G GRADE A Q&A
Assuming a purely inductive circuit, - (correct answer)current will lag the voltage by 90
degrees
The true power used or consumed in a purely inductive circuit is - (correct answer)zero
watts
The power factor of a purely inductive circuit is ? - (correct answer)0%
In a purely capacitive circuit - (correct answer)current will lead the voltage by 90° .
The true power used or consumed in a purely capacitive circuit is - (correct answer)zero
watts
The power factor of a purely capacitive circuit is ? - (correct answer)0%
What is the phase relationship between voltage and current in a purely resistive circuit?
- (correct answer)Voltage and current are in-phase
In a purely resistive circuit - (correct answer)100% of the apparent power is used or
consumed.
The power factor of a purely resistive circuit is ? . - (correct answer)100%
The addition of resistance to a reactive series circuit always decreases the phase angle
- (correct answer)and increases the power factor of the circuit
Circuits that contain both resistance and reactance must have a power factor
somewhere between 0% and 100% - (correct answer)and a phase angle between 0°
and 90° .
, The power factor of a purely resistive circuit is ? - (correct answer)100%
True power is dissipated as heat - (correct answer)true
Power factor is the ratio of the - (correct answer)true power to the apparent power
Power factor is defined as the cosine of theta, . - (correct answer)and it can be
calculated by dividing the kilowatts in the power triangle by the kilovolt-amperes
Poor power factor is normally caused by inductive loads - (correct answer)true
Power factor is normally corrected by adding a(n) capacitor . - (correct answer)in
parallel with the load
Which of the factors listed contributes to the economic feasibility of making power factor
corrections - (correct answer)Lower bill, Smaller conductors, Smaller controllers,
Smaller fuses
When capacitors are not switched from the line when the devices they correct are
turned off, they should have their own disconnects - (correct answer)true
The maximum benefit is realized when the capacitors are placed at the load (or point of
consumption - (correct answer)true
AC voltage is voltage in a circuit that reverses its direction of flow at regular intervals
and - (correct answer)is stated and measured as a peak, average, or rms value
The peak value of a sine wave is . - (correct answer)the maximum instantaneous value
of either the positive or negative values in the sine wave
Assuming a purely inductive circuit, - (correct answer)current will lag the voltage by 90
degrees
The true power used or consumed in a purely inductive circuit is - (correct answer)zero
watts
The power factor of a purely inductive circuit is ? - (correct answer)0%
In a purely capacitive circuit - (correct answer)current will lead the voltage by 90° .
The true power used or consumed in a purely capacitive circuit is - (correct answer)zero
watts
The power factor of a purely capacitive circuit is ? - (correct answer)0%
What is the phase relationship between voltage and current in a purely resistive circuit?
- (correct answer)Voltage and current are in-phase
In a purely resistive circuit - (correct answer)100% of the apparent power is used or
consumed.
The power factor of a purely resistive circuit is ? . - (correct answer)100%
The addition of resistance to a reactive series circuit always decreases the phase angle
- (correct answer)and increases the power factor of the circuit
Circuits that contain both resistance and reactance must have a power factor
somewhere between 0% and 100% - (correct answer)and a phase angle between 0°
and 90° .
, The power factor of a purely resistive circuit is ? - (correct answer)100%
True power is dissipated as heat - (correct answer)true
Power factor is the ratio of the - (correct answer)true power to the apparent power
Power factor is defined as the cosine of theta, . - (correct answer)and it can be
calculated by dividing the kilowatts in the power triangle by the kilovolt-amperes
Poor power factor is normally caused by inductive loads - (correct answer)true
Power factor is normally corrected by adding a(n) capacitor . - (correct answer)in
parallel with the load
Which of the factors listed contributes to the economic feasibility of making power factor
corrections - (correct answer)Lower bill, Smaller conductors, Smaller controllers,
Smaller fuses
When capacitors are not switched from the line when the devices they correct are
turned off, they should have their own disconnects - (correct answer)true
The maximum benefit is realized when the capacitors are placed at the load (or point of
consumption - (correct answer)true
AC voltage is voltage in a circuit that reverses its direction of flow at regular intervals
and - (correct answer)is stated and measured as a peak, average, or rms value
The peak value of a sine wave is . - (correct answer)the maximum instantaneous value
of either the positive or negative values in the sine wave
