Tue. Jun 25th, 2024

River Valleys and Graded River

  1. What type of valleys are developed along the synclinal axis?

    Options:
    1. Anticline valleys
    2. Rift valleys
    3. Fault-line valleys
    4. Syncline valleys

    Option: D

  2. What are the valleys of small streams that develop along joints of rocks called?

    Options:
    1. Antecedent valleys
    2. Superimposed valleys
    3. Joint valleys
    4. Uniclinal valleys

    Option: C

  3. Which valley type is developed due to the fall in sea level and consequent accelerated rate of valley deepening?

    Options:
    1. Drowned valleys
    2. Rejuvenated valleys
    3. Antecedent valleys
    4. Rift valleys

    Option: B

  4. What does the longitudinal profile of a river represent?

    Options:
    1. The channel gradient of the river from its source to the mouth
    2. The channel width of the river from its source to the mouth
    3. The channel depth of the river from its source to the mouth
    4. The flow velocity of the river from its source to the mouth

    Option: A

  5. What is the maximum limit of vertical erosion determined by?

    Options:
    1. The channel gradient of the river from its source to the mouth
    2. The sea level
    3. The flow velocity of the river from its source to the mouth
    4. The channel width of the river from its source to the mouth

    Option: B

  6. What does the term ‘grade’ mean in fluvial system?

    Options:
    1. Slope of a stream floor
    2. Continuous curve of descent of a stream floor
    3. River flow downstream
    4. Load transported downstream

    Option: B

  7. What is a graded river?

    Options:
    1. A river with a flat floor
    2. A river with a curved floor
    3. A river that can transport all the loads downstream
    4. A river that flows uphill

    Option: C

  8. Who is believed to have first used the word ‘grade’ in 1876?

    Options:
    1. W.J. McGee
    2. W.M. Davis
    3. H. Gannett
    4. G.K. Gilbert

    Option: D

  9. Who is mainly responsible for elaborating the concept of grade?

    Options:
    1. W. Johnson
    2. H. Gannett
    3. G.H. Dury
    4. W.M. Davis

    Option: D

  10. What is a graded curve?

    Options:
    1. A flat curve
    2. A curved floor of a river
    3. A continuous curve of descent of a stream floor
    4. A steep curve

    Option: C

  11. What is the balanced condition of a mature or old river according to Davis?

    Options:
    1. The balance between erosion and deposition brought about by changes in the capacity and quantity of work
    2. The balance between the quantity of work and discharge of the river
    3. The balance between the velocity and discharge of the river
    4. The balance between the slope and volume of water of the river

    Option: A

  12. According to Dury, what is the slope of the graded river?

    Options:
    1. The slope of equilibrium
    2. The slope of maximum erosion
    3. The slope of maximum deposition
    4. The slope of maximum velocity

    Option: A

  13. According to Mackin, what is a graded stream?

    Options:
    1. A stream with a high velocity and low sediment load
    2. A stream with a low velocity and high sediment load
    3. A stream in which the slope is delicately adjusted to provide the required velocity for transporting the load supplied from the drainage basin
    4. A stream in which the velocity is independent of the slope

    Option: C

  14. What are the independent variables that control the hydraulic geometry of a stream?

    Options:
    1. Channel width, channel depth, and bed roughness
    2. Stream discharge, sediment load, and ultimate base level of erosion
    3. Velocity, quantity, and nature of sediments
    4. Channel behaviour, tendency of meandering or braiding, and lithology

    Option: B

  15. What are the semi-dependent variables that control the hydraulic geometry of a stream?

    Options:
    1. Independent variables
    2. Channel width, channel depth, and bed roughness
    3. Velocity, quantity, and nature of sediments
    4. Channel behaviour, tendency of meandering or braiding, and lithology

    Option: B

  16. What determines the velocity of the flow in a river channel?

    Options:
    1. Channel gradient and the size of the river channel
    2. Discharge and velocity
    3. Velocity of moving water and size of the river channel
    4. Velocity of moving water and discharge

    Option: C

  17. What is the relation between meandering and channel slope?

    Options:
    1. Meandering increases channel length, which increases channel slope
    2. Meandering decreases channel length, which decreases channel slope
    3. Meandering increases channel length, which decreases channel slope
    4. Meandering decreases channel length, which increases channel slope

    Option: C

  18. What is a graded river?

    Options:
    1. A river that has a fixed slope throughout its course
    2. A river that has attained perfect balance between transporting capacity and total load to be transported
    3. A river that has a high velocity and a high transporting capacity
    4. A river that has a low velocity and a low transporting capacity

    Option: B

  19. What is the stage of degradation?

    Options:
    1. When sediment load increases and exceeds the transporting capacity of the river
    2. When sediment load decreases and erosion exceeds deposition
    3. When sediment load decreases and deposition exceeds erosion
    4. When sediment load increases and deposition exceeds erosion

    Option: B

  20. What is the graded profile of a river?

    Options:
    1. A longitudinal profile indicating balance between erosion and deposition throughout the course of the river
    2. A profile indicating the maximum slope of a river channel
    3. A profile indicating the minimum slope of a river channel
    4. A profile indicating the sediment load of a river

    Option: A