Engineering Questions with Answers - Multiple Choice Questions
Construction of Under-Reamed Pile Foundation
1 - Question
The equipment required for construction of a under-reamed pile is________
a) Auger boring guide
b) Spiral auger
c) Concreting funnel
d) All of the mentioned
View Answer
Answer: d
Explanation: The equipment required for the construction of pile are i) Auger boring guide ii) spiral auger with extension rods iii) under-reamer with soil bucket and iv) concreting funnel.
2 - Question
The use of bore guide in under-reamed pile foundation is essential for __________
a) To drill the bore hole
b) To provide a support to the pile
c) To keep the bore holes vertical
d) To set the guide assembly in position
View Answer
Answer: c
Explanation: The used of boring guide is essential in order to keep the bore holes vertical and also in its position.
3 - Question
Which of the following stages are involved in the construction of under reamed piles?
a) Concreting of piles and Boring by auger
b) Concreting the funnel
c) None of the mentioned
d) All of the mentioned
View Answer
Answer: a
Explanation: The various stage involved in the construction of under reamed pile foundation are i) boring by auger ii) under-reaming by under-reamer iii) placing reinforcement cage in position iv) concreting of pile caps, plinth beams and curtain walls.
4 - Question
The depth of the bore hole is checked at _________ before insertion of the under-reamer.
a) At the start and At the end
b) Each time
c) None of the mentioned
d) All of the mentioned
View Answer
Answer: a
Explanation: The depth of the bore hole is checked each time before insertion of the under-reamer so that any loose earth spilled from the bucket is removed.
5 - Question
Routine tests are usually carried out on _________
a) Test piles
b) Working piles
c) None of the mentioned
d) All of the mentioned
View Answer
Answer: b
Explanation: Routine test should be carried out on test piles while initial test are preferably carried on test piles.
6 - Question
In the process of pile foundation, boring is done with the help of _________
a) Boring guide
b) Under-reamer
c) Spiral auger
d) Pile beams
View Answer
Answer: c
Explanation: Boring is done with the help of spiral auger, present at the circular collar of the guide assembly.
7 - Question
Enlarging the stem of bore hole at the depth is done by using________
a) Spiral auger
b) Under-reamer
c) Boring guide
d) None of the mentioned
View Answer
Answer: b
Explanation: Under-reaming or enlarging the stem of bore hole at the required depths is achieved by means of the under-reamer consisting of a set of two collapsible blade assembly.
8 - Question
For completion of one under-ream, how many buckets of earth are required for removal?
a) Five
b) Ten
c) Eight
d) Three
View Answer
Answer: c
Explanation: Generally, removal of eight buckets full of earth is required for completion of one under-ream.
9 - Question
Pile groups in under-reamed pile foundation can be tested by means of _________
a) Free standing piles and Pile foundation
b) Cannot be tested
c) None of the mentioned
d) All of the mentioned
View Answer
Answer: a
Explanation: Pile groups may be tested as both free standing piles or piled foundation by applying series of load.
10 - Question
The dimension of the bulb in an under-reamed pile can be checked by __________
a) Meter scale
b) G.I pipe assembly
c) Auger
d) Under-reamer
View Answer
Answer: b
Explanation: The dimensions of the bulb can be checked by means of a graduated G.I. pipe assembly.