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HAL Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Is it possible to measure correct value of earth resistance & cable insulation ristance with out disconncting earth lead & both sides of cable ends? If not, any other method to measure ER & CIR with out disconneting from the system.


Is it possible to use AC supply insted of DC supply in trip coil operation? if not, why?

5 5053

How to do cable earhing? whether by grounding Armour to ground or by running extra G.I wire along with cable? which one is preferred mostly amoung them? If the second one is more preferable how many GI wires to be run along with cable (1 or 2)?


Why the generating station rating is in KW though the rating of generators in KVA?

8 9084

What are the solutions for avioding sulfide formation at bimetalic (Copper &Aluminium)overhead joints?

2 3331

How to calculate no of Lighning arrestors are required for protecting 50mX 50m*20m cubical building and locations of LA?


What is the min.& max distance between two earth spikes is required for measuring earth resistance of an earth pit? Is the manufacturer of Earth tester decides this? Pls explain.

3 7273

what is the difference between UPS & Inverter

7 10767

What is the reasonable voltage between Neutral & Earth of an electrical system for good earthing?

6 8591

What is the general power consumption rating of CPU CRT type and Flat type, Monitor,Printer, projector, Scanner?


What is the current carrying capacity of 0SWG,3SWG,10 & 12 SWG solid bare overhead copper conductors?


Is it reuired to use house service barcket for 31/2 core 300 cable,if the distance between pole & shop is around 2 mtrs only or can I hang the cable with GI support in air? upto what size of cable GI serrvice btacket is necessary?

1 2305

Can I do body earthing of machine by using Cable armour or I have to run another GI wire for body earthing and how many wires I need to run. Is there any rule for this. eartnig

3 3946

An ELHNC 80amp 240v 30mA RCD is tripping periodically, every 30 - 180 seconds is it safe to disconnect the protection circuit?


Please tell me what is the difference between online UPS & OFF line UPS?

2 4348

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Un-Answered Questions

What is Monad in Scala?


Can you tell me more about pu systems (per unit systems )calculation in large power systems? how to get the base for voltage and power in generator, transformator and transmission lines?


How to get the position of the character in a string in php?


What is ctrl n in word?


What is parallel foreach in c#?


What is the important to identify special offers like free shipping before building an adwords campaign?


Your project has recently experienced change. Some of the agreed-upon WBS elements have been changed as a result. What kind of change has occurred? A. Schedule change B. Risk response change C. Quality change D. Scope change


When will a port of ooRexx to "XYZ" be available?


Why is it not necessary to configure standard jsp tags in web.xml?


Can constructor be used instead of init(), to initialize servlet?


What is the toughest decision you've had to take in your life


What is an identity mapper and identity reducer?


Which is the best language for machine learning?


Where is eyedropper tool in powerpoint?


What is Text Analytics API in Azure Machine?