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 8335

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 5744

Why we use negetive (-)voltage in vibration system

4 12289

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

1 6885

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

2259

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

5 16049

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 8019

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

7 9307

is high voltage or high current is danger

L&T,

16 23739

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

3 5221

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 3938

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

Suzlon, TCS,

6 14003

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

1 5820

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

1 3903

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

ASD Lab,

1 3730

Related Topics

Voltage

Un-Answered Questions { Voltage }

How does a Bandgap Voltage reference work?

3978

How about voltage source?

2330

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

3093

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

1847

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

2496

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.

2259

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.

2317

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

2290

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

2882

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?

2352

Formulae for calculating the transmission line losses for different voltage levels

2248

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?

2378

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

6236

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

2237

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

1892