Earthing / Grounding Quiz Questions

During fault condition, proper earthing will rise the earth potential

• true

• false

When the 3-phase system is not grounded and if Single Line to Ground fault occurs, the voltage of the other two healthy phases will:

• increases

• decreases

• Remains unaffected

The grounded conductor can be used as the current carrying conductor to accommodate all the non neutral related loads

• true

• false

Electrical system is grounded in order to protect ___ from faults

• Electrical equipment

• Humans

• Both Electrical Equipment and Humans

• Neither Electrical Equipment nor Humans

Which of the following type of grounding system has the highest probability for escalation of ground fault to phase to phase and three phase arcing fault, particularly for low voltage system:

• Solid grounding

• Resistance grounding

• Reactance grounding

• All the options are correct

the ungrounded system, in reality is a ______ grounding system:

• C

• L

• R

• Combination of Inductance and Resistance

Which of the following system produces highest ground fault current when a fault to ground occurs:

• Solid grounding system

• Ungrounded sytem

• Resistance grounding system

• Reactance grounding system

In an ungrounded system the occurrence of second fault will more likely be ____ than grounded system fault

• More Severe

• less Severe

In order to achieve Continuity of the operation even during fault condition which type of the configuration is preferred:

• Grounded System

• Ungrounded system

High Resistance grounding typically limits ground fault current under to _____:

• 25A

• 100A

• 50A

• 500 A