SSC JE ELECTRICAL 2019 WITH SOLUTION SET-1 QUIZ

The meter constant of an energy meter will be given in:

Revolutions/kWh

kWh/Revolutions

Revolutions/kW

kW/Revolutions

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The below symbol which is used in single line diagrams represents<br/>

Circuit breaker

Potential transformer

Power transformer

Current transformer

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The direction of the arrow represents the direction of when the diode is forward biased

P-type material

N-type material

Conventional current flow

P-N Junction

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The Norton’s current in the circuit shown below is<br/>

4A

120A

2A

12A

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A single-phase circuit’s power factor can be measured with a/an

Wattmeter alone

Energy meter alone

Combination of a voltmeter, ammeter, and wattmeter

Combination of a voltmeter and ammeter

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A synchronous motor runs at 600rpm, which of the following case is true?

P = 10, f = 60 Hz

P= 12, f = 50 Hz

P = 12, f = 60 Hz

P = 8, f = 50 Hz

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Is it possible to have current in a transmission line, under no-load conditions?

Yes, because of skin effect

Yes, because of the corona effect

No, because of the proximity effect

Yes, because of the capacitance effect

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______starting method CANNOT be used for starting a 3-phase squirrel cage induction motor

Direct-on-line

Star-delta

Auto-transformer

Rotor-resistance

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The resistive component of the rotor with resistance R2 offered to the backward rotating flux wave in a single-phase motor runs with slip s is given as

R2 ⁄ (1 − S)

R2 ⁄ (2 − S)

R2 ⁄ (1 + S)

R2 ⁄ S

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In a capacitor start single phase induction motor the current in the:

Starting winding leads the voltage

Supply lines lead the voltage

Starting winding lags the voltage

The main winding leads the voltage

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