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Electrical Engineering - Three-Phase Systems in Power Applications

Exercise : Three-Phase Systems in Power Applications - General Questions
11.
A three-phase generator is connected to three 90 load resistors. Each coil generates 120 V ac. A common neutral line exists. How much current flows through the common neutral line?
0 A
1.33 A
3.99 A
2.66 A
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
Compare the total copper cross sections in terms of current-carrying capacity for a single-phase and a three-phase 120 V system with effective load resistance of 15 .
single-phase 32 A; three-phase 16 A
single-phase 16 A; three-phase 8 A
single-phase 8 A; three-phase 4 A
single-phase 16 A; three-phase 0 A
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
If in a Y-connected ac generator, each phase voltage has a magnitude of 90 VRMS, what is the magnitude of each line voltage?
0 V
90 V
156 V
180 V
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
Polyphase generators produce simultaneous multiple sinusoidal voltages that are separated by
certain constant phase angles
certain constant frequencies
certain constant voltages
certain constant currents
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
In a balanced three-phase load, each phase has
an equal amount of power
one-third of total power
two-thirds of total power
a power consumption equal to IL
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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