This set of Repair and Rehabilitation of Structures Multiple Choice Questions & Answers (MCQs) focuses on “Provision of Movement Joint in Structures – Set 2”.
1. The main cause of cracking of cracks in the terrace is due to thermal and moisture movements.
a) True
b) False
View Answer
Explanation: As, terrace of the building is very much exposed to weather, cracks occur along the parapet junction and also at intermediate sections in long stretches due to thermal and moisture movements.
2. Which of the following joint consists of pre-plan break in the continuity of structure or a component?
a) Diagonal joint
b) Vertical joint
c) Horizontal joint
d) Expansion joint
View Answer
Explanation: Expansion joint consists of a pre-plan break in the continuity structure with a gap of about 6mm to 40 mm wide and this gap is filled with any kind of flexible material which undergoes compression under expansive force and stretched under pulling force.
3. Which of the following joint consists of straight butt joint without any bond at the interface?
a) Diagonal joint
b) Vertical joint
c) Control joint
d) Expansion joint
View Answer
Explanation: Control joint consists of straight butt that has no bond at the interface that are formed by laying the concrete in alternate panels or it can also be done by providing a strip of some material that don’t bond with the concrete.
4. __________ joint is another form of control joint which is provided in the weaker section of the member.
a) Diagonal joint
b) Vertical joint
c) Dummy joint
d) Expansion joint
View Answer
Explanation: Dummy joint is another form of control joint which are provided in the weaker section of the member by leaving a groove at the time of concrete or mechanically forming a groove after laying the concrete.
5. Which of the following joint is provided to allow the sliding movement of one component over the other?
a) Sliding joint
b) Vertical joint
c) Dummy joint
d) Expansion joint
View Answer
Explanation: To provide the sliding movement of one component over the, a sliding joint is provided in a plane at right angles to another plane and is formed applying a layer of plaster on any one of the surfaces and giving it a smooth finish before casting the other component.
6. Load bearing structure with flat roof having cross roof at intervals, the expansion joint is provided at _________ distance apart.
a) 30 to 35m
b) 25 to 40m
c) 45 to50m
d) 40 to 45m
View Answer
Explanation: When expansion joint of 20 to 40 mm wide is provided at a distance of 25 to 40m apart for load bearing structures having flat roof with cross walls at intervals the movement caused due to the contraction and expansion which leads to the formation of cracks can be avoided.
7. In RCC framed structure the panel walls of the cladding are provided with a __________ expansion joint of 25 to 40mm width.
a) diagonal joint
b) vertical joint
c) horizontal joint
d) expansion joint
View Answer
Explanation: The panel walls of the cladding of RCC framed structures are provided with the horizontal expansion joint of 25 to 40 mm wide by introducing twin columns or beams that have combined footing.
8. Junction between old and new structures is provided by the vertical slip joint.
a) True
b) False
View Answer
Explanation: When vertical slip joints are provided between the old and new junction, the seepage of rain water from top to sides can be prevented.
9. In concrete pavements the control joint provided in the transverse direction at a spacing of ___________
a) 5 to 10m
b) 3 to 5m
c) 2 to 3m
d) 3 to 4m
View Answer
Explanation: Control joints are provided in transverse direction in concrete pavements at spacing of 3 to 5m which controls the movement of the components of the structure and sometimes it also acts as a construction joint as well.
10. Movement joints are provided in structures to compensate for the high stresses that are created in any part of the structure.
a) True
b) False
View Answer
Explanation: When movement joints are provided in the structure, they compensate for the expansion and contraction that are caused due to the loads that are acting in the component.
Sanfoundry Global Education & Learning Series – Repair and Rehabilitation of Structures.
To practice all areas of Repair and Rehabilitation of Structures, here is complete set of Multiple Choice Questions and Answers.
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