Electronics ETA AC Certification Practice
Exam Questions With Complete Solutions
In alternating current: A. current flow alternates back and
forth B. voltage alternates positive and negative C. resistance
changes between high and low D. A and B above - Correct
Answers ✅D. A and B above
Historically, DC came before AC because: A. DC is more
useful B. DC is easier to transmit over long distances C. AC
requires more advanced technology D. AC is less efficient -
Correct Answers ✅C. AC requires more advanced
technology
An AC voltage source schematic symbol: A. is a sine wave in
a circle B. represents an idealized voltage source C. is
considered to have zero internal resistance D. all of the above
- Correct Answers ✅D. all of the above
The opposition to current flow presented by capacitors and
inductors is called: A. Resistance B. Reactance C. Impedance
D. Reluctance - Correct Answers ✅D. Reluctance
Impedance is: A. any combination of resistance and
reactance B. another name for resistance C. another name
for reactance D. measured in watt-hours - Correct Answers
✅A. any combination of resistance and reactance
AC voltage, current, resistance and power are often indicated
by: A. lower-case letters B. smaller-type letters C. Greek
,Electronics ETA AC Certification Practice
Exam Questions With Complete Solutions
symbols D. letters in parentheses - Correct Answers ✅A.
lower-case letters
The quadrants in a 4-quadrant X-Y graph are: A. 1, 2, 3, 4,
clockwise from upper right B. A, B, C, D, clockwise from upper
left C. I, II, III, IV, counter-clockwise from upper left D. I, II, III,
IV, counter-clockwise from upper right - Correct Answers
✅D. I, II, III, IV, counter-clockwise from upper right
A phasor is: A. an arrow with a specific magnitude and
direction B. often used to represent voltage or current C.
considered to be rotating counter-clockwise D. all of the
above - Correct Answers ✅D. all of the above
In a right triangle: A. all the internal angles add up to 90O B.
one internal angle is 90O C. all the internal angles are the
same D. every internal angle is 90O - Correct Answers ✅D.
every internal angle is 90*
In the illustration at right, the Opposite, Adjacent and
Hypotenuse are, respectively: A. 3,2,1 B. 3,1,2 C. 2,3,1 D.
2,1,3 - Correct Answers ✅A. 3,2,1
The sine, cosine and tangent of a right triangle are,
respectively: A. Op / Adj, Adj / Op, Hyp / Adj B. Op / Hyp, Adj /
Hyp, Op / Adj C. Adj / Op, Adj / Hyp, Op / Hyp D. Hyp / Op,
, Electronics ETA AC Certification Practice
Exam Questions With Complete Solutions
Hyp/ Adj, Op / Adj - Correct Answers ✅B. Op / Hyp, Adj /
Hyp, Op / Adj
π is approximately: A. 0.707 B. 6.3 C. 3.14 D. 3.142 - Correct
Answers ✅C. 3.14
The circumference of a circle is: A. π x radius squared B. π x
radius C. π x diameter D. π / diameter - Correct Answers
✅C. π x diameter
A radian: A. is the same length as a radius B. if multiplied by
2π, equal to circumference C. the same length as a diameter
D. A and B above - Correct Answers ✅D. A and B above
Angular velocity is: A. the speed of a phasor tip B. the Greek
letter ω C. π times frequency D. all of the above -
Correct Answers ✅D. all of the above
An imaginary number corresponds to: A. a point on the X-axis
to the left of the origin B. a point in quadrant III C. a point on
the Y-axis D. a point in quadrant IV - Correct Answers ✅C.
a point on the Y-axis
Translate angular coordinates 3, 45* to X,Y coordinates.
Truncate to two places. A. 0.71, j0.71 B. 2.12, j2.12 C. 4.2,
j4.2 D. 4.2, -j4.2 - Correct Answers ✅B. 2.12, j2.12
Exam Questions With Complete Solutions
In alternating current: A. current flow alternates back and
forth B. voltage alternates positive and negative C. resistance
changes between high and low D. A and B above - Correct
Answers ✅D. A and B above
Historically, DC came before AC because: A. DC is more
useful B. DC is easier to transmit over long distances C. AC
requires more advanced technology D. AC is less efficient -
Correct Answers ✅C. AC requires more advanced
technology
An AC voltage source schematic symbol: A. is a sine wave in
a circle B. represents an idealized voltage source C. is
considered to have zero internal resistance D. all of the above
- Correct Answers ✅D. all of the above
The opposition to current flow presented by capacitors and
inductors is called: A. Resistance B. Reactance C. Impedance
D. Reluctance - Correct Answers ✅D. Reluctance
Impedance is: A. any combination of resistance and
reactance B. another name for resistance C. another name
for reactance D. measured in watt-hours - Correct Answers
✅A. any combination of resistance and reactance
AC voltage, current, resistance and power are often indicated
by: A. lower-case letters B. smaller-type letters C. Greek
,Electronics ETA AC Certification Practice
Exam Questions With Complete Solutions
symbols D. letters in parentheses - Correct Answers ✅A.
lower-case letters
The quadrants in a 4-quadrant X-Y graph are: A. 1, 2, 3, 4,
clockwise from upper right B. A, B, C, D, clockwise from upper
left C. I, II, III, IV, counter-clockwise from upper left D. I, II, III,
IV, counter-clockwise from upper right - Correct Answers
✅D. I, II, III, IV, counter-clockwise from upper right
A phasor is: A. an arrow with a specific magnitude and
direction B. often used to represent voltage or current C.
considered to be rotating counter-clockwise D. all of the
above - Correct Answers ✅D. all of the above
In a right triangle: A. all the internal angles add up to 90O B.
one internal angle is 90O C. all the internal angles are the
same D. every internal angle is 90O - Correct Answers ✅D.
every internal angle is 90*
In the illustration at right, the Opposite, Adjacent and
Hypotenuse are, respectively: A. 3,2,1 B. 3,1,2 C. 2,3,1 D.
2,1,3 - Correct Answers ✅A. 3,2,1
The sine, cosine and tangent of a right triangle are,
respectively: A. Op / Adj, Adj / Op, Hyp / Adj B. Op / Hyp, Adj /
Hyp, Op / Adj C. Adj / Op, Adj / Hyp, Op / Hyp D. Hyp / Op,
, Electronics ETA AC Certification Practice
Exam Questions With Complete Solutions
Hyp/ Adj, Op / Adj - Correct Answers ✅B. Op / Hyp, Adj /
Hyp, Op / Adj
π is approximately: A. 0.707 B. 6.3 C. 3.14 D. 3.142 - Correct
Answers ✅C. 3.14
The circumference of a circle is: A. π x radius squared B. π x
radius C. π x diameter D. π / diameter - Correct Answers
✅C. π x diameter
A radian: A. is the same length as a radius B. if multiplied by
2π, equal to circumference C. the same length as a diameter
D. A and B above - Correct Answers ✅D. A and B above
Angular velocity is: A. the speed of a phasor tip B. the Greek
letter ω C. π times frequency D. all of the above -
Correct Answers ✅D. all of the above
An imaginary number corresponds to: A. a point on the X-axis
to the left of the origin B. a point in quadrant III C. a point on
the Y-axis D. a point in quadrant IV - Correct Answers ✅C.
a point on the Y-axis
Translate angular coordinates 3, 45* to X,Y coordinates.
Truncate to two places. A. 0.71, j0.71 B. 2.12, j2.12 C. 4.2,
j4.2 D. 4.2, -j4.2 - Correct Answers ✅B. 2.12, j2.12
