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Question
why double earthing is required for welding machine & 
electrical tools.
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
to give low resistance and if one earth is out of
order,second will do the required work of earthing the equipment
 
Is This Answer Correct ?    39 Yes 2 No
Divyesh
 
Answer
# 2
for safty purpose only. if one is failure another in line 
Is This Answer Correct ?    17 Yes 3 No
Dinakaran
 
 
 
Answer
# 3
Double earthing is
used to give
minimum
resistance to the
flow of whole
current of the
apparatus in case
of short circuit or
leakage or any
such other fault.
 
Is This Answer Correct ?    15 Yes 1 No
Bilal Mir
 
Answer
# 4
1.For safety of personnel & equipment
2.Reduces voltage fluctuation in case of excess current flow.
3.In case non use of tripping devices it reduces the risk of electrocution.
 
Is This Answer Correct ?    9 Yes 5 No
Pravin
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
what is PI value and its significance for insulation testing?   2
What is the difference between Neutral And Earth ? Ambuja 2
what is the principal of transformer?   2
What will the effect on a motor designed at 60 HZ, and operated on 50 HZ ??   8
what are cable earthing and bus earthing trucks?when and where they are used?   1
Can we connect more than one NGR at a time of different rating of generators. what is advantage or disadvantage.   2
Define working of prim mover governer in alternator?   1
1.Can anybody explain Why starters are not used for motor starting in industries? 2.   7
why most of the induction motors are delta connected?   6
why it is in star to delta form of Synchrounus generator and delta to star form of Generator Transformer (or step up transformer)   1
How would we calculate the no of earthing pits required for motor /panel National-Engineering-Industries 5
how to identified power tranfer line is how much KV???? Essar 5
 
For more Electrical Engineering Interview Questions Click Here 
 
 
 
 
 


   
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