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Question
why double earthing is required for welding machine & 
electrical tools.
 Question Submitted By :: Yog_1983472rediffmail.com
I also faced this Question!!     Rank Answer Posted By  
 
  Re: why double earthing is required for welding machine & electrical tools.
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 ?    37 Yes 1 No
Divyesh
 
  Re: why double earthing is required for welding machine & electrical tools.
Answer
# 2
for safty purpose only. if one is failure another in line 
Is This Answer Correct ?    15 Yes 3 No
Dinakaran
 
 
 
  Re: why double earthing is required for welding machine & electrical tools.
Answer
# 3
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 4 No
Pravin
 
  Re: why double earthing is required for welding machine & electrical tools.
Answer
# 4
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 ?    14 Yes 1 No
Bilal Mir
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
Give the two basic speed control of DC shunt motor.   4
Why the power factor of the alternator in power plant is kept .8 lagging. Can't we maintain it at 1.   2
DG lube oil and waste oil how to dispose outside and there is any authorised vendors will be there for this.   2
what type of protection used below 132KV feeders APTransco 10
what is the purpose of vector group in a transformer ? if 2 tranaformers r connected in parallel the vector group is same or not? for parallel operation 2 transformers of different manufacturers maintain same vector group or not? Orchid 3
what is differential relay in power transformer??   8
we all know that in capacitor there will be no ay physical connection between the two electrodes of the capacitor ,and the charge is stored between these electrodes during charging , so with out any physical connection how these charge is transferred from one plate to the another plate during the discharge?????   1
what will be the motor terminal box connection arrangement (star or delta). on what basis it decided?   2
What is Transformer? HSL 23
what is unit of inductance Bhel 11
why does not tester light up when it is touched to neutral of 3 pin socket.   4
what is the diffrent between ups and inverter Abb 2
 
For more Electrical Engineering Interview Questions Click Here 
 
 
 
 
 


   
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