NCCER 201 EXAM QUESTIONS AND ANSWERS
Each of two equal capacitors in series has_____.
half the applied voltage
A circuit has a peak voltage of 310V. What is the average voltage value?
197V
What is the apparent power of an AC circuit with a source voltage of 240V and a total
current of 15A?
3,600 W
According to the power triangle, the apparent power is _____.
greater than the true power
What is the step-down turns ratio of a transformer with 150 turns in the primary and 50
turns in the secondary?
3;1
What is the true power in a 2A series RL circuit with a 50Ω resistor?
200 W
If the time for one cycle is 0.2 seconds, the frequency is _____.
5Hz
Transformers in which the primary and secondary voltages are 180 degrees out of
phase are known as _____.
Unlike-wound transformer
Opening the secondary circuit of a current transformer under load will cause a
dangerous level of _____.
induced high voltage
The opposing force that an inductor presents to the flow of alternating current is called
_____.
inductive reactance
The product of the source voltage and the total current is_____.
apparent power
Each of two equal capacitors in series has_____.
half the applied voltage
A circuit has a peak voltage of 310V. What is the average voltage value?
197V
What is the apparent power of an AC circuit with a source voltage of 240V and a total
current of 15A?
3,600 W
According to the power triangle, the apparent power is _____.
greater than the true power
What is the step-down turns ratio of a transformer with 150 turns in the primary and 50
turns in the secondary?
3;1
What is the true power in a 2A series RL circuit with a 50Ω resistor?
200 W
If the time for one cycle is 0.2 seconds, the frequency is _____.
5Hz
Transformers in which the primary and secondary voltages are 180 degrees out of
phase are known as _____.
Unlike-wound transformer
Opening the secondary circuit of a current transformer under load will cause a
dangerous level of _____.
induced high voltage
The opposing force that an inductor presents to the flow of alternating current is called
_____.
inductive reactance
The product of the source voltage and the total current is_____.
apparent power
