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Which of the following statements is/are true about the advantages of prestressed concrete structure? A. In the prestressed concrete structure, the deflection of beams is considerably reduced. B. Prestressing decreases cracks in concrete under all stages of loading. C. Prestressed concrete requires only 1/3 rd of the concrete required for R.C.C.
The influence of shape of aggregate in strength and workability of concrete are given below in statements S1, S2, S3 and S4. Which of the statements are correct? S1: Rounded aggregate produces concrete with high workability and low strength. S2: Angular aggregate produces concrete with high workability and low strength. S3: Rounded aggregate produces concrete with low workability and high strength. S4: Angular aggregate produces concrete with low workability and high strength.
Consider the following statements : Moment Area Method proves advantageous in analyzing 1. cantilever beams. 2. symmetrically loaded simply supported beams. 3. fixed beams. 4. continuous beams. Which of the above statements are correct?
With regard to the characteristic strength of concrete, consider the following statement: “Test strength of samples means the average strength of X samples. The strength of a sample should not vary by more than ± Y% of the average strength. What will be the values of X and Y here?
Calculate ultimate moment and shear of effective span is 30m, live load is 9kn/m, dead load excluding self weight is 2kn/m, load factors for dead load is 1.4 for live load is 1.6 cube strength of concrete fcu is 50n/mm2 cube strength at transfer is fci is 35n/mm2, tensile strength of concrete Ec is 34kn/mm2 loss ratio ɳ is 0.85 and 8mm diameter high tensile strength fpu is 1500n/mm2 are available for use and the modulus of elasticity of high tensile wires is 200kn/mm2?
Find ultimate shear strength (check it for safe against shear failure) if vu is 27.75kn, Loss ratio is 0.8, prestressing force is 182000, area is 31400, breadth is 50 where height is 320, prestressing force is 1.7, fcp = 4.65, ft is 1.7?
Check for deflection due to prestressing force if given data is Prestressing force is 182×103 eccentricity of cable is 105, Length of the cable is 1000, elastic modulus of concrete is 34×103, Moment of inertia is 3200×105?
Which of the following statements describe(s) limitation(s) of concrete technology? A. Availability of concrete ingredients easily. B. Due to low tensile strength, concrete is required to be reinforced to avoid cracks. C. Monolithic character gives better appearance D. The property of concrete possesses high compressive strength.
In the following question the 1st and the last part of the sentence/passage are numbered 1 and 6. The rest of the sentence/ passage is split into four parts and named P, Q, R and S. These four parts are not given in their proper order. Read the sentence/passage and find out which of the four combinations is correct. 1. Security inks misuse a similar rule that causes the clear and always showing signs of changing shades of a film of oil on water. P. At the point when two beams of light meet each other in the wake of being reflected from these distinctive surfaces, they have each travelled somewhat extraordinary distances. Q. The key is that the light is bouncing off two surfaces, that of the oil and that of the water layer beneath it. R. The separation the two beams travel figures out which wavelengths, and thus, meddle productively and look brilliant. S. Since light is an electromagnetic wave, the pinnacles and troughs of each beam at that point meddle either usefully, to seem brilliant, or dangerously, to seem diminish. 6. Since the separation the beams travel changes with the point as you take a look at the surface, diverse hues look splendid from changed review edges.
Consider the following statements: 1. If more water is added to concrete for increasing its workability, it results into concrete of low strength. 2. No slump is an indication of a good workable concrete. 3. Higher the slump of concrete, lower will be its workability. 4. Workability of concrete is affected by water content as well as water-cement ratio. Which of the above statements are correct?