GATE 2025 important question related to concrete technology ( properties of hardened concrete , material testing's , stress -strain etc. )

 Dear students here you find important question related to concrete technology (  properties of hardened concrete , material testing's , stress -strain etc. )

Hopes it will be helpful to students in forthcoming GATE 2025 Exam.

1.

When compression test is carried out on a concrete cylinder of L/D = 2, the mid height of the cylinder is in a state of A. Because of this state of stress, the cracks formed at the centre are B. Find A and B from the options below.

 A: Pure shear B: Diagonal

 A: Pure tension B: Vertical

 A: Pure compression B: Vertical

 A: Combination of compression and tension B: Horizontal

Accepted Answers:

A: Pure compression B: Vertical

2.  

Stress Vs Deflection diagram of concrete = Stress Vs deflection diagram of steel - Stress Vs deflection diagram of the steel and concrete composite

 True

 False

Accepted Answers:

False

3.

Refer the following figure and choose the option which best represents the materials with 

corresponding stress-strain behavior

 A: Chalk B: Concrete C: Steel

 A: Steel B: Concrete C: Glass

 A: Chalk B: Steel C: Concrete

 A: Concrete B: Glass C: Chalk

Accepted Answers:

A: Chalk B: Steel C: Concrete

4.  Match the following 

 1 – i, 2 – ii, 3 – iii, 4 -iv

 1 – iii, 2 – ii, 3 – i, 4- iv

 1 – ii, 2 – iv, 3 – i , 4 - ii

 1 – i, 2 – iii, 3 – iv, 4-ii

Accepted Answers:

1 – i, 2 – iii, 3 – iv, 4-ii

5. 

Find the incorrect statements among the ones below, regarding growth of cracks on testing

 low to moderate strength concrete:

 ITZ cracks first because the aggregates attract more load initially

 ITZ starts cracking after 50% of load is reached

 Paste will start cracking when the cracks spread from ITZ

 Post-peak behavior of extended deformation results from the failure of aggregates inside the concrete.

Accepted Answers:

ITZ starts cracking after 50% of load is reached

Post-peak behaviour of extended deformation results from the failure of aggregates inside the concrete

6.   

.The linearity in the stress-strain curve of concrete is generally assumed to be up to 40% of 

 the ultimate load. The modulus determined using this concept is known as ______modulus

Accepted Answers:

 secant

1 point

7   The_________ modulus can be used as indicator of extend of damage

     in the concrete system

Accepted Answers:

 tangent