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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 4624

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 8397

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

2 3049

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 6945

what is the difference between UPS & Inverter

7 10181

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

6 8044

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 2123

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 3646

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 4081

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Un-Answered Questions

Why the config file might not be writable


Define factory method in angularjs.


Why swift is faster than objective c?


normally database take to refresh time 2 hours. but client asked iwant to refresh with in 5 min that same database. do you have any option in BO and Oracle? explain me briefly...kavi


Do you know how to send email from database?


sanity testing is done during regression it true.if it is true plz explain?


Define what types of carriers are present in space charge region?


What is htmlinputelement?


What are the basic elements used for modeling mechanical rotational system?


what is capacitor voltage transformer?? how it is different from potential transformer?


1).HI SAP GURUS CAN ANY BODY PROVIDE ME LSMW STEP IN SAP, HOW TO UPLOAD & ITS PROCESS? 2.A client having one (I) group company(phoenix group) (1)phoenix steels (2)phoenix mils,( 3) phoenix steels & he is having business branches in hyd & bangalore.How to configure company,company code level & chart of A/c Level? 3). A client having 3 bank a/c's 1 is sbi 2 is hdfc 3 is icici how to configure? pls it is an urgent. 4)we are doing configuration for client whether the data will save client server or local server?


what is a .xap file?


What is mq?


What are the different components of ansible? Explain ansible architecture.


Why should I care about search engine marketing?