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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 related to non-destructive testing of concrete: 1. Indentation test is used to assess the quality of concrete. 2. Resonant Frequency method is based on a laboratory test. 3. Compressive strength of concrete is estimated through Pulse Velocity Measurement 4. Dynamic Modulus of Elasticity is determined by a Sonometer Test. 5. Thickness of concrete can be estimated by in-situ Rebound Hammer Test. 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?
Permeability in concrete is studied towards providing for, or guarding against, which of the following features? 1. The penetration by materials in solution may adversely affect the durability of concrete; moreover, aggressive liquids 'attack' the concrete. 2. In the case of reinforced concrete, ingress of moisture and air will result in corrosion of steel leading to an increase in the volume of steel, resulting in cracking and swilling of the concrete cover. 3. The moisture penetration depends on permeability and if the concrete can become saturated with water it is less vulnerable to frost action.
In a survey of 100 students, it was found that 25 students have enrolled for Navy AA test series, 26 students have enrolled for NDA test series, 26 students have enrolled for Airforce group X test series, 9 students have enrolled for both Navy AA and Airforce group X test series, 11 students have enrolled for both Navy AA and NDA test series, 8 students have enrolled for both NDA and Airforce group X test series whereas 3 students have enrolled in all three test series. Find the number of students who has not enrolled in any of the test series.
In a survey of 100 students, it was found that 25 students have enrolled for Navy AA test series, 26 students have enrolled for NDA test series, 26 students have enrolled for Airforce group X test series, 9 students have enrolled for both Navy AA and Airforce group X test series, 11 students have enrolled for both Navy AA and NDA test series, 8 students have enrolled for both NDA and Airforce group X test series whereas 3 students have enrolled in all three test series. Find the number of students who have enrolled exactly in any two test series.
In a survey of 100 students, it was found that 25 students have enrolled for Navy AA test series, 26 students have enrolled for NDA test series, 26 students have enrolled for Airforce group X test series, 9 students have enrolled for both Navy AA and Airforce group X test series, 11 students have enrolled for both Navy AA and NDA test series, 8 students have enrolled for both NDA and Airforce group X test series whereas 3 students have enrolled in all three test series. Find the number of students who have enrolled in exactly one test series.
Seven persons A, Q, E, F, L, M and C live on 7 floor building numbered as 1 to 7th floor from bottom to top. Bottom floor numbered as floor 1 and its above floor numbered as floor 2 and so on. Topmost floor numbered as floor 7. A lives on the 4th floor. Two persons live between A and F. M lives just above E. F does not live on the top floor. Q lives on the 2nd floor. L is not an immediate neighbour of Q and does not live on the top floor. Who lives on the top floor?
In the following question below some statements are given followed by some conclusions. Taking the given statements to be true even if they seem to be at variance from commonly known facts, read all the conclusions and then decide which of the given conclusions logically follows the given statements. Statements: Each bottom is top. All top are high. No high is low. Conclusions: I. No bottom is low. II. Some high are bottom. III. Some top are low. 
Five persons A, L, K, D and S lives on five floor building. Each person lives on each floor. Bottom floor numbered as floor 1 and above floor is numbered as floor 2 and so on top floor numbered as floor 5. A lives between K and L. Neither K nor L lives on either top nor bottom floor. L lives below K. D does not lives on top floor. Who lives on top floor?