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

1. The reinforcement in R.C.C. takes
(a) Tensile stresses (b) Compressive stresses (c) Shear stresses (d) Torsional stresses
Ans--(a)
2. The coefficient of thermal expansion of concrete is nearly equal to
(a) Wood (b) Aluminum (c) Steel (d) Copper
Ans--(c)
3. The minimum compressive strength of 43 grade OPC cement is
(a) 43 N/m2 (b) 43 N/mm2 (c) 43 Kg/m2 (d) 43 N/mm2
Ans--(b)
4. IS 456 recommends-
(a) Working stress method of design (b) Ultimate load method of design
(c) Limit state method of design (d) None of the above
Ans--(c)
5. The yield stress divided by the factor of safety is called as
(a) Ultimate stress (b) Limit stress (c) Elastic stress (d) Permissible stress
Ans- (d)
1. The acceptable limit of safety and serviceability before failure occurs is called as
(a) Limit state (b) Failure state (c) Ultimate state (d) None of the above
Ans--(a)
2. Characteristic strength of steel is
(a) Failure stress (b) Yield stress (c) Ultimate stress (d) None of the above
Ans--(b)
3. The value of partial safety factor for steel is
(a) 1.5 (b) 1.2 (c) 1.15 (D) 1.25
Ans--(c)
4. The value of partial safety factor for concrete is
(a) 1.8 (b) 1.6 (c) 1.15 (d) 1.5
Ans--(d)
5. The value of partial safety factor for DL. + LL is
(a) 1.0 (b) 1.5 (c) 1.2 (d) 1.3
Ans--(b)
1.The Neutral axis of a T-beam exists
(A) Within the flange (B) At the bottom edge of the slab (C) Below the slab (D) All the above
2.The spacing of transverse reinforcement of column is decided by the following consideration.
(A) The least lateral dimension of the column
(B) Sixteen times the diameter of the smallest longitudinal reinforcing rods in the column
(C) Forty-eight times the diameter of transverse reinforcement (D) All the above
3. Side face reinforcement shall be provided in the beam when depth of the web in a beam exceeds
(A) 50 cm (B) 75 cm (C) 100 cm (D) 120 cm
4. The Young's modulus of elasticity of steel, is
(A) 150 KN/ mm2 (B) 200 KN/mm2 (C) 250 KN/ mm2 (D) 275 KN/ mm2
5. By over-reinforcing a beam, the moment of resistance can be increased not more than
(A) 10 % (B) 15 % (C) 20 % (D) 25 %
6. In a singly reinforced beam
(A) Compression is borne entirely by concrete (B) Steel possesses initial stresses when embedded in concrete
(C) Plane sections transverse to the centre line of the beam before bending remain plane after bending
(D) Elastic moduli for concrete and steel have different values within the limits of deformation of the beam
7. The ratio of the breadth to effective depth of a beam is kept
(A) 0.25 (B) 0.50 (C) 0.70 (D) 0.75
8.A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis
(A) Remains within the flange (B) Remains below the slab
(C) Coincides the geometrical centre of the beam (D) None of these
9. If the depth of actual neutral axis of a doubly reinforced beam
(A) Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier
(B) Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier
(C) Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum stresses simultaneously
(D) All the above
10. An under-reinforced section means
(A) Steel is provided at the underside only (B) Steel provided is insufficient
(C) Steel provided on one face only (D) Steel will yield first

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