![](media/image1.png){width="1.1041666666666667in"
height="1.0680555555555555in"}**Doppler Radar - Review Questions**

1.  Doppler radar emits short bursts of radio waves called

    a.  pulses

    b.  digits

    c.  signals

    d.  radar data units (RDU)

2.  What additional information aside from reflectivity can the Doppler
    radar provide?

    a.  rotational intensity

    b.  radial velocity

    c.  relational vorticity

3.  A collection of preset elevation slices that the radar sweeps
    through is called a(n)

    a.  elevation coverage product (ECP)

    b.  vacuum continuity product (VCP)

    c.  volume coverage pattern (VCP)

    d.  elevation coverage pattern (ECP)

4.  Once the radar has swept through all of the preset elevation angles
    a \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ is completed.

    a.  level scan

    b.  volume scan

    c.  linear scan

    d.  radar scan

5.  Rain and hail will typically be displayed on what radar product?

    a.  velocity

    b.  reflectivity

    c.  rain/hail

    d.  wind

6.  An appendage or hook shape to the reflectivity echo usually
    indicates that a thunderstorm is \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.

    a.  dissipating

    b.  growing

    c.  rotating

    d.  splitting

7.  There are \_\_\_\_\_\_\_ WSR-88D Doppler radars in operation in the
    nation, including the U.S. Territory of Guam and the Commonwealth of
    Puerto Rico.

    a.  85

    b.  105

    c.  137

    d.  155

8.  The total accumulative time the Doppler radar is transmitting a
    radar signal is \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.

    a.  7 seconds

    b.  70 seconds

    c.  7 minutes

    d.  17 minutes

9.  This phenomenon, called \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_, is
    where the radar beam bends more than normal and is curved more
    toward the earth\'s surface.

    a.  subrefraction

    b.  superrefraction

    c.  subreflection

    d.  superreflection

10. The atmospheric condition that causes superrefraction which bends
    the radar beam equal to or more than the earth\'s curvature is
    called \_\_\_\_\_\_\_\_\_\_\_\_\_.

    a.  tubing

    b.  ducting

    c.  tunneling

    d.  anomalous propagation

11. The best way to determine which way rainfall, as indicted by radar,
    is moving is to\...

    a.  look at the radial velocity image.

    b.  view the storm relative motion image.

    c.  look at the one-hour precipitation image.

    d.  view a loop of the reflectivity images.

12. Weather warnings are displayed on the Doppler radar in what four
    colors\...

    a.  red, orange, yellow, and purple.

    b.  yellow, red, green, and purple.

    c.  red, yellow, green, and blue.

    d.  green, orange, purple, and blue.

13. The time listed on the NWS Doppler radar images is in
    \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_

    a.  z-time

    b.  c-time.

    c.  Daylight Saving Time

    d.  Eastern Standard Time

14. Which of the following Doppler radar images is not available from
    the NWS is\...

    a.  One-hour Precipitation.

    b.  Base Velocity.

    c.  Composite Velocity.

    d.  Composite Reflectivity.

15. In the velocity images from the NWS Doppler radar, red colors mean
    the wind is \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ and the green colors
    mean the wind is \_\_\_\_\_\_\_\_\_\_\_\_\_\_.

    a.  moving toward from the radar, moving away the radar

    b.  moving away from the radar, moving toward the radar

    c.  moving faster, moving slower

    d.  moving slower, moving faster

16. AP stands for\...

    a.  almost precipitation

    b.  any precipitation

    c.  after propagation

    d.  anomalous propagation

17. When viewing the Doppler radar velocity images (Base Velocity and
    Storm Relative Motion), red colors indicated wind moving toward the
    radar and green colors mean wind is moving away from the radar.

    a.  True

    b.  False

18. The term for the bending of the radar beam through the atmosphere is
    called\...

    a.  Contraction

    b.  Refraction

    c.  Diffraction

    d.  Reflection

19. On the RIDGE radar base reflectivity display, the color green
    indicates all of the following except\...

    a.  inbound wind.

    b.  a value of energy returned to the radar after bouncing off an
        object.

    c.  the beginning of light rain.

    d.  the color of the 20 dBZ level.

20. In this modern age, the NWS Doppler radar image presents an accurate
    picture of the current weather within the range of the radar site.

    a.  True

    b.  False.