WorksheetsGrounding System
Total questions: 15
Worksheet time: 15mins
What type of grounding it is if the earth ground is connected to the
neutral points of current carrying conductor of a transformer or other
machines?
Earth grounding
Equipment grounding
Ground fault
System grounding
What type of grounding it is if the earth ground is connected to non-conducted materials such as conduit, cable tray?
Earth grounding
Equipment grounding
Ground fault
System grounding
What Is a Good Ground Resistance Value?
Zero ohm
Less than 5 ohm
5 ohms
More than 5 ohms
What is the minimum depth of a ground rod according to the NEC?
4 Feet
6 Feet
8 Feet
10 Feet
How do we call the connection of ground wire to the ground rod?
Bonding
Grounding
Soldering
Welding
How do we call the electrical system’s connection to the ground itself?
Bonding
Grounding
Soldering
Welding
What type of grounding is for the purpose of controlling the voltage to earth, or ground, within predictable limits?
Earth grounding
Equipment grounding
Ground fault
System grounding
What method of grounding is used to measure the resistance-to-ground of existing grounding systems?
Oscilating Voltage
Fall of Potential
Clamp On
Ground Resistance Monitoring
What method of grounding is for measuring the resistance-to-ground of a grounding system or electrode?
Oscilating Voltage
Fall of Potential
Clamp On
Ground Resistance Monitoring
It is induced into the grounding system at a point where it will be forced into the soil and return through the utility neutral.
Oscilating Voltage
Fall of Potential
Clamp On
Ground Resistance Monitoring
The process of automated timed and/or continuous resistance-to ground measurement.
Oscilating Voltage
Fall of Potential
Clamp On
Ground Resistance Monitoring
On equipment with single ground the ground can be considered satisfactory if the voltage drop is in line with item 1 above and at least __________ flow to the ground conductor under test into the grid.
150 A
200 A
250 A
300 A
On equipment with multigrounds, a ground can be considered satisfactory if the voltage drop is in line with item 1 above and at least __________ flow to the ground conductor under test into the grid.
150 A
200 A
250 A
300 A
To test transformer neutral or reference point pass_________ through the transformer neutral at a point above grade but below any bonding connections or clamps on the tank.
150 A
200 A
250 A
300 A
This is the advantages of proper grounding EXCEPT ONE:
Eliminates shock hazard
Protects equipment from voltage
Prevents electrical fires
High resistance is provided in order to trip or short circuit a breaker
In the event of an electrical fault
