Category: Electrical Engineering

The Laser Beam Machining process can be carried out, when the media for energy transfer between tool and workpiece is?

A. Air B. Liquid C. Vacuum D. Any of the above medium Right Answer: D. Any of the above medium

According to the Paschen’s Law, the breakdown voltage of a uniform field gap is?

A. Directly proportional to the gas pressure and inversely proportional to the electrode gap B. Inversely proportional to the gas pressure and directly proportional to the electrode gap C. Directly proportional to …

Treeing phenomenon is observed in?

A. Capacitors B. Cables C. Insulators D. Only a and b Right Answer: D. Only a and b

For very small cavities, discharge inception voltage?

A. Decreases as the cavity depth increases B. Increases as the cavity depth increases C. Remains unaffected as the cavity depth increases D. None of these Right Answer: A. Decreases as the cavity …

The resin bonded paper bushings are designed to operate at a maximum radial stress of?

A. 5 kV/cm B. 10 kV/cm C. 15 kV/cm D. 20 kV/cm Right Answer: D. 20 kV/cm

Resins and varnishes are commonly used in?

A. Generators and motors B. Cables C. Transformers D. Circuit breakers Right Answer: A. Generators and motors

The disadvantages of resonant transformers is?

A. Pure sine wave output B. No high power arcing C. No repeated flashovers D. Additional variable chokes Right Answer: D. Additional variable chokes

In a series RLC circuit, the wave front and wave tail times are controlled by changing the value?

A. R only B. R and L simultaneously C. R and C simultaneously D. L and C simultaneously Right Answer: B. R and L simultaneously

A Capacitance Voltage Transformer can be connected to a?

A. High impedance device B. Low impedance device C. Relay coil D. Only b and c Right Answer: D. Only b and c

The series capacitor peak voltmeter is suitable for?

A. Positive half cycle B. Negative half cycle C. Sinusoidal waveform D. All of these Right Answer: D. All of these