
Substation Installations Quiz
Authored by Xin Liu
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Professional Development
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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of earthing resistance in substation installations?
To increase voltage
To prevent electrical shock
To enhance current flow
To reduce power consumption
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
At what temperature does the effect on soil resistivity become negligible?
10°C
0°C
5°C
-5°C
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to soil resistivity when the temperature is more than 0°C?
It decreases
It remains constant
It becomes negligible
It increases
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the range of soil resistivity?
1 to 100 ohm-m
1 to 1000 ohm-m
10 to 100 ohm-m
10 to 1000 ohm-m
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the abbreviation for earth fault loop impedance?
Zf
Zs
Ze
Zc
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does a higher earth fault loop impedance indicate?
Higher fault current
Lower fault current
Faster circuit protection operation
Increased power consumption
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of transformer is used for generating a fault current to neutral?
Step-down transformer
Grounding transformer
Isolation transformer
Auto transformer
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