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1412015 Related Question Answers
51. The correct sequence of the conducting materialon the basis of conducting is :
Silver, copper, gold, aluminum Silver, gold, copper, aluminum Silver, copper, aluminum, gold Silver, aluminum, copper, gold
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52. Among them which material having highest die electric strength :
Porcelain Mica Ebonite Rubber
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53. For a human body the ear to ear resistance is about —ohm.
100 ohm 500 ohm 1000 ohm 800 ohms
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55. Constantum is the alloy contain :
60% copper & 40% tin 40% nickel & 60% zinc 40% copper & 60% Zinc 60% copper & 40% nickel
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56. The insulating material used for the preparationof cable joint is :
Coal tar compound Rubber compound PVC compound Bitumenes compound
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57. The ratio of mmf to reluctance is called :
Flux density Permeability Flux Magnetic leakage
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58. The tumbrule of measurement of insulation resistance of an installation should be ]less than :
500 kilo ohm 2 mega ohm 1 mega ohm 50/no of outlets
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59. The average voltage drop of a soft graphate brush in a DC generator is :
2 volt 1.6 volt 1.1 volt 2.2 volt
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60. A magnetic material having large area of hysterisis loop, the material having :
Low permeability high retentivity High permeability low retentivity Low permeability low retentivity High permeability high retentivity
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61. Flashing means :
Create residual magnetism in a dc generator Making permanent magnet Initial charging method of lead acid battery Failure of insulator in transmission line
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62. The equation for back emf in a DC generator Eb = :
φZN/ 600 P*A V + IaRa φZN/60 P/A IARa-V
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63. In the case of extra high voltage how much voltage can be permissible in the case of higher voltage regulation :
0.12 0.125 10% 0.06
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64. Smoothening is the fire exchanging process by which :
Use water for fire extinguishing Cooling the fire using fire extinguishers Prevent the supply of fuel to the fire Isolate the fire from the supply of oxygen
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65. The current through the holding coil of a 4 point starter is limited by :
Field coil Resistance Starting resistance Holding coil only
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66. The class of measuring instrument that used for industrial and panel board application is :
Class 0.1 Class 1 Class 0.5 Classes -2
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67. Among them which method of measurement is not used for low resistance measurement:
Kelvins bridge Pottentiometer method Wheat stone bridge Ammeter volt meter method
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68. The effective value of alternating current is :
0.707 I max 0.606 I max 1.1 I max 1.414 I max
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71. When four no of 2v, 4 Ah cells are connected in parallel, what will be it's Ah capacity :
4 Ah 8 Ah 2 Ah 16 Ah
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72. Boost charging method of battery is used to the battery for charging :
Over discharge battery Initial charging of battery For charging a dead cell For normal charging of a battery
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74. Mica capacitors are best suited for :
Low frequency application Low captors value required application As a low pass filter High frequency application
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