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Geotechnical Engineering
Geotechnical Engineering
Shapes of Wells and Component Parts
Question 1
Marks :
+2
|
-2
Pass Ratio :
100%
The common types of well shape are _________
Rectangular
Dumb bell
Single circular
All of the mentioned
Explanation:
The common types of well shapes are: i) single circular ii) Twin circular iii) Dumb-well iv) Double-D v) Twin-hexagonal vi) Twin-octagonal vii) Rectangular.
Question 2
Marks :
+2
|
-2
Pass Ratio :
100%
Which of the following caissons, permits excavation in dry?
Pneumatic caissons
Box caissons
Open caissons
All of the mentioned
Explanation:
A pneumatic caisson has its lower end designed as a working chamber in which compressed air is forced to prevent the entry of water and thus permit excavation in dry.
Question 3
Marks :
+2
|
-2
Pass Ratio :
100%
The components that are needed to be considered in designing of a well foundation is _______
Shape of the well
Sand filing
Bottom plug
Dredge hole
Explanation:
The following components of a well have to be considered in the design of a well foundation: well curb cutting edge, steining, Bottom plug and well cap.
Question 4
Marks :
+2
|
-2
Pass Ratio :
100%
What are the types of caissons that can be used as a foundation?
Box caissons and Open caissons
Closed caissons
None of the mentioned
All of the mentioned
Explanation:
The caissons are of three types: i) Box caissons ii) open caissons iii) pneumatic caissons.
Question 5
Marks :
+2
|
-2
Pass Ratio :
100%
___________ forms the most common type of deep foundation for bridges.
Pile foundation
Well foundation
Shallow foundation
Pier foundation
Explanation:
In India, well foundation forms the most common type of deep foundation for bridges.
Question 6
Marks :
+2
|
-2
Pass Ratio :
100%
The sinking of the dredge is uniform in which of the following, shapes of well?
Double-D
Rectangular
Circular
Dumb-well
Explanation:
As the perimeter of the circle is equidistant at all points from the center of the dredge hole, the sinking is more uniform than other shapes.
Question 7
Marks :
+2
|
-2
Pass Ratio :
100%
The choice of a particular shape for a well depends on ________
Dimension of the base and Cost of sinking
Type of soil condition
None of the mentioned
All of the mentioned
Explanation:
The choice of a particular shape of well depends upon the dimension of the pier or abutment, the care and cost of sinking, the considerations of the tilt and shift during the sinking.
Question 8
Marks :
+2
|
-2
Pass Ratio :
100%
The most economical shape, of a well for the construction of large pier is _________
Twin circular
Double-D
Rectangular
Single circular
Explanation:
The dredge area for a double-D shape is smaller when compared to others; hence it can be more economical than a singular circular well.
Question 9
Marks :
+2
|
-2
Pass Ratio :
100%
A disadvantage in using circular shape of well foundation is ___________
Minimum perimeter
Skin friction is maximum
Diameter of well is more than required
Sinking is more uniform
Explanation:
The disadvantage of a circular well is that in the direction parallel to the span of the bridge, the diameter of the well is much more than the minimum size required.
Question 10
Marks :
+2
|
-2
Pass Ratio :
100%
Well are also called as __________
Open caissons
Shell sunk
Caisse
All of the mentioned
Explanation:
Open caissons (“caisson†a French word) are called as wells.
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