MCQOPTIONS
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MCQOPTIONS
This section includes 27 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Materials Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The temperature at which plastics begin to become softer and defer under a load is known as _________ |
| A. | Softening point |
| B. | Melting point |
| C. | Eutectic point |
| D. | Heat distortion point |
| Answer» E. | |
| 2. |
The coefficient of thermal expansion affects the heat resistance. |
| A. | False |
| B. | True |
| Answer» C. | |
| 3. |
The thermal conductivity of the aggregates is ______________ |
| A. | The ability to conduct the heat |
| B. | The ability to insulate the heat |
| C. | Is a measure of its heat capacity |
| D. | Same as thermal conductivity |
| Answer» B. The ability to insulate the heat | |
| 4. |
The specific heat of the aggregates is _____________ |
| A. | The ability to conduct the heat |
| B. | The ability to insulate the heat |
| C. | Is a measure of its heat capacity |
| D. | Same as thermal conductivity |
| Answer» D. Same as thermal conductivity | |
| 5. |
The linear thermal coefficient of expansion lies between approximately ____________ |
| A. | 5.4 * 10-6 and 12.6 * 10-6 per oC |
| B. | 10.8 * 10-6 and 16.2 * 10-6 per oC |
| C. | 5.8 * 10-6 and 14 * 10-6 per oC |
| D. | 10.8 * 10-6 and 12.6 * 10-6 per oC |
| Answer» D. 10.8 * 10-6 and 12.6 * 10-6 per oC | |
| 6. |
For hydrated Portland cement, the coefficient of thermal expansion lies between approximately ____________ |
| A. | 5.4 * 10-6 and 12.6 * 10-6 per oC |
| B. | 10.8 * 10-6 and 16.2 * 10-6 per oC |
| C. | 5.4 * 10-6 and 10.8 * 10-6 per oC |
| D. | 10.8 * 10-6 and 12.6 * 10-6 per oC |
| Answer» C. 5.4 * 10-6 and 10.8 * 10-6 per oC | |
| 7. |
For majority of aggregates, the coefficient of thermal expansion lies between approximately ____________ |
| A. | 5.4 * 10-6 and 12.6 * 10-6 per oC |
| B. | 10.8 * 10-6 and 16.2 * 10-6 per oC |
| C. | 5.4 * 10-6 and 10.8 * 10-6 per oC |
| D. | 10.8 * 10-6 and 12.6 * 10-6 per oC |
| Answer» B. 10.8 * 10-6 and 16.2 * 10-6 per oC | |
| 8. |
If the coefficient of the two materials differ by more than 5.4 * 10-6 per oC, then? |
| A. | Workability of concrete may freeze |
| B. | Durability of concrete subjected to freezing |
| C. | Durability of concrete subjected to boiling |
| D. | Workability of concrete subjected to boiling |
| Answer» C. Durability of concrete subjected to boiling | |
| 9. |
Coefficient of thermal expansion of concrete is __________ coefficient of thermal expansion in aggregates. |
| A. | Directly proportional |
| B. | Inversely proportional |
| C. | Equal |
| D. | More than |
| Answer» B. Inversely proportional | |
| 10. |
How many principal thermal properties are there for aggregates? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 11. |
THE_THERMAL_CONDUCTIVITY_OF_THE_AGGREGATES_IS_______________?$ |
| A. | The ability to conduct the heat |
| B. | The ability to insulate the heat |
| C. | Is a measure of its heat capacity |
| D. | Same as thermal conductivity |
| Answer» B. The ability to insulate the heat | |
| 12. |
WHAT_EFFECT_DO_THERMAL_VARIATIONS_IN_VOLUME_HAVE_ON_A_BODY??$ |
| A. | Expansion |
| B. | Contraction |
| C. | Cracking |
| D. | Phase transformation |
| Answer» D. Phase transformation | |
| 13. |
”The_coefficient_of_thermal_expansion_affects_the_heat_resistance”._Is_this_statement_true_or_false?$# |
| A. | False |
| B. | True |
| Answer» C. | |
| 14. |
The_temperature_at_which_plastics_begin_to_become_softer_and_defer_under_a_load_is_known_as__________$ |
| A. | Softening point |
| B. | Melting point |
| C. | Eutectic point |
| D. | Heat distortion point |
| Answer» E. | |
| 15. |
The specific heat of the aggregates is ____________? |
| A. | The ability to conduct the heat |
