Voltage Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Topic :: Voltage

Voltage Interview Questions

Questions Answers Views Company eMail

In separator VFD frequently trip with OVER VOLTAGE Fault What is the reason?

4 7998

I have 30KW Motor Starter Panel, System voltage is 480V, So i have to convert voltage 480 to 220V to give the contactor coil. How i can select control transformer, Which rating transformer i can use this panel, what is the procedure, please tell me.

2 5496

Why we use negetive (-)voltage in vibration system

4 11885

why phase to phase voltage is 400v while phase to neutral is 220v?

1 6654

why we use sinosidal voltage / current instead of others in system?

2149

why we use CVT (capacitive voltage transformer)in switch yard?

5 15540

Why we transmit the power at the voltage in the multiple of 11 or 1.1 like 11kv, 22kv, 66kv, 132kv...... some one told me that it is due to fomr factor 1.1 of sine wave. its fine but while transforming we can choose any voltage, so why only multiple of 1.1 there also.......? plz tell me.

7 7457

avr is an automayic voltage regulator ... it regulates voltage before it synchronise with grid after synchronisation it regulates power factor why....

7 8819

is high voltage or high current is danger

L&T,

16 22618

What is neutral earth voltage of transformer and what should be the value

3 4979

What are the reason of unbalanced secondary voltage of HT transformer 33kv/6.6kv ? Incomming voltage is balanced.33kv each secondary voltage 6.6 kv 6.4 kv 6.4 kv At no load conditions.

1 3772

why all selected supply voltages are multiple of 11.i.e440,11 kv,33 kv,66 kv,110 kv etc

Suzlon, TCS,

6 13539

what difference beetwin phase voltage & line voltage and phase current& line current ?

1 5622

What happens when ac supply is given as excitation voltage instead of dc supply

1 3696

what is the min and max dc voltage for a dc system (110vdc)

ASD Lab,

1 3536

Related Topics

Voltage

Un-Answered Questions { Voltage }

How does a Bandgap Voltage reference work?

3847

How about voltage source?

2212

How do you size NMOS and PMOS transistors to increase the threshold voltage?

2968

Explain the basic circuits for a current- and voltage- clamp set-up.

1740

What types of I/O have you designed? What were their size? Speed? Configuration? Voltage requirements?

2391

I just want to convert the voltage into current i.e. suppose I have 750V & 1A AC power then I want to convert it into 12V & 62A DC power only difficulty is that I don't want to use the tranceformer. Simply to say, I want to make the step-down without using tranceformer. Please, give me some ideas. And also I want the relation between Magnetic Induction & Weight of the body can be levitated. Or I can say, how much of magnetic induction requires to lift 500gms weight? I am heartily thankful to you.

2167

iam using DM 3251 voltmeter(1 percent accuracy)for 11KV system PT ratio is 11KV/110V.can anybody explain what is the max and min voltage deviation.

2206

how define the torque in ac drive. from electrical side in the drive friquency ,voltage and current three factor is there.

2179

can we calculate the voltage level for microwave energy which is using for our mobile communication?

2754

Is it possible to calculate a voltage for microwave energy generating in oven? Is there any formula relating frequency and voltage and it should be independent of speed?

2254

Formulae for calculating the transmission line losses for different voltage levels

2113

Why the dc voltage drop during starting of emergency lube oil pump? The Voltage drop from 135kv to 125 kv for one min. before re-establish to 135kv?

2255

What si the d/f b/w KVA & KWH, kvarh & kvar, kwh & kvar phase voltage & line voltage

6083

What is the difference between Static and servo controlled voltage stablizer?

2128

What is the rating factor for copper cable ( Specific value according to the type of laying ) & the voltage drop?

1811