2
1-10. If a wave has a velocity of 4,800 feet per
second and a wave-length of 5 feet, what
is the frequency of the wave?
1. 9.6 Hz
2. 96 Hz
3. 960 Hz
4. 9,600 Hz
Figure 1-A.—Waveform.
IN ANSWERING QUESTIONS 1-11
THROUGH 1-15, REFER TO FIGURE 1-A.
1-11. The waveform in the figure is what type
of wave?
1. Sine
2. Square
3. Sawtooth
4. Trapezoidal
1-12. The distance between which of the
following points represents the
completion of a full cycle of alternating
current?
1. A to C
2. B to D
3. C to E
4. D to F
1-13. The distance between which of the
following points represents a full
wavelength?
1. A to D
2. A to E
3. D to E
4. E to F
1-14. What is the frequency of the wave?
1. 0.5 Hz
2. 2.5 Hz
3. 5.0 Hz
4. 7.5 Hz
1-15. What is the period of the wave?
1. 100 milliseconds
2. 200 milliseconds
3. 250 milliseconds
4. 500 milliseconds
Figure 1-B.—Wave angles.
IN ANSWERING QUESTIONS 1-16
THROUGH 1-19, REFER TO FIGURE 1-B.
1-16. What line in the figure indicates the
incident wave?
1. A to B
2. B to E
3. C to B
4. D to H
1-17. Angle "x" is which of the following
angles?
1. Normal
2. Incidence
3. Reflection
4. Refraction
