Concrete technology and design of concrete structures Archives

1. The critical section for finding maximum bending moment for footing under masonry wall is located A. At the middle of the wall B. At the edge of the wall C. Halfway between the middle and edge of the wall D. At a distance equal to effective depth of footing from the edge of the wall

At the middle of the wall

At the edge of the wall

Halfway between the middle and edge of the wall

At a distance equal to effective depth of footing from the edge of the wall

Detailed SolutionThe critical section for finding maximum bending moment for footing under masonry wall is located A. At the middle of the wall B. At the edge of the wall C. Halfway between the middle and edge of the wall D. At a distance equal to effective depth of footing from the edge of the wall

2. Workability of concrete is directly proportional to A. Aggregate cement ratio B. Time of transit C. Grading of the aggregate D. All of above

Aggregate cement ratio

Time of transit

Grading of the aggregate

All of above

Detailed SolutionWorkability of concrete is directly proportional to A. Aggregate cement ratio B. Time of transit C. Grading of the aggregate D. All of above

3. The approximate value of the ratio between direct tensile strength and flexural strength is A. 0.33 B. 0.5 C. 0.75 D. 1.0

0.33

0.5

0.75

Detailed SolutionThe approximate value of the ratio between direct tensile strength and flexural strength is A. 0.33 B. 0.5 C. 0.75 D. 1.0

4. The design yield stress of steel according to IS: 456-1978 is (where fy is the characteristic yield strength of steel) A. 0.37 fy B. 0.57 fy C. 0.67 fy D. 0.87 fy

0.37 fy

0.57 fy

0.67 fy

0.87 fy

Detailed SolutionThe design yield stress of steel according to IS: 456-1978 is (where fy is the characteristic yield strength of steel) A. 0.37 fy B. 0.57 fy C. 0.67 fy D. 0.87 fy

5. Which of the following statements is incorrect? A. Higher Vee-Bee time shows lower workability B. Higher slump shows higher workability C. Higher compacting factor shows higher workability D. None of the above

Higher Vee-Bee time shows lower workability

Higher slump shows higher workability

Higher compacting factor shows higher workability

None of the above

Detailed SolutionWhich of the following statements is incorrect? A. Higher Vee-Bee time shows lower workability B. Higher slump shows higher workability C. Higher compacting factor shows higher workability D. None of the above

6. The factor of safety for A. Steel and concrete are same B. Steel is lower than that for concrete C. Steel is higher than that for concrete D. None of the above

Steel and concrete are same

Steel is lower than that for concrete

Steel is higher than that for concrete

None of the above

Detailed SolutionThe factor of safety for A. Steel and concrete are same B. Steel is lower than that for concrete C. Steel is higher than that for concrete D. None of the above

7. 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

Directly proportional to compressive strength

Inversely proportional to compressive strength

Directly proportional to square root of compressive strength

Inversely proportional to square root of compressive strength

Detailed SolutionAccording 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

8. Diagonal tension in a beam A. Is maximum at neutral axis B. Decreases below the neutral axis and increases above the neutral axis C. Increases below the neutral axis and decreases above the neutral axis D. Remains same

Is maximum at neutral axis

Decreases below the neutral axis and increases above the neutral axis

Increases below the neutral axis and decreases above the neutral axis

Remains same

Detailed SolutionDiagonal tension in a beam A. Is maximum at neutral axis B. Decreases below the neutral axis and increases above the neutral axis C. Increases below the neutral axis and decreases above the neutral axis D. Remains same

9. Assertion A: The load factor for live load is greater than that for dead load. Reason R: The live loads are more uncertain than dead loads. Select your answer based on the coding system given below: A. Both A and R are true and R is the correct explanation of A B. Both A and R are true but R is not the correct explanation of A C. A is true but R is false D. A is false but R is true

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is not the correct explanation of A

A is true but R is false

A is false but R is true

Detailed SolutionAssertion A: The load factor for live load is greater than that for dead load. Reason R: The live loads are more uncertain than dead loads. Select your answer based on the coding system given below: A. Both A and R are true and R is the correct explanation of A B. Both A and R are true but R is not the correct explanation of A C. A is true but R is false D. A is false but R is true

10. In counterfort retaining walls, the main reinforcement in the stem at support is A. Not provided B. Provided only on inner face C. Provided only on front face D. Provided both on inner and front faces

Not provided

Provided only on inner face

Provided only on front face

Provided both on inner and front faces

Detailed SolutionIn counterfort retaining walls, the main reinforcement in the stem at support is A. Not provided B. Provided only on inner face C. Provided only on front face D. Provided both on inner and front faces