creep and shrinkage GATE 2025 MCQ IMPORTANT

 

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THIS BLOG HELPFUL TO GATE 2025 ASPIRANTS FOR CREEP AND SHRINKAGE TOPIC 

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1 The hooked fibers perform better than straight fibers of same length and shape because - 

 Hooked fibers provide more surface area of contact.

 Only straight fibers form weak interface with concrete.

 Lot of energy is consumed in straightening the hooked fibers.

 None of these.

Accepted Answers:

Lot of energy is consumed in straightening the hooked fibers.

1 point

2 Which of these are true –

 The fibers play their role after initiation of first crack.

 Flexural toughness decreases with increase in fiber dosage.

 Steel fibers perform better than glass fibers for a particular volume fraction.

 Heavy weight concrete with steel aggregates have higher post peak deformation capacity.

 E modulus value decreases with increase in high density steel aggregates.

Accepted Answers:

The fibers play their role after initiation of first crack.

Steel fibers perform better than glass fibers for a particular volume fraction.

Heavy weight concrete with steel aggregates have higher post peak deformation capacity.

3   Creep and shrinkage are time-dependent tests. These include the movement of water. In creep strain the water is a)______________ by stress and the water gets b)___________ during shrinkage.

1 point

a)______________

 lost

 moved

Accepted Answers:

moved

1 point

b)___________

 lost

 moved

Accepted Answers:

lost

4   Assertion reasoning

A: Joints with sealing materials are made on pavement slabs to reduce cracking due to drying.

R: The pavements are restrained by soil and tensile stresses are generated.

 Statement A is correct, and R is incorrect.

 Statement A and R are correct, but R is not proper reasoning to A.

 Statement A and R are correct, and R is proper reasoning to A.

 Statement A is incorrect, and R is correct.

Accepted Answers:

Statement A and R are correct, and R is proper reasoning to A.

5  Sustained loading on concrete leads to densification of a) ____________ by b) ______________ process, and the strength c) ______________ because of consolidation. The water in d) ____________ will move to region with low stress.

1 point

a) _________________

 CSH layers

 CAH

 Ca(OH)2

 CASH

Accepted Answers:

CSH layers

1 point

b) _________________

 elastic

 viscoelastic

Accepted Answers:

viscoelastic

1 point

c) _________________

 increases

 decreases

Accepted Answers:

increases

1 point

d) _________________

 micropores

 large capillary pores

Accepted Answers:

micropores

6.

A: The shrinkage strain is higher in stage 1-2 than stage 0-1 because of removal of water from capillary pores in stage 0-1 and gel pores in stage 1-2. 

R: The amount of water removed in stage 1-2 is less than stage 0-1.

S:  The capillary pores are larger in size leading to generation of less strain when dried, whereas the gel pores have adsorbed or interlayer water corresponding to less loss of water and increase shrinkage strain.  

 A and S is correct, R is incorrect.

 A and R are correct, but S is incorrect.

 A, R, and S are correct, and R is proper reasoning of A but not S.

 A, R and S are incorrect.

 A, R, S are correct, and R is proper reasoning of A and S.

 A, R, S are correct, and S is proper reasoning of A and R.

Accepted Answers:

A, R, S are correct, and S is proper reasoning of A and R