SSC JE ELECTRICAL 2019 WITH SOLUTION SET-1 QUIZ

When the supply to the excitation fails, the synchronous generator acts like a/an

Induction generator

Induction motor

Synchronous motor

Synchronous generator

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Split-phase, capacitor, and shaded-pole single-phase motors classified as:

1-phase induction motors

Repulsion motors

A.C. series motors

Un-excited synchronous motors

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The amount of AC content present in the DC output of a rectifier is given by

Ripple factor

Peak factor

Power factor

Form factor

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Which of the following voltage range is used in medium transmission lines?

Less than 20 kV

20 kV to 100 kV

More than 200 kV

50 kV to 200 kV

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Which of the following plants experiences chain reactions?

Thermal power plant

Hydro-electric power plant

Gas power plant

Nuclear power plant

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Hysteresis loss is NOT a function of

Steinmetz co-efficient of material

Frequency

The volume of a material

Ambient temperature

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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 = 60 Hz

P= 12, f = 50 Hz

P = 8, f = 50 Hz

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If the field of the synchronous motor is under excited the power factor will be:

Unity

Zero

Leading

Lagging

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Which motor is referred to as a universal motor?

Series

Synchronous

Single-phase induction

Shunt

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A coil is wound with 50 turns and a current 8A produces a flux of 200μWb. Calculate the inductance of the coil

0.25 mH

1.25 mH

2.5 mH

0.125 mH

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