Wed. Jun 19th, 2024

Coastal Geomorphology

  1. Which of the following is NOT an agent of coastal erosion?

    Options:
    1. Sea waves
    2. Oceanic currents
    3. Tidal waves
    4. Rivers

    Option: D

  2. The most powerful and effective erosive agent of coastal areas is

    Options:
    1. Tidal waves
    2. Tsunamis
    3. Oceanic currents
    4. Sea waves

    Option: D

  3. What are swells?

    Options:
    1. Undulations of sea water characterized by well-developed crests and troughs
    2. Low, broad, regular and rounded ridges and troughs of water
    3. A regular pattern of smooth, rounded waves that characterize the surface of the ocean during fair weather
    4. The upper and lower parts of the waves

    Option: B

  4. What is fetch?

    Options:
    1. The height of wind-generated sea waves
    2. The distance between two successive crests or troughs of a sea wave
    3. The length of water surface over which the wind blows
    4. The time taken by a sea wave to cover the distance of one wavelength

    Option: C

  5. Wave velocity directly related to

    Options:
    1. Wave period
    2. Wave frequency
    3. Wavelength
    4. Wave height

    Option: C

  6. What is the relationship between wavelength and wave frequency?

    Options:
    1. There is a direct relationship
    2. There is an inverse relationship
    3. They are not related
    4. They are equal

    Option: B

  7. Do water particles within a wave in the seas and oceans move forward with coastward or landward advancing wave itself?

    Options:
    1. Yes, they move forward with the wave
    2. No, they move in a circular orbit
    3. They move both forward and in a circular orbit
    4. They do not move at all

    Option: B

  8. What is the orbital motion of water particle associated with the passage of a wave like in an open sea?

    Options:
    1. The orbit of particles decreases with increasing depth from the water surface towards the sea bottom
    2. The orbit of particles increases with increasing depth from the water surface towards the sea bottom
    3. The orbit of particles remains constant with increasing depth from the water surface towards the sea bottom
    4. The orbit of particles disappears with increasing depth from the water surface towards the sea bottom

    Option: A

  9. What do sea waves do after being generated?

    Options:
    1. They remain in the same area where they were generated
    2. They move randomly in different directions
    3. They radiate outward from the generating area of the sea
    4. They disappear after a short period of time

    Option: C

  10. The most important factor that determines the height of wind-generated sea waves is

    Options:
    1. Wave velocity
    2. Wave frequency
    3. Wave period
    4. The extent of fetch

    Option: D

  11. Which type of waves decay more rapidly while moving away from the generating area?

    Options:
    1. Waves with longer wavelengths and lower heights
    2. Waves with shorter wavelengths and greater heights
    3. Waves with irregular patterns
    4. Waves with medium wavelengths and heights

    Option: B

  12. What happens to the wavelength and wave height as waves approach the shore?

    Options:
    1. Both the wavelength and wave height increase
    2. Both the wavelength and wave height decrease
    3. Wavelength decreases and wave height increases
    4. Wavelength increases and wave height decreases

    Option: C

  13. What is the depth of water when waves begin to touch the bottom?

    Options:
    1. One-third of the wavelength
    2. Half of the wavelength
    3. One-fourth of the wavelength
    4. Twice the wavelength

    Option: B

  14. The turbulent forward-moving water is called as

    Options:
    1. Plunge line
    2. Swash
    3. Surf
    4. Breaker

    Option: B

  15. Which type of breaker is associated with steep waves?

    Options:
    1. Plunging breakers
    2. Spilling breakers
    3. Surging breakers
    4. None of the above

    Option: B

  16. The distance from the shore where waves break is called

    Options:
    1. Plunge line
    2. Swash
    3. Surf
    4. Breaker

    Option: A

  17. What causes plunging breakers?

    Options:
    1. When the velocities in the wave crest and wave body are almost equal
    2. When the wavelength and wave height are equal
    3. When the wave moves rapidly shoreward
    4. When the wave suffers from friction and distortion

    Option: A

  18. What is the difference between oscillatory waves and translatory waves?

    Options:
    1. Oscillatory waves move particles in circular orbits while translatory waves move particles forward at the same velocity as the wave form.
    2. Oscillatory waves move particles forward at the same velocity as the wave form while translatory waves move particles in circular orbits.
    3. Oscillatory waves and translatory waves both move particles in circular orbits.
    4. Oscillatory waves and translatory waves both move particles forward at the same velocity as the wave form.

    Option: A

  19. What are the two major types of sea waves from a geomorphological point of view?

    Options:
    1. High-frequency waves and low-frequency waves
    2. Constructive waves and destructive waves
    3. Plunging waves and spilling waves
    4. Longshore currents and littoral currents

    Option: B

  20. Why are low-frequency waves considered constructive in character?

    Options:
    1. Because they generate a powerful backwash that combs down the beach
    2. Because they plunge and generate a powerful backwash that combs down the beach
    3. Because they lose volume and energy rapidly while moving up the beach
    4. Because they are generated by high-velocity winds striking the coast obliquely

    Option: C