A load draws 50 kVAR of reactive power and 100 kW of real power. What is the apparent power of the load?
Anonymous Quiz
26%
A) 150 kVA
52%
B) 111.8 kVA
13%
C) 75 kVA
9%
D) 100 kVA.
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In a 220 kV substation, what is the typical Basic Insulation Level (BIL) required?
Anonymous Quiz
31%
a) 350 kV
39%
b) 650 kV
24%
c) 1050 kV
6%
d) 1550 kV
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Which type of insulation coordination study is critical for substation design?
Anonymous Quiz
14%
a) Thermal analysis
52%
b) Lightning and switching surge analysis
10%
c) Harmonic analysis
24%
d) Load flow analysis
👍1
In a Gas Insulated Substation (GIS), what is the primary reason for using SF6 gas over air as an insulating medium?
Anonymous Quiz
2%
a) Lower cost
86%
b) Higher dielectric strength and smaller equipment size
7%
c) Better thermal conductivity
5%
d) Reduced maintenance
❤1
Which fault type requires the highest interrupting capacity in a substation circuit breaker?
Anonymous Quiz
25%
a) Single line-to-ground fault
15%
b) Line-to-line fault
50%
c) Three-phase fault
11%
d) Double line-to-ground fault
Why is a Petersen coil used in some substation grounding systems?
Anonymous Quiz
19%
a) To limit overvoltages during lightning strikes
53%
b) To suppress arcing ground faults in ungrounded systems
0%
c) To improve power factor
28%
d) To reduce short-circuit currents
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