Generally earthing is provided for :

for the safety of the equipment

for the safety of the operating personnel

for the safety of the equipment and for the safety of the operating personnel

none of the above

grounding resistance should be as low as possible

grounding resistance should be as high as possible

grounding resistance should be always zero

none of the above

to provide low impedance

to discharge the charging capacitance to ground

protection for operating personnel

both 1) to discharge the charging capacitance to ground and 2) protection for operating personnel

voltage potential at the earth mat increases due to earthing

voltage potential at the earth mat decreases due to earthing

voltage potential at the earth mat remains zero irrespective of fault

none of the above

to provide as low resistance possible to the ground

to provide as high resistance possible to the ground

to provide flow of positive, negative and zero sequence currents

none of the above