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Electrical Engineering Interview Questions

What is the difference between hot and cold loop testing?

149

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.

143

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

184

how the aircraft outer body and inner body is separated ?

120

how the inner and outer body is separated in aircrafts?

131

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

1474

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

131

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?

2752

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

143

What is the difference between DOL starter and star delta starter

123

electrical knowelge

129

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

129

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

225

What is various types of electrical formula?

194

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

230

Un-Answered Questions { Electrical Engineering }

What is a feedback in control system?

165

Explain Continuous and Discrete signals?

785

In our plant we have installed new MCC with ELR and CBCT which is detecting some leakage current in the system but it leading to some confusion when to check that in which feeder which is drawing current we put off the whole panel itself but still CBCT detecting some leakage current so can anybody ans me , where i am going wrong or how to detect whether its actual leakage or CBCT malfunctioning.

1075

WHAT IS SUBSTATION & ACCORDING TO VOLTAGE HT,EHT SUBSTATION EXPLAIN IT

2131

what is the necessary of using inductance property in transmission lines even through resistance is used to opposes the high current flows in that?????

939

In dc ckt. 24v or 110v, which one is more efficient and why?

1176

why we setting 95 deg and 105 deg in wti and oti of distibution transformer ? give the reson for that ?

1943

Motor,transformers,capacitor tubelight etc....

696

what are the possible reaons & remedies if resistance of NGR getting heat up

929

CAN ANYBODY PLEASE TELL ME HOW TO DESIGN A SERIES REACTOR FOR LIMITING SHORT CIRCUIT FAULT CURRENT??

1002

why cable i burning without tripping. how can protect led street lights

604

sir, 3phase induction motor takes different pf and different KW in three phase while running,explain reason

540

Transmission through a short line depends on

1185

Post possible questions for Power Factor Panel FAT / SAT

534

what is the working process of over & under voltage relay.

1088