NCCER 26201 : Alternating Current - Electromagnetic Induction - (AC) Circuits Exam Test Combined Questions With Revised Correct Answers BEST UPDATED COMBINED SET!!
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Course
NCCER
Institution
NCCER
NCCER 26201 : Alternating Current - Electromagnetic Induction - (AC)
Circuits
Exam Test Combined Questions
With Revised Correct Answers
BEST UPDATED COMBINED SET!!
20. according to the power triangle, the apparent power
is ______. - ANSWER
(C) greater than the true power
21....
NCCER 26201 : Alternating Current
- Electromagnetic Induction - (AC)
Circuits
Exam Test Combined Questions
With Revised Correct Answers
BEST UPDATED COMBINED SET!!
1. The step down turns ratio of a transformer with 200
Turns in the primary and 100 turns in the secondary is ? -
ANSWER 2:1
2. Opening the secondary of a CT under load will cause a
dangerous level of ? - ANSWER Induce high voltage
3. what is the hertz rating of an AC circuit is ? If the
frequency is 20 cycles per 1/2 seconds ? - ANSWER
40Hz
, 4. Given: A circuit has an RMS voltage of 120VAC. what is
the peak-to-peak voltage? - ANSWER 340V
5. A circuit has a peak voltage of 275V. What is the
average voltage value? - ANSWER 175V
6. each of three equal capacitors in series has _____. -
ANSWER one-third the applied voltage
7. The formula for inductive reactance is ? - ANSWER
XL=2mfl
8. Given: An AC circuit containing resistance only. what
is the current flow if the resistance is 15 ohms voltage is
150 - ANSWER 10A
9. the current in an inductive current - ANSWER (C)
lags the voltage
, 10. unless otherwise noted, the calculations in AC
circuits use. - ANSWER (D) rms values
11. when frequency decreases, capacitive reactance
_____. - ANSWER (A) increases
12. which of the following is true currents and a
capacitive circuit? - ANSWER (A) it leads the voltage
13. in sine wave terminology, the average value is
______ ? - ANSWER (A) .637 × peak value
14. In AC circuits containing only resistance ______. -
ANSWER (A) all DC rules and laws apply, including
Ohm's law
15. if the area of the plates of a capacitor is increased,
the amount of capacitance _____. - ANSWER (B)
increases
, 16. the self-induced voltage across an inductance is
equal to the change in _____. - ANSWER (A) current
with respect to time
17. Given: 30 microfarad capacitor in parallel with a 15
microfarad capacitor ? - ANSWER (C) 45
18. which of the following opposes any change in circuit
current? - ANSWER (C) Inductance
19. ELI THE ICE MAN is used to remember _____. -
ANSWER (A) The phase relationship that exist
between the voltage and the current in an inductive
circuit can be remembered by
20. according to the power triangle, the apparent power
is ______. - ANSWER (C) greater than the true power
21. which of the following uses electromagnetic
inductions to transfer electrical energy from one circuit
to another. - ANSWER (C) Transformer
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