Engineering Questions with Answers - Multiple Choice Questions
Shapes of Wells and Component Parts
1 - Question
The common types of well shape are _________
a) Rectangular
b) Dumb bell
c) Single circular
d) All of the mentioned
View Answer
Answer: d
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.
2 - Question
Well are also called as __________
a) Open caissons
b) Shell sunk
c) Caisse
d) All of the mentioned
View Answer
Answer: a
Explanation: Open caissons (“caisson” a French word) are called as wells.
3 - Question
. ___________ forms the most common type of deep foundation for bridges.
a) Pile foundation
b) Well foundation
c) Shallow foundation
d) Pier foundation
View Answer
Answer: b
Explanation: In India, well foundation forms the most common type of deep foundation for bridges.
4 - Question
. The choice of a particular shape for a well depends on ________
a) Dimension of the base and Cost of sinking
b) Type of soil condition
c) None of the mentioned
d) All of the mentioned
View Answer
Answer: a
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.
5 - Question
What are the types of caissons that can be used as a foundation?
a) Box caissons and Open caissons
b) Closed caissons
c) None of the mentioned
d) All of the mentioned
View Answer
Answer: a
Explanation: The caissons are of three types: i) Box caissons ii) open caissons iii) pneumatic caissons.
6 - Question
Which of the following caissons, permits excavation in dry?
a) Pneumatic caissons
b) Box caissons
c) Open caissons
d) All of the mentioned
View Answer
Answer: a
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.
7 - Question
The sinking of the dredge is uniform in which of the following, shapes of well?
a) Double-D
b) Rectangular
c) Circular
d) Dumb-well
View Answer
Answer: c
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.
8 - Question
The components that are needed to be considered in designing of a well foundation is _______
a) Shape of the well
b) Sand filing
c) Bottom plug
d) Dredge hole
View Answer
Answer: c
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.
9 - Question
A disadvantage in using circular shape of well foundation is ___________
a) Minimum perimeter
b) Skin friction is maximum
c) Diameter of well is more than required
d) Sinking is more uniform
View Answer
Answer: c
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.
10 - Question
The most economical shape, of a well for the construction of large pier is _________
a) Twin circular
b) Double-D
c) Rectangular
d) Single circular
View Answer
Answer: b
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.