RCC Objective || RRB JE || SSC JE || Semester Exam ||

1.In a singly reinforced beam, if the permissible stress in concrete reaches earlier than that in steel, the beam section is called
(A) Under-reinforced section (B) Over reinforced section
(C) Economic section (D) Critical section
2. The minimum number of main steel bars provided in R.C.C.
(A) Rectangular columns is 4 (B) Circular columns is 6
(C) Octagonal columns is 8 (D) All the above
3. In a singly reinforced beam, the effective depth is measured from its compression edge to
(A) Tensile edge (B) Tensile reinforcement
(C) Neutral axis of the beam (D) Longitudinal central axis
4. Which one of the following set of value give the minimum clear cover in mm for the main reinforcement in the slab, beam, column, and footing respectively according to IS-456-1978?
(a) 20, 25, 30, 75 (b) 5, 15, 25, 50 (c) 15, 25, 40, 75 (d) None of these
5. Modulus of Elasticity of M-25concrete as per IS-456-2000 is.
(a) 25000 Mpa (b) 50047 Mpa (c) 21023 Mpa (d) 30000 Mpa
6. The total Tensile force at the time of failure of a concrete beam section of width b is..
(a) 0.87 fy Ast (b) 0.54 fck b xu (c) 0.66 fy Ast (d) 0.80 fck b xu
7. As per the provisions of IS-456-2000 in the limit state method for design of beam the limiting value of the depth of neutral axis in a reinforced concrete beam of effective depth d is given as
(a) 0.53d (b) 0.48d (c) 0.46d (d) any of the above depends on grade of steel
8. Target mean strength for M-25 Concrete is-
(a) 21.5 (b) 31.60 (c) 20.00 (d) 0.87
9. Shear Reinforcement in beam is not provided in the form of----
(a) Hanger bars (b) Inclined Stirrups (c) vertical stirrups (d) Bent up bars
10. The flexural strength of M-40concrete as per IS-456-2000 is.
(a) 3.50 Mpa (b) 5.47 Mpa (c) 4.427 Mpa (d) 30 Mpa
1. Shear reinforcement is provided in the form of
(a)Vertical stirrups (b) Inclined stirrups (c) Bent up bars (d)All of the above
2. The spacing of stirrups, neat the supports, is
(a) Between minimum and maximum (b) Zero (c) Minimum (d) Maximum
3. The minimum length of bar which must be embedded in concrete to develop full stress is called
(a) Anchorage length (b) Flexural length (c) Development length (d) Bond length
4. Bond can be increased by
a) Using rich mix of concrete (b) Using deformed bars (c) Proper curing (d)All of the above
5. Shear taken by bent up bars is limited to--
(a) Vs (b) Vs /3 (c) Vs /2 (d)2 Vs
6. Shear reinforcement is provided to resist
(a) Diagonal compression (b) Diagonal bending (c) Diagonal tension (d) None of the above
7. For deformed bars, bond stress is
(a) More than plane bars (b) Less than plane bars (c) Equal to plane bars (d) No comparison
1. Is a slab floor system, the and beams are called as
(a) T-beams (b) L-beams (c) H-beams (d) None
2. Intermediate beams in a slab floor system casts monolithically are called
(a) T-beams (b) L-beams (c) H-beams (d) None
3. The portion of slab which acts with the beam is called as
(a) Web (b) T-beam (c) Rib (d) Flange
4. For simply supported T-beam lo is equal to--
(a) 2l (b) l (c) 3l (d) 4l
5. For a continuous T-beam, the ratio of effective span to effective depth of the beam should be less tha
10 (b) 30 (c).20 (d) 26
1. Minimum grade of concrete for post-tensioned works is
(a) M40 (b) M20 (c) M30 (d) M50
2. Pre-tensioning is used for
(a) Poles (b) Dams (c) Bridges (d) None of the above
3. In pre-stressed concrete, the materials used are:
High strength steel and high strength concrete (b) High strength steel and low strength concrete
(c) Low strength steel and high strength concrete (d) Low strength steel and low strength concrete
4. Pre-stressing can eliminate
(a) Compressive stress (b) Tensile stress (c) Bearing stress (d) Shear stress
5. The whole concrete area is effective in
(a) Reinforced cement concrete (b) Plain cement concrete (c) Pre-stressed concrete (d) Ready mix concrete
6. Pre-stressed concrete members are
Heavier than R.C.C. (b) Thicker than R.C.C.. (c) Thinner than R.C.C. (d) Same as R.C.C.
7. A strand is made of
(a) 6 wires (b) 10 wires (c) 8 wires (d) 5 wires

[@nkbabu4470]

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Short notes ka notes hai sir

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Hmm