Timedora
Free Practice Quiz Question List

5 Remote Sensing and Imagery Online Quiz Questions

Use this free practice quiz with 20 questions to review 5 Remote Sensing and Imagery, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

A team needs imagery of the same wetland repeatedly to track seasonal change. Which resolution property should it prioritize?

  1. A

    Spatial resolution

  2. B

    Temporal resolution

  3. C

    Radiometric resolution

  4. D

    Spectral resolution

02
Choose one
1 point

An analyst needs to collect imagery at night and expects cloud cover. Which sensor is the most suitable choice from this list?

  1. A

    A passive visible-light camera

  2. B

    A passive thermal camera

  3. C

    An active radar sensor

  4. D

    A passive near-infrared camera

03
Choose one
1 point

In an image composite, healthy vegetation appears red or pink. Which explanation best accounts for this appearance?

  1. A

    It must be a true-color composite because plants are naturally red.

  2. B

    Near-infrared may have been assigned to the display's red channel.

  3. C

    The image must be showing a thermal band as blue.

  4. D

    Vegetation absorbs all near-infrared energy, making it look red.

04
Choose all
1 point

Which statements correctly describe active remote-sensing sensors? Select all that apply.

  1. A

    Radar sends microwave pulses.

  2. B

    A visible-light camera measures reflected sunlight and is therefore active.

  3. C

    Lidar sends laser pulses.

  4. D

    A thermal camera is active because it measures heat emitted by Earth's surface.

05
Choose all
1 point

Which statements support cautious interpretation of an image? Select all that apply.

  1. A

    Clouds and haze can obscure or alter the signal.

  2. B

    Similar materials can look alike in imagery.

  3. C

    A shadow always identifies the feature that cast it.

  4. D

    Comparing another date or reference data can help when identification matters.

06
True or false
1 point

A 10-meter pixel represents a smaller ground area than a 30-meter pixel. This means every 10-meter feature in the image is guaranteed to be distinguishable.

  1. A

    True

  2. B

    False

07
True or false
1 point

If an image displays vegetation as red, the vegetation must actually be red on the ground.

  1. A

    True

  2. B

    False

08
Written response
1 point

What term describes a surface's pattern of reflection or emission across different wavelengths?

09
Written response
1 point

A pixel has near-infrared reflectance 0.60.6 and red reflectance 0.20.2. Using NDVI=NIR−RedNIR+Red\mathrm{NDVI}=\frac{\mathrm{NIR}-\mathrm{Red}}{\mathrm{NIR}+\mathrm{Red}}, what is its NDVI?

10
Fill in the blank
1 point

In a raster image, each grid cell is called a .

11
Fill in the blank
1 point

The resolution describing a sensor's ability to record differences in energy is resolution.

12
Open ended
1 point

A GIS analyst receives a raster whose pixel values are numbers, but the units and processing history are unclear. Explain why the analyst should not assume the values are direct measurements in familiar units, and identify what information should be checked before analysis.

13
Choose one
1 point

A raster appears shifted relative to other GIS layers. Which set of properties is most directly relevant to checking its spatial alignment?

  1. A

    Its true-color display and sensor's temporal resolution

  2. B

    Its band count and radiometric resolution only

  3. C

    Its cell size, coordinate reference system, and georeferencing

  4. D

    Its pixel values and whether it is passive or active imagery

14
Written response
1 point

Which active sensing technology uses laser pulses to measure surface height and structure?

15
Choose one
1 point

A multispectral image is stored as a multiband raster. What does each pixel store?

  1. A

    One value shared by every pixel in the image

  2. B

    A value for each band at each pixel

  3. C

    Only the displayed color of each pixel

  4. D

    The coordinates of every feature

16
True or false
1 point

Hyperspectral imagery records many narrow, closely spaced bands.

  1. A

    True

  2. B

    False

17
Written response
1 point

Which resolution property describes how finely wavelengths are divided into bands? Enter the two-word term.

18
Choose one
1 point

A false-color composite assigns near-infrared wavelengths to the display’s red channel. How might healthy vegetation appear?

  1. A

    It must appear green because vegetation is green in nature.

  2. B

    It will always appear black because people cannot see near-infrared.

  3. C

    It may appear red or pink.

  4. D

    It will appear the same as in a true-color image.

19
Choose one
1 point

Which image-resolution property describes which wavelengths are measured and how finely they are divided into bands?

  1. A

    Spatial resolution

  2. B

    Spectral resolution

  3. C

    Radiometric resolution

  4. D

    Temporal resolution

20
Choose one
1 point

How does a 10-meter pixel compare with a 30-meter pixel in spatial resolution?

  1. A

    A 10-meter pixel represents a smaller ground area than a 30-meter pixel.

  2. B

    A 30-meter pixel represents a smaller ground area than a 10-meter pixel.

  3. C

    Pixel size alone guarantees that every feature of that size can be distinguished.

  4. D

    The comparison describes how often the sensor observes the area.