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WorksheetsDay 64-worksheet-Btech-Columns part 2
Total questions: 15
Worksheet time: 12mins
The minimum diameter of longitudinal bars in an RCC column shall not be less than —
(a)
The maximum spacing of longitudinal bars measured along the periphery of a column shall not exceed —
250 mm
200 mm
300 mm
150 mm
For a column using helical reinforcement, the axial load-carrying capacity increases by approximately —
1.10 times
1.50 times
1.05 times
1.25 times
The maximum spacing of transverse reinforcement (lateral ties) in a column is the least of —
16ϕ (largest longitudinal bar), 300 mm, D
16ϕ (smallest longitudinal bar), 300 mm, least lateral dimension
12ϕ, 200 mm, D/2
10ϕ, 150 mm, D
In a circular column, the minimum number of longitudinal bars required as per IS 456 is —
(a)
The characteristic strength of concrete is defined as the strength below which not more than ——-% results fall
(a)
The minimum longitudinal reinforcement in a pedestal shall not be less than what percent of the gross area?
0.10%
0.15%
0.25%
1.50%
The maximum percentage of longitudinal reinforcement allowed in an RCC column is what percent of the gross cross-sectional area?
(a)
For helical columns, the minimum pitch of the helical reinforcement shall not be less than how many times the diameter of the helical bar?
(a)
The maximum pitch of helical reinforcement shall not exceed how many millimetres or one-sixth of the core diameter, whichever is smaller?
50 mm
60 mm
75 mm
90 mm
According to acceptance criteria for concrete, individual cube strength should not vary by more than what percent from the average strength of that set?
(a)
The effective length of a column in a reinforced concrete building frame is independent of the what of the beam?
depth
span
thickness
height
A rectangular column has dimensions 250 mm × 600 mm. The minimum longitudinal reinforcement in a column is 0.8% of gross cross-sectional area. Compute the minimum area of longitudinal steel Asc(min) to be provided.
(a)
A helically reinforced circular column has a core diameter Dc = 300 mm and is provided with 8 mm diameter helical reinforcement. Calculate maximum pitch.
(a)
Three 150 mm cube specimens tested at 28 days gave compressive strengths of 24 MPa, 20 MPa and 28 MPa. According to IS acceptance criteria, check whether this set of results satisfies this criterion.
Yes
No
