Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Can Induction motor run at over rated speed? ( 15oo rpm is rated speed for 50HZ. is it possible to ride 3000 RPM with same motor with the help of VVVFD for continues ride of 100HZ)

Equate,

3 8462

HT motors are generally connected in star, what will be the effect if we connect HT motor in Delta?

Equate, Ion Exchange,

6 15533

What is the magnetic field (coil DC ) of Turbo Expander?

TATA,

1592

What will happened if the neutral of the (star connected secondry) Xformer disconnected? (if its Above KVA rated one)

Equate,

1717

What the main causes of transient interruptions on Over-Head Distribution Lines?

Orion Laboratories,

1595

how we can select a transformer based on a particular load. suppose we have 4 motors of rating 40 h.p , 50 h.p, 80 h.p & 100 h.p. then what rating of transformer we can select. urgent. pls reply

6 18439

pls give proper discription of selection of transformer based on particular load.

1 2986

what is a reactive power? what is the relation with power factor?

1645

How can we calculate the motor frame sizes?

Essar,

2920

when we are going to higher voltage level in substations why we are using Sf6 circuit breakers instead of Vacuum circuit breakers.

3 4744

what is the formula to calculate the fuel consumption of a diesel generator at different diferent load.

Aegis, Network Clothing Company,

4 23343

what is a difference b/w earthing & neutral?

ABB, KEC, Sterlite,

5 9884

why we used star delta starter for above 5hp motors

2 6640

Hi Recently I got one formula that is Impedence of Xformer = Rated KVA/Root 3 * secondry voltage OF Xformer. Is it Right??????

2 3755

Why Powers are named in MW?

1 3773


Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

Explain thin film resistors and wire-wound resistors

643


hi can any body send me syllabus of rrb electrical section engg... and past pepar also of any board...

2138


How many devices can be connected in one zone of FACP

1802


How can we measure earthing resistance test (Earth meggar) of Transformer neutral pit while in live condition?.

1643


Why HT 11 KV Slipring Motors are connected in star ?

1775






Draw the vector diagram and condition for the following: 1) Dyn1 2) Ynd0 3) YnYn0

3169


Differentiate between induced emf and self inductance?

610


What is the type of earth fault protection used in battery? explain.

1870


A system absorbs 100 k J of heat and the increase in its internal energy is 100 kJ; the work done is

776


how to calculate percentage impedence at 75 deg C at normal tap

1808


What kinds of decision are made about CT from it's Knee point(voltage & current)?

3820


aternator every parts and its working

1188


Why is back emf used for a DC motor? Highlight its significance.

708


what is rocking arrangement in arc heating

1689


How to calculate Voltage regulation of 22 KV Over head Line.

1200