One of the criteria for the effecvve width of flange of T-beam is bf =—+ bw +6Df 6 In above formula, l0 signifies_______________?
(A) effective span of T-beam
(B) distance between points of zero moments in the beam
(C) distance between points of maximum moments in the beam
(D) clear span of the T-beam
For walls, columns and vertical faces of all structural members, the form work is generally removed after______________?
(A) 24 to 48 hours
(B) 3 days
(C) 7 days
(D) 14 days
For walls, columns and vertical faces of all structural members, the form work is generally removed after_______________?
(A) 24 to 48 hours
(B) 3 days
(C) 7 days
(D) 14 days
The individual variation between test strength of sample should not be more than______________?
(A) ±5% of average
(B) ± 10% of average
(C) ± 15% of average
(D) ±20% of average
In case of hand mixing of concrete, the extra cement to be added is__________________?
(A) 5%
(B) 10%
(C) 15%
(D) 20%
For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be________________?
(A) 0.75-0.80
(B) 0.80-0.85
(C) 0.85 – 0.92
(D) above 0.92
Which of the following statements is incorrect ?
(A) Minimum cross sectional area of longitudinal reinforcement in a column is 0.8%
(B) Spacing of longitudinal bars measured along the periphery of column should not exceed 300 mm
(C) Reinforcing bars in a column should not be less than 12 mm in diameter
(D) The number of longitudinal bars provided in a circular column should not be less than four
According to IS: 456-1978, the maximum reinforcement in a column is_____________?
(A) 2 %
(B) 4%
(C) 6 %
(D) 8 %
According to IS : 456-1978, the fiexural strength of concrete is________________?
(A) directly proportional to compressive strength
(B) inversely proportional to compressive strength
(C) directly proportional to square root of compressive strength
(D) inversely proportional to square root of compressive strength
Lap length in compression shall not be less than______________?
(A) 15 4>
(B) 20
(C) 24 (j)
(D) 30 (j)