1. The cracks due to incorrect design, faulty construction, or overloading are
a) Structural crack
b) Non-structural crack
c) Thermal expansion
d) None
2. The cracks due to internally induced stresses, thermal movement, and moisture change
are
a) Structural crack
b) Non-structural crack
c) Both a & b
d) None
3. Growing age of the masonry wall is the sign of
a) Thermal movement
b) Bulging
c) Shrinkage
d) None
4. What are the causes of masonry wall cracks?
a) Bulging
b) Shrinkage
c) Growth of vegetation
d) All of the above
5. Select the correct step of repair:
a) Environmental exposure
b) Fixing a suitable framework
c) Application of concrete
d) None
6. Epoxy mortar is used for..... Environment
a) Permeable
b) Solid
c) Impermeable
d) None
7. Epoxy mortar are used for ...mm crack thickness
a) 15mm
b) 20mm
c) 25mm
d) 30 mm
8. Epoxy injection method is for bonding cracked sections of width as minimum...mm to
maximum...mm
a) 0.05 to 0.075mm
b) 0.025 to 0.076mm
c) 0.5 to 0.7mm
d) None
9. In Epoxy injection cracks cut in .... Shape
a) V shape
b) U shape
c) L shape
d) None
10. Grooving and sealing method used for cracks of ...mm to ...mm width
a) 2 to 3mm
b) 3 to 4mm
c) 2 to 4 mm
d) 3 to 5mm
11. The aim of sealant is to create a barrier to ...and to join the cracked surface
a) Air
b) Water
c) Concrete
d) None
12. In the shotcrete process.....Cement is generally used
a) OPC
b) Low heat cement
c) Rapid hardening cement
d) None
13. Stitching does not seal the crack, it just prevents the crack from widening
a. True
b) False
14. From the given method suggest the best method for preparing major cracks and
damaged structure
a) Stitching method
b) Shotcrete
c) Adding reinforcement
d) Done
15. Which section of wall can be strengthened by Dowel Reinforcement?
a) T
b) I
c) Both
d) None
16. Dampness is caused due to
a) Leakage through the defective roof
b) Chemical reaction
c) Lack of curing
d) None
17. Types of grouting...
a) Permeation grouting
b) Displacement grouting
c) Uncontrolled displacement grouting
d) All of these
18. Select the correct step of temporary remedies for internal wall
a) Application of bituminous painting
b) Applying cement wash
c) Coating with boiled oil
d) Both a & b
19. In the stitching method which shape of a metal plate is used
a) V
b) T
c) U
d) L
20. Concrete cracks repair by stitching involves drilling hole on both sides of cracks and
grouting in U shape metal units with short legs
a) True
b) False
21. Extent of thermal movement depends upon
a) Temperature variation of surrounding
b) Coefficient of thermal expansion
c) Dimension of components
d) All of these
22. With respect to concreting more cracks are possible in
a) Summer
b) Winter
c) Monsoon
d) None
23. Shear crack in RCC member occurs due to
a) Thermal expansion
b) Large differential settlement in the foundation
c) Deflection of RCC beam
d) All of these
24. In repairing process involves drilling of holes on opposite the length of the extension
side on the tensile layer of the member
a) True
b) False
25. Spalling is caused due to
a) Dampness
b) Wind
c) Corrosion
d) None
26. as preventive measures for spalling in a masonry wall
a) Masonry sealant is used
b) Lime wash is used
c) Anti-corrosive material is used
d) None
27 Arrange the steps of spalling
1. Remove loose concrete 2. Apply repair material 3. Clean spelled concrete 4. Finishing
a) Step - 3, 1, 2, 4
b) Step - 1, 3, 2, 4
c) Step - 3, 4, 2, 1
28. Link Koba is used to
a) Prevent leakage through RCC slab
b) Provide proper drainage
c) Add structural strength to the slab
d) None
29. The two repairing techniques are common to masonry and RCC work
a) Grooving and stitching
b) Epoxy injection and stitching
c) Grooving and epoxy injection
d) None
30 When the depth of filling is not more than 45cm. Composition of the soil done after
putting a layer of the rubble of thickness
a) 30 to 35 cm
b) 30 to 40 cm
c) 20 to 30 cm
d) 30 to 45cm
31. For the construction of compacted stone column the diameter of holes are
a) 0.60 to 1 m
b) 0.50 to 1 m
c) 1 to 2 m
d) None
32. the most common chemical grout is
a) Silicates
b) Iigsins
c) Resins
d) All of these
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