# Concrete Technology Questions and Answers – Creep

This set of Concrete Technology Multiple Choice Questions & Answers (MCQs) focuses on “Creep”.

1. Creep is ____________
a) Time dependent
b) Time independent
c) Pressure dependent
d) Temperature dependent

Explanation: It is the time-dependent deformation that occurs on the prolonged application of stress.

2. If the creep effect is considered at a given load, the modulus determined is referred to as ______
a) Short term modulus of elasticity
b) Elasticity
c) Long term modulus of elasticity
d) Creep effect

Explanation: If creep effect is considered at a given load, the modulus determined is referred to as long term modulus of elasticity.

3. If θ is creep coefficient then what is Elong?
a) Eshort /(1+θ)
b) Eshort *(1+θ)
c) Eavg /(1+θ)
d) Eavg *(1+θ)

Explanation: Eshort /(1+θ), Where θ is creep coefficient and Creep coefficient is the ratio of creep strain to elastic strain.

4. Concrete exhibits initial elastic strain which depends on __________
a) Magnitude of applied stress
b) Rate of applied stress
c) Magnitude and rate of applied stress
d) Elastic modulus

Explanation: Concrete exhibits initial elastic strain which depends on the magnitude and rate of applied stress.

5. This strain increases over time due to _________
a) Creep
b) Elastic modulus
c) Short term modulus of elasticity
d) Long term modulus of elasticity

Explanation: This strain increases over time due to creep where the concrete will experience inelastic deformation.

6. If the stress is removed, the specimen shows an instantaneous recovery strain ___ the elastic strain on loading.
a) Higher than
b) Lower than
c) Equal to
d) Much greater than

Explanation: If the stress is removed, the specimen shows an instantaneous recovery strain lower than the elastic strain on loading, followed by gradual decrease in strain (creep recovery) over time.

7. According to Lamond and Pielert, it’s the ____ that exhibits creep upon application of load on a concrete specimen.
a) Aggregates
b) Water
c) Cement paste

Explanation: According to Lamond and Pielert, it’s the cement paste that exhibits creep upon application of load on a concrete specimen.

a) Differential elastic strain
b) Instantaneous elastic strain
c) Differential inelastic strain
d) Instantaneous inelastic strain

Explanation: When concrete is loaded it experiences a large strain upon loading known as the instantaneous elastic strain.

9. Aggregate has therefore a direct effect on the long-term deformations of concrete because __________
a) Low elastic modulus aggregate will produce a stiffer concrete that will have relatively higher resistance to deformation
b) High elastic modulus aggregate will produce a stiffer concrete that will have relatively higher resistance to deformation
c) High elastic modulus aggregate will produce a stiffer concrete that will have relatively lower resistance to deformation
d) Low elastic modulus aggregate will produce a stiffer concrete that will have relatively lower resistance to deformation

Explanation: Aggregate has therefore a direct effect on the long-term deformations of concrete because a high elastic modulus aggregate will produce a stiffer concrete that will have relatively higher resistance to deformation.

10. Creep ___ as the age of application of load _____
a) Increase, increase
b) Increase, decrease
c) Decrease, decrease
d) Decrease, increase

Explanation: Creep decreases as the age of application of load increases, because of strength increases.

Sanfoundry Global Education & Learning Series – Concrete Technology.

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