. Power frequency in India
a) 60Htz             b) 50Htz          c) 70Htz                d) None


Part-B
1. Feeder pillar is used for power supply
a) Between distribution system to consumer  b) Between distribution system to substation  c) Both  d) None

2. Reliable control supply for electrical panel
a) AC  b) DC  c) NON UPS AC d) None

3. Control supply voltage is chosen
a) Above 440V  b) Below/up to 230V c) Above 11000V  d) None

4. Electrical switch is used in line of 
a) Phase wire  b) Neutral wire  c) Earthing wire d) None

5. Voltage level for domestic use  
a) 230 V AC b) 230V DC c) 440V DC d) None

6. Maximum lighting load on one circuit 
a) 5 KW b) 2 KW c) 1 KW d) None

7. Which is more energy efficient i.e? For Energy saving  
a) Filament lamp b) CFL c) HVSV LAMP d) None

8. Reliable cable laying for colony lighting  
a) Over head cabling b) Underground cabling c) Zigzag cabling  d) None

 9. MCB is used for   
a) Earth fault protection b) Over load protection  c) Differential protection   d) None

10. ELCB is used for   
a) Earth fault protection b) Over load protection  c) Differential protection   d) None

11. One unit is equivalent to     
a) 1000W, 1Hour b) 500w, 2 hour  c) Both    d) None

12. Which is more correct?
a) Electrical connection exists between primary and secondary of transformer
b) No electrical connection exists between primary and secondary of transformer
c) Temporary connection exists between primary and secondary of transformer
d) None

13. Tongue tester is for preferable
a) Current measurement b) Voltage measurement c) Resistance measurement  d) None

14. Multi-meter is used for  
a) Current measurement b) Voltage measurement c) Resistance measurement  d) All

15. Robust and frequently used motor for all purpose   
a) DC Motor b) Synchronous motor  c) Induction motor   d) None

Part-C
16. Motor used for traction in railway   
a) DC series Motor  b) Synchronous motor  c) Induction motor   d) None


17. Motor used in crane     
a) Slip ring motor   b) Synchronous motor  c) Induction motor   d) None

18. Motor used for power factor improvement     
a) Slip ring motor   b) Synchronous motor  c) Induction motor   d) None

19. Low transmission voltage level for domestic distribution       
a) Between 600V to 6600V   b) Below 600V c) Above 6600V   d) None


20. Control relay is used for         
a) Control of power circuit  b) Control of motor circuit  c) automization of power   d) All

21. Discharged rod is used for          
a) To discharged the capacitance voltage   b) To disconnect power connection  
c) To convert power connection     d) None

22. Earth mat in electrical location used for           
a) To connect transformer neutral b) To save working personnel   from sock
c) To provide power in house d) none

23. Electrical permit is required for
a) Excavation job b) Welding job in oily area c) Electrical cabling d) All

24. less than 5KW motor is started
a) Delta connection     b) Star connection  c) Star delta  d) None

25. Bigger than 5KW motor is started
a) Delta connection   b) Star connection  c) Star delta  d) None

 26. Current flow is better in conductor
a) Aluminium       b) Silver  c) Copper  d) Iron

27. Example of electrical conductor
a) Aluminium     b) Silver   c) Copper  d) All

28. Example of electrical insulator
a) PVC    b) Glass c) Porcelain  d) All

29. Which is more suitable to put off electrical fire?  
a) Sand b) Soil c) Water d) None  

30. Megger is frequently used for   
a) Voltage check b) Current check c) Insulation check   d) None

Part-D
31. Fuse gives protection against   
a) short circuit   b) Over load c) Earth fault  d) None

32. Type of voltage to connect transformer     
a) DC  b) AC c) AC &DC  d) None

33. Electric Call bell works on the principle that     
a) Electrical power produces magnetic field b) Magnetic field produces current
c) Both   d) None

34. Suitable for power factor improvement       
a) Conductor  b) Insulator  c) Capacitor d) None

35. Fan speed is slow, cause may be        
a) Regulator defect b) Condenser defect c) Both  d) None

36. Earthing is used for
a) To increase electrical power   b) To protect man and machine
 c) To provide mechanical power d) none

37. Power measurement in DC  
a) W= V X I b) W= V X I Cos¢ c) Both d) None

38. Power measurement in 1-phase, AC  
a) W= V X I b) W= V X I Cos¢ c) Both  d) None

39. Standard size for wiring of lighting point in house  
a) 1.5sqmm b) 2.5sqmm c) 4 sqmm d) None

40. Standard size for wiring of power point in house  
a) 1.5sqmm b) 2.5sqmm c) 2.5sqmm and above  d) None

41. Purpose to use rectifier   
a) To convert AC into DC b) To convert DC into AC  c) Both   d) None

42. Function of resistance in circuit    
a) To increase the flow of current  b) To restricts the flow of current  c) Both   d) None

43. Ohm is the measurement of     
a)  Current   b) Voltage  c) Resistance  d) None

44. A live wire connection may be touched with      
a) Iron hammer   b) Insulated pliers c) Both d) None

part –E

45. Conversion of power from battery       
a) Mechanical to electrical b) Electrical to Mechanical c) Chemical to electrical   d) None

46. Function of Inverter        
a) Converts AC to DC b) Converts DC to AC c) Both    d) None

47. Function of Bus bar box        
a) As junction box for same/different size of cable  b) controls power  c) Indication of power     d) None

48. Function of pole box on street light pole  
a) To switch on street light  b) To switch off street light
c) As junction box for same/different size of cable connection d) May be all

49. Type of connection for domestic use
a) Series connection  b) Parallel connection  c) Loose connection  d) None


50. Economical and good conductor for power distribution  
a) Silver   b) Copper   c) Iron   d) Aluminium  

51. Suitable rating for 1000W Iron   
a) 6/10A b) 16A  c) 32A d) 63A

52. More preferable electrical appliance    
a) With ISI Mark  b) Without ISI Mark c) Any d) None

53. More energy efficient electrical appliance    
a) Without star rating   b) With star rating   c) Any  d) None

54. Standard height of electrical DB in house    
a) 2-3 feet    b) 3-4 feet   c) 4-5 feet  d) all

55. Frequently used motor for home appliance      
a) 1-phase AC motor     b) 2-phase AC motor    c) 3-phase AC motor     d) All

56. If you see a spark in cable, what will you do?
a) Cut the power cable     b) Pour water     c) Contact emergency phone call d) Run away





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