Electrical Engineering Interview Questions
Questions Answers Views Company eMail

What is the difference between hot and cold loop testing?

639

L.A. (Lightening Arrester) is located at a place from where transmission line enters the transmitting substation. So L.A. (Lightening Arrester) is the first equipments which has to encounter with lightening, high voltage surges and switching surges. It has to absorb energy of lightening, high voltage surges, and switching surges. L.A. (Lightening Arrester) is made up of layers of semiconductors. If these layers can not tolerate energy released by lightening, high voltage surges, and switching surges the L.A. (Lightening Arrester) blasts.

636

What is the effect of electric motor stuck in star configuration,

660

how the aircraft outer body and inner body is separated ?

593

how the inner and outer body is separated in aircrafts?

570

Why we use d.c. meger in a.c. induction motor?

1 9269

What happens to a motor if it is connected in Delta connection

541

75 kw motor take 45 amp in no load delta in star 10 amp but in load it will take 160 amp but IR velue of winding above 500 at 1kw ph to earth and ph to ph. what problem it should be?

3239

what is the range of maximum DOL and SDS can be use for pump and fan application

598

What is the difference between DOL starter and star delta starter

551

electrical knowelge

698

What is resistance reading of earth copper rod with grid and without grid?

617

A 230 v dc series motor is connected to 230 V ac supply, then

1 1091

What is various types of electrical formula?

1 989

How many gap between finger contact in a.c.b. and v.cb.?

715


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Un-Answered Questions { Electrical Engineering }

Hi all I had applied for the RRB test in the ELECRICAL category. I would be pleased if any of you can sent me previous year question papers. Please forward the question papers to varshashahi@yahoo.com Thanks and regards Varsha

1682


How to decide no. of Step and Kvar for APFC Panel 40 kvar MD: 33.12 KVA Avg pf : 0.8540

641


what is the IPC ? & what the uses ?

975


what is meant by neutral compensation factor and where it is used

1425


what is mean by descripiency relay? & wht is its ansi code?

2587






Is it required to lay 2 runs of GI wires along with armoured cables from one power DB to another Power DB?

1450


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

674


Draw a circuit diagram in which if button is open we can use socket and bulb as a series test circit and if button is close than simple we can use socket as any load purpose.

1405


why core is useful for a transformer ?and also in its operation ?

1558


what is the purpose of high speed earth switch in gas insulated substat

2512


What is the diffrence (Technical & Construction ) between CBCT & Normal CT?

1520


difference between power surge and switching transient

1502


how can i get the formula to find out the cable size if i know the load of main fuse protection.

1403


is it possible for different brand of H.V transformers to run or operate in parallel to each other? if so how much disturbance can this affact the H.V bus bar?

1611


what is the maximum temperature rating of a thhn insulated conductor?

1326