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Subel. A
A
48 questions
B
60 questions
C
60 questions
D
24 questions
E
48 questions
F
60 questions
G
36 questions
H
18 questions
I
18 questions
J
30 questions
K
36 questions
L
48 questions
M
18 questions
N
30 questions
O
30 questions
P
24 questions
Q
12 questions
6 questions
1
2
3
4
5
6
7
8
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Subelement A
Principles
Section 7
Waveforms
3
7A1
What is a sine wave?
A.
A constant-voltage, varying-current wave.
Correct Answer
B.
A wave whose
amplitude
at any
given
instant
can
be
represented
by the
projection
of a
point
on a
wheel
rotating
at a
uniform
speed
.
C.
A wave following the laws of the trigonometric tangent function.
D.
A wave whose polarity changes in a random manner.
3
7A1
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3
7A2
How many degrees are there in one complete sine wave cycle?
A.
90 degrees.
B.
270 degrees.
C.
180 degrees.
Correct Answer
D.
360
degrees.
3
7A2
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3
7A3
What type of wave is made up of sine waves of the fundamental frequency and all the odd harmonics?
Correct Answer
A.
Square
.
B.
Sine.
C.
Cosine.
D.
Tangent.
3
7A3
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3
7A4
What is the description of a square wave?
A.
A wave with only 300 degrees in one cycle.
B.
A wave whose periodic function is always negative.
C.
A wave whose periodic function is always positive.
Correct Answer
D.
A wave that
abruptly
changes
back
and
forth
between
two
voltage
levels
and
stays
at these
levels
for
equal
amounts
of
time
.
3
7A4
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3
7A5
What type of wave is made up of sine waves at the fundamental frequency and all the harmonics?
Correct Answer
A.
Sawtooth
wave.
B.
Square wave.
C.
Sine wave.
D.
Cosine wave.
3
7A5
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3
7A6
What type of wave is characterized by a rise time significantly faster than the fall time (or vice versa)?
A.
Cosine wave.
B.
Square wave.
Correct Answer
C.
Sawtooth
wave.
D.
Sine wave.
3
7A6
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