SSC JE ELECTRICAL 2018 WITH SOLUTION SET-1 QUIZ

Determine the phase angle (in degrees) of a balanced 3-phase star connected system, if the first and the second wattmeter show reading of 200 W and 1200 W respectively

65

84

78

51

TRUE ANSWER : ?
YOUR ANSWER : ?

In a synchronous motor running with the fixed excitation, when the load is increased two times, its torque angle becomes approximately

Half

No Change

Twice

Four Times

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For a dc machine shunt resistance and armature resistance values are

High and Low

Low and Low

Low and High

High and High

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Determine the value of produced mmf (in Amp-turns) in a coil if the coil has a 120 turns carrying a current of 0.1 A

18

12

14

16

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A DC generator used for ARC welding should Have

None of these

Dropping Characteristics

Rising characteristics

Straight characteristics

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If the centrifugal switch does not open at 70 to 80 percent of a synchronous speed of the motor, it would result in

Damage to the centrifugal switch

None of these

Overloading of running winding

Damage to the starting winding

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Determine the value of current (in A) through both the resistors of the given circuit.<br/>

2, 1.5

−2, 1.5

−2, −1.5

2, −1.5

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Cutting pliers use for electrical work must have

Insulation

Non corrode

Sharp

High strength

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In a Hysteresis Motor, the rotor must have

Retentivity

None of these

Susceptibility

Resistivity

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Direct resistance Heating is used in

Resistance Welding

All of these

Salt-Bath furnace

Electrode Boiler

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