1.The under-reamed piles are connected by a beam known as ___________
a) Capping beam and Grade beam
b) Reamed beam
c) None of the mentioned
d) All of the mentioned
Explanation: The under-reamed piles are connected by a reinforced concrete beam, known as capping beam or grade beam.
2. The maximum spacing of the under-reamed pile should not normally exceed __________
a) 2 meters
b) 2½ meters
c) 1.5 meters
d) 30 centimeters
Explanation: The maximum spacing of the under-reamed pile should not normally exceed 2½ m as to avoid heavy capping beams.
3. Under reamed piles are normally bored _________ piles.
a) Cast-in-situ piles
b) Pre-cast-piles
c) Steel piles
d) Composite piles
Explanation: Under reamed piles are bored cast-in-situ concrete piles having one or more bulbs formed by enlarging the bore hole.
4. The spacing of the piles in under-reamed pile foundation depends on which of the following factor?
a) Nature of the ground and Type of pile
b) Load acting on the pile
c) None of the mentioned
d) All of the mentioned
Explanation: The spacing of the piles shall be considered in relation to the nature of the ground, the types of pile and the manner in which the pile transfers the load to the ground.
5. The grade beams are designed for a maximum bending moment of _________ if the beams are supported.
a) (wL2)/50
b) (wL2)/30
c) (wL2)
d) None of the mentioned
Explanation: The grade design are designed for a maximum bending moment of (wL2)/50 if the beam are supported during the construction, and for a bending moment of (wL2)/30 if the beams are not supported
6. The details of the depth of beam and reinforcement required for various loading is provided by_______
a) Indian standard code
b) Central Building Research Institute, Roorkee
c) M.I.T system
d) None of the mentioned
Explanation: Design of grade beam, depth of beam and reinforcement required for various loading is provided by Central Building Research Institute, Roorkee.
7. Cased cast-in-situ piles are suitable for _________ conditions.
a) Seasonal moisture change
b) Dry condition
c) All ground conditions
d) All of the mentioned
Explanation: Cased cast-in-situ piles are suitable in practically all ground conditions.
8. Bored compaction piles are the modification of __________
a) Composite piles
b) End bearing piles
c) Compaction piles
d) Under-reamed piles
Explanation: Bored compaction piles are the modification of under-reamed piles. These piles are also cast-in-situ piles, same as under-reamed piles
9.The types of Raymond concrete piles in use are __________
a) Raymond standard concrete pile and Raymond step-taper pile
b) Raymond cased pile
c) None of the mentioned
d) All of the mentioned
Explanation: At present, two types of Raymond piles are in use i) Raymond standard concrete pile and ii) Raymond step-taper concrete pile.
10. The Raymond standard pile is used primarily as a________
a) Compaction pile
b) Tension pile
c) Friction pile
d) End bearing pile
Explanation: The Raymond standard pile is used primarily as a friction pile since its uniform heavy taper of 1 in 30 usually results in shorter piles