1. The crack which occurs 45 degrees to the axis of RCC member is...
a) Tensile crack
b) Shear crack
c) Cracks found in a slab
d) None
2. Cracks which runs at 45 degrees at the axis of the beam and are wider at the lower fibre
and disappear in the compressive zones are:
a) Cracks due to the externally applied load
b) Cracks due to poor construction practices
c) Cracks due to excessive shear
d) None
3. The rebaring process involves drilling of holes on opposite the length of the extension
side on the tensile layer of the member
a) True
b) False
4. In the honeycomb method. The first layer must be set before placing the next layer
a) True
b) False
5. In compensating reinforcement the additional bars are placed parallel to old bars at
approximately ...mm from existing bars.
a) 10 mm
b) 12mm
c) 15mm
6. In the honeycomb method, the water-cement ratio is...
a) 0.25
b) 0.30
c) 0.33
d) 0.35
7. Mortar or concrete conveyed through pressure hose and applied pneumatically at high
velocity on to the surface is called...
a) Grunting
b) Grouting
c) Sealing
d) None
8. Repairing methods for RCC structures -
a) Epoxy injection
b) Stitching
c) Rebaring
d) All of them
9. Jacketing means to increase the strength of the existing structure
a) True
b) False
10. Straight cracks in columns, beams, and slabs are found because of rusting of
reinforcement
a) True
b) False
11. Causes of failure of RCC structure
a) Bad structural design
b) Cracks occur at 45 degree
c) The bearing capacity of the soil is considered without any soil
d) All of these
12. Select the probable location of cracks in RCC elements
a) Shear cracks for beam
b) Cracks fund in slab
c) Cracks found in the foundation
d) All of the above
13. What is the diameter of dowel in stitching method?
a) 10mm
b) 20mm
c) 30mm
d) 40mm
14. Cracks found in a slab
a) Near the support
b) At the mid-span
c) At the top of the slab
d) All of these
15. The conventional method in water-proofing are
a) Mud phuska
b) Brick tile topping
c) Both a & b
d) None
16. For water proofing mud phuska is laid for ....mm thickness
a) 200
b) 100
c) 300
d) 250
17. Mud plaster is laid to slope at about .....to .... kg per cubic meter
a) 30 to 35
b) 30 to 40
c) 30 to 45
d) 20 to 30
18. In water proofing method with brick tile topping water cement ratio is
a) 1:2
b) 2:3
c) 1:3
d) 1:1.5
19. In case of heavy rainfall the tiles for water topping provided in..... layer
a) 1
b) 2
c) 3
d) 4
20. In case of low rainfall the tiles for water topping provided in.....layer
a) 1
b) 2
c) 3
d) 4
21. In lime dhar terrace lime concrete is laid in a single layer of about
a) 100mm
b) 200mm
c) 300mm
d) 400mm
22. To avoid surface cracking in lime concrete which of the following material is been
used?
a) Jute fibers
b) Jaggery
c) Fenugreek powder
d) All of these
23. Lime concrete terracing should be repaired after an interval of
a) 4 years
b) 6 years
c) 5 years
d) None
24. Jacketing is applicable to repair
a) Column
b) Pier
c) Slab
d) Both a & b
25. Jacketing is also called as
a) Shotcrete
b) Collaring
c) Guniting
d) Grouting
26. In surface conditioning of concrete
a) Avoid cutting reinforcing steel
b) Avoid feather edges
c) Saw cut 12 mm
d) All of these
27. The cracks appear on the tensile zone of RCC member is called
a) Shear crack
b) Tensile crack
c) Both a&b
d) None
28. Straight crack is developed due to shrinkage
a) True
b) False
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