This set of Railway Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Failure of Railway
1. Which of the following can be a reason for Failure of Natural Ground?
a) Shear Failure
b) Excessive settlement
c) Shear failure or excessive settlement
d) Less settlement
Explanation: Reason for Failure of natural ground can be either Shear failure or excessive settlement. Shear failure usually happens when construction is going on or instantly after construction.
2. How does the provision of sand drains in natural ground affects its load carrying capacity?
a) Helps in quicker consolidation
b) Increases the load
c) Checks shear failure
d) Checks its heaving tendency
Explanation: Providing sand drains help in quicker consolidation of the natural ground thus increasing its load bearing capacity. Provision of suitably spaced sheet or balancing embankment are other methods.
3. Shear failure of embankments is quite common and occurs due to slip.
Explanation: Shear failure of the embankment occurs generally due to slip or weight of embankment or moving load on it. The forces which resist the failure are cohesion and internal friction of fill material.
4. What is a slip passing below the toe of bank through its base known as?
a) Toe failure
b) Base failure
c) Slope failure
d) Embankment failure
Explanation: A slip passing below the toe of bank through its base known as Base failure. A slip passing through toe of bank is called toe failure.
5. What is the purpose of providing an inverted filter blanket?
a) To improve the drainage
b) To improve the bearing capacity of soil
c) To make the track resilient
d) To improve drainage and bearing capacity
Explanation: An inverted filter blanket aids as an obstruction for the upward movement of clay. It also offers a porous medium to drain off the surface water.
6. Which one of the following is wrong regarding the cement grouting of embankments?
a) It prevents water from flowing into the subgrade
b) Cement and sand are used in the ratio of 1:8 to 1:10
c) Its done under a pressure of 60psi
d) The soil is stabilised
Explanation: Cement grouting under a pressure helps stabilising the soil and prevents water from flowing into the subgrade. Cement and sand are used in the ratio of 1:2 to 1:6.
7. Which of the following is not true about Geotextiles?
a) They are made up of Polymers
b) They allow water and soil fines to pass
c) They allow water to pass through
d) It stabilises soil
Explanation: Geotextiles are made up of polymers used to stabilization of soil. They have a property to allow water but not soil fines to pass over.
Sanfoundry Global Education & Learning Series – Railway Engineering.
To practice all areas of Railway Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.