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1522016 Related Question Answers
51. The back emf set up in the stator of a synchronous motor will depend on :
rotor speed only stator speed only rotor emf rotor excitation
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52. The armature Wdg of repulsion motor is excited :
resistivelv inductively conductively capacitively
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53. The mam disadvantage of shaded pole motor :
low-starting torque little over load capacity low efficiency all the above
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54. The armature flux opposes the main flux is in synchronous machine when the PF is :
unit’ zero lagging zero leading 0.8 lagging
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57. Potential inside the hollow charged sphere :
less than itssurface greater than onits surface same as on its surface zero
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58. Capacitance in any circuit is opposition to :
voltage current flow any changein current any change inpower
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59. The simple measuring instrument used to transfer measurement from the steel rule to object :
try-square calliper scriber punch
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61. If the diameter of a wire is doubled keeping the length constant the resistance :
becomes one fourth become twice remains same becomes 4 times
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62. Which of the following is linear and bilateral element ?
Semiconductor resistor electron tube transistor
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63. Sedimentation occurs in lead acid cell
over charging at high rate over charging at slow rating no use for longer period slow charged rate
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64. Kirchhoff's law are valid for :
linear circuit non-linear circuit both linear and non-linear circuit passive circuit
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65. The algebraic sum of all IR drops and emf in any closed loop of a network as per KVL is :
#NAME? zero #NAME? #NAME?
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66. Form factor is the ratio of :
average value/rms value average value x rms value instantaneous value/rms value rms value/average value
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68. A choke coil has :
high inductive, high resistance low inductive, low resistance low inductive, high resistance high inductive, low resistance
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69. A choke is used for limiting current in :
AC ckt only DC ckt only both AC and DC either AC or DC
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71. 2 Wattmeter method measuring power, 2 meters read equal and opposite reading the load power factor :
zero 0.5 unity above0.5
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72. The secondary current of 400 kVA, 11kV/433V, 3 phase transformer is about :
420 A 533A 666.5A 840 A
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74. The maximum efficiency of distribution transformer is :
I/4th load full load 3/4th load half load
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