SSC JE / State Electricity Boards JE Electrical Exams QUIZ-3

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Question 1

A synchronous motor can be used as synchronous condenser when it is

• Aover excited
• Bover loaded
• Cunder excited
• Dunder loaded

Question 2

A d.c. series motor is taking a current of Resistance of armature and resistance of series field What is the back e.m.f.?

• A
• B
• C
• Dnone of the above

Question 3

In a 3-phase, 3-wire system, the conductors are arranged in a horizontal plane such that The conductors are transposed and have a diameter of 2.5 cm. What is the equivalent equilateral spacing?

• A252 cm
• B168 cm
• C324 cm
• D112 cm

Question 4

The following two tariffs are offered:
A- Rs. 100 plus 15 paise per unit
B- A flat rate of 30 paise per unit
At what consumption is first tariff economical?

• Aabove 666.67 units
• Bbelow 350 units
• Cabove 560 units
• Dnone of the above

Question 5

In Fig., the magnitude of the circuit impedance is

• A
• B
• C
• D

Question 6

A 1 – phase energy meter does 10 revolution in 90 seconds. Meter constant for instrument is 1000, then power consumed by load is –

• A4.0 KW
• B
• C
• D

Question 7

Tunnel diode is used in which region

• A1
• B2
• C3
• D4

Question 8

Which of the following capacitors of identical rating will have the smallest dimensions?

• ACeramic capacitor
• BMica capacitor
• CAluminium foil capacitor
• DPaper capacitor

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