MCQOPTIONS
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MCQOPTIONS
This section includes 29 Mcqs, each offering curated multiple-choice questions to sharpen your Materials Science knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Creep ___ as the age of application of load _____ |
| A. | Increase, increase |
| B. | Increase, decrease |
| C. | Decrease, decrease |
| D. | Decrease, increase |
| Answer» E. | |
| 2. |
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 |
| Answer» C. High elastic modulus aggregate will produce a stiffer concrete that will have relatively lower resistance to deformation | |
| 3. |
When concrete is loaded it experiences a large strain upon loading known as _____________ |
| A. | Differential elastic strain |
| B. | Instantaneous elastic strain |
| C. | Differential inelastic strain |
| D. | Instantaneous inelastic strain |
| Answer» C. Differential inelastic strain | |
| 4. |
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 |
| D. | Admixtures |
| Answer» D. Admixtures | |
| 5. |
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) |
| Answer» B. Eshort *(1+θ) | |
| 6. |
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 |
| Answer» D. Creep effect | |
| 7. |
Creep is ____________ |
| A. | Time dependent |
| B. | Time independent |
| C. | Pressure dependent |
| D. | Temperature dependent |
| Answer» B. Time independent | |
| 8. |
Diffusion creep is a type of creep. The slope of a strain-time graph increases with the increase in temperature. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
What is the nature of the curve of a viscous creep? |
| A. | Parabola |
| B. | Hyperbola |
| C. | Straight line passing through an origin |
| D. | Circle |
| Answer» D. Circle | |
| 10. |
Which of the following isn’t a stage of creep? |
| A. | Transient creep stage |
| B. | Constant creep stage |
| C. | Fracture stage |
| D. | Steady stage creep stage |
| Answer» C. Fracture stage | |
| 11. |
Which of the following is a slow rise of plastic deformation under the action of shear stresses when it is below the yield strength of the material? |
| A. | Brittle fracture |
| B. | Ductile fracture |
| C. | Creep |
| D. | Fatigue |
| Answer» D. Fatigue | |
| 12. |
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 |
| Answer» C. High elastic modulus aggregate will produce a stiffer concrete that will have relatively lower resistance to deformation | |
| 13. |
WHAT_IS_THE_NATURE_OF_THE_CURVE_OF_A_VISCOUS_CREEP??$ |
| A. | Parabola |
| B. | Hyperbola |
| C. | Straight line passing through an origin |
| D. | Circle |
| Answer» D. Circle | |
| 14. |
Creep ___ as the age of application of load _____$ |
| A. | Increase, increase |
| B. | Increase, decrease |
| C. | Decrease, decrease |
| D. | Decrease, increase |
| Answer» E. | |
| 15. |
Diffusion_creep_is_a_type_of_creep._The_slope_of_a_strain-time_graph_increases_with_the_increase_in_temperature.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 16. |
When concrete is loaded it experiences a large strain upon loading known a? |
| A. | Differential elastic strain |
| B. | Instantaneous elastic strain |
| C. | Differential inelastic strain |
| D. | Instantaneous inelastic strain |
| Answer» C. Differential inelastic strain | |
| 17. |
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 |
| D. | Admixtures |
| Answer» D. Admixtures | |
| 18. |
Above what temperature is the phenomenon of creep important in steel? |
| A. | 200 °C |
| B. | 500 °C |
| C. | 300 °C |
| D. | 600 °C |
| Answer» D. 600 ¬¨¬®‚Äö√†√ªC | |
| 19. |
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 |
| Answer» C. Equal to | |
| 20. |
Creep depends on temperature. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 21. |
This strain increases over time due to _________ |
| A. | Creep |
| B. | Elastic modulus |
| C. | Short term modulus of elasticity |
| D. | Long term modulus of elasticity |
| Answer» B. Elastic modulus | |
| 22. |
In which of the following stages do the deformation rate increases and causes failure? |
| A. | Transient creep stage |
| B. | Constant creep stage |
| C. | Fracture stage |
| D. | Steady stage creep stage |
| Answer» D. Steady stage creep stage | |
| 23. |
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 |
| Answer» D. Elastic modulus | |
| 24. |
In which of the stages, do we observe a constant deformation rate? |
| A. | Transient creep stage |
| B. | Constant creep stage |
| C. | Fracture stage |
| D. | Steady stage creep stage |
| Answer» E. | |
| 25. |
If θ is creep coefficient then what is Elong?$ |
| A. | E<sub>short</sub> /(1+θ) |
| B. | E<sub>short</sub> *(1+θ) |
| C. | E<sub>avg</sub> /(1+θ) |
| D. | E<sub>avg</sub> *(1+θ) |
| Answer» B. E<sub>short</sub> *(1+‚âà√≠‚Äö√†√®) | |
| 26. |
Which of the following stage is also known as the unstable stage? |
| A. | Transient creep stage |
| B. | Constant creep stage |
| C. | Fracture stage |
| D. | Steady stage creep stage |
| Answer» B. Constant creep stage | |
| 27. |
If 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 |
| Answer» D. Creep effect | |
| 28. |
Which of the following isn’t a stage of creep?$ |
| A. | Transient creep stage |
| B. | Constant creep stage |
| C. | Fracture stage |
| D. | Steady stage creep stage |
| Answer» C. Fracture stage | |
| 29. |
Which of the following is a slow rise of plastic deformation under the action of stresses? |
| A. | Brittle fracture |
| B. | Ductile fracture |
| C. | Creep |
| D. | Fatigue |
| Answer» D. Fatigue | |