SSC JE ELECTRICAL 2019 WITH SOLUTION SET-1 QUIZ

In the circuit shown, find the equivalent resistance between A and B.<br/>

75 ohm

150 ohm

100 ohm

50 ohm

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

Rotor-resistance

Star-delta

Direct-on-line

Auto-transformer

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Which of the following losses is together called iron losses?

Eddy current loss and frictional loss

Hysteresis loss and frictional loss

Hysteresis loss and copper loss

Eddy current loss and hysteresis loss

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H = ____is the expression for the magnetic field due to an infinite linear current-carrying conductor

(I ⁄ 2Πr) A/m

(I ⁄ 2r) A/m

(μI ⁄ 2r) A/m

(μI ⁄ 2Πr) A/m

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The ratio of average energy demand to maximum demand during a specific period in

Load factor

Form factor

Utilization factor

Power factor

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P = ρQHg is the water power equation. Head ‘H’ is measured in meter ‘g’ gravity constant is measured in meter/second square, then the measuring unit of ‘Q’, the flow rate of water is:

Meter per hour

Meter per second

Cubic meter per second

Square meter per second

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Three lamps are connected in series across a 120V supply and take a current of 1.5A. If the resistance of two of the lamps is 30Ω, what is the resistance of the third lamp?

30Ω

20Ω

10Ω

40Ω

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Two coupled coils with L1 = L2 = 0.5H have a coupling coefficient of K = 0.75. The turn ratio N1 ⁄ N2 = ?

1

2

0.5

4

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The power factor of an A.C. circuit is equal to

R/XL

R/XC

Z/R

R/Z

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If the copper loss of a transformer at half full load is 400 W, then the copper loss corresponding to full load is

400 W

1200 W

800 W

1600 W

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