Three-Phase Systems in Power Applications - General Questions Online Exam Quiz
Three-Phase Systems in Power Applications - General Questions GK Quiz. Question and Answers related to Three-Phase Systems in Power Applications - General Questions. MCQ (Multiple Choice Questions with answers about Three-Phase Systems in Power Applications - General Questions
In a three-phase system, the voltages are separated by
Options
A : 45°
B : 90°
C : 120°
D : 180°
In a three-phase system, when the loads are perfectly balanced, the neutral current is
Options
A : zero
B : one-third of maximum
C : two-thirds of maximum
D : at maximum
In a -connected source driving a -connected load, the
Options
A : load voltage and line voltage are one-third the source voltage for a given phase
B : load voltage and line voltage are two-thirds the source voltage for a given phase
C : load voltage and line voltage cancel for a given phase
D : load voltage, line voltage, and source phase voltage are all equal for a given phase
In a certain three-wire Y-connected generator, the phase voltages are 2 kV. The magnitudes of the line voltages are
Options
A : 2,000 V
B : 6,000 V
C : 666 V
D : 3,464 V
In a -connected source feeding a Y-connected load,
Options
A : each phase voltage equals the difference of the corresponding load voltages
B : each phase voltage equals the corresponding load voltage
C : each phase voltage is one-third the corresponding load voltage
D : each phase voltage is 60° out of phase with the corresponding load voltage
In a Y-Y source/load configuration, the
Options
A : phase current, the line current, and the load current are all equal in each phase
B : phase current, the line current, and the load current are 120° out of phase
C : phase current and the line current are in phase, and both are 120° out of phase with the load current
D : line current and the load current are in phase, and both are out of phase with the phase current
In a Y-connected circuit, the magnitude of each line current is
Options
A : one-third the phase current
B : three times the corresponding phase current
C : equal to the corresponding phase current
D : zero
A constant load power means a uniform conversion of
Options
A : mechanical to electrical energy
B : electrical to mechanical energy
C : current to voltage
D : voltage to current
A two-phase generator is connected to two 90 load resistors. Each coil generates 120 V ac. A common neutral line exists. How much current flows through the common neutral line?
Options
A : 1.33 A
B : 1.88 A
C : 2.66 A
D : 1.77 A
A single-phase sinusoidal voltage of 120 V is connected to a 90 load. Current in the circuit is
Options
A : 13.3 mA
B : 133 mA
C : 1.33 A
D : 6.2 A
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