| B. | The ability to insulate the heat |
| C. | Is a measure of its heat capacity |
| D. | Same as thermal conductivity |
| Answer» D. Same as thermal conductivity | |
| 16. |
The linear thermal coefficient of expansion lies between approximately |
| A. | 5.4 * 10<sup>-6</sup> and 12.6 * 10<sup>-6</sup> per <sup>o</sup>C |
| B. | 10.8 * 10<sup>-6</sup> and 16.2 * 10<sup>-6</sup> per <sup>o</sup>C |
| C. | 5.8 * 10<sup>-6</sup> and 14 * 10<sup>-6</sup> per <sup>o</sup>C |
| D. | 10.8 * 10<sup>-6</sup> and 12.6 * 10<sup>-6</sup> per <sup>o</sup>C |
| Answer» D. 10.8 * 10<sup>-6</sup> and 12.6 * 10<sup>-6</sup> per <sup>o</sup>C | |
| 17. |
The ability of a body to withstand sudden and severe temperature changes is known as________ |
| A. | Thermal shock resistance |
| B. | Thermal resistance |
| C. | Thermal transmittance |
| D. | Deployment |
| Answer» B. Thermal resistance | |
| 18. |
For hydrated Portland cement, the coefficient of thermal expansion lies between approximately |
| A. | 5.4 * 10<sup>-6</sup> and 12.6 * 10<sup>-6</sup> per <sup>o</sup>C |
| B. | 10.8 * 10<sup>-6</sup> and 16.2 * 10<sup>-6</sup> per <sup>o</sup>C |
| C. | 5.4 * 10<sup>-6</sup> and 10.8 * 10<sup>-6</sup> per <sup>o</sup>C |
| D. | 10.8 * 10<sup>-6</sup> and 12.6 * 10<sup>-6</sup> per <sup>o</sup>C |
| Answer» C. 5.4 * 10<sup>-6</sup> and 10.8 * 10<sup>-6</sup> per <sup>o</sup>C | |
| 19. |
The melting point of Iron (Fe) is _________ |
| A. | 660<sup>o</sup>C |
| B. | 1084<sup>o</sup>C |
| C. | 419<sup>o</sup>C |
| D. | 1538<sup>o</sup>C |
| Answer» E. | |
| 20. |
For majority of aggregates, the coefficient of thermal expansion lies between approximately |
| A. | 5.4 * 10<sup>-6</sup> and 12.6 * 10<sup>-6</sup> per <sup>o</sup>C |
| B. | 10.8 * 10<sup>-6</sup> and 16.2 * 10<sup>-6</sup> per <sup>o</sup>C |
| C. | 5.4 * 10<sup>-6</sup> and 10.8 * 10<sup>-6</sup> per <sup>o</sup>C |
| D. | 10.8 * 10<sup>-6</sup> and 12.6 * 10<sup>-6</sup> per <sup>o</sup>C |
| Answer» B. 10.8 * 10<sup>-6</sup> and 16.2 * 10<sup>-6</sup> per <sup>o</sup>C | |
| 21. |
Which term is used to define the temperature at which a substance changes its status from solid to liquid? |
| A. | Boiling point |
| B. | Melting point |
| C. | Condensation point |
| D. | Freezing point |
| Answer» C. Condensation point | |
| 22. |
If the coefficient of the two materials differ by more than 5.4 * 10-6 per oC, then |
| A. | Workability of concrete may freeze |
| B. | Durability of concrete subjected to freezing |
| C. | Durability of concrete subjected to boiling |
| D. | Workability of concrete subjected to boiling |
| Answer» C. Durability of concrete subjected to boiling | |
| 23. |
What effect does the addition of thermal energy have on a material? |
| A. | Thermal contraction |
| B. | Thermal expansion |
| C. | No change |
| D. | Reproduction |
| Answer» C. No change | |
| 24. |
If the coefficient of thermal expansion of coarse aggregates and cement paste differs too much, then what happen? |
| A. | A small change in temperature may introduce |
| B. | No change |
| C. | A large change in temperature may introduce |
| D. | A small change in pressure may introduce |
| Answer» D. A small change in pressure may introduce | |
| 25. |
Specific heat of materials is expressed in terms of __________ |
| A. | W/m K |
| B. | J/K |
| C. | J/kg K |
| D. | m<sup>3</sup>/kg |
| Answer» D. m<sup>3</sup>/kg | |
| 26. |
Coefficient of thermal expansion of concrete is ___ coefficient of thermal expansion in aggregates. |
| A. | Directly proportional |
| B. | Inversely proportional |
| C. | Equal |
| D. | More than |
| Answer» B. Inversely proportional | |
| 27. |
The response of a material due to the function of heat is known as __________ |
| A. | Mechanical property |
| B. | Electrical property |
| C. | Chemical property |
| D. | Thermal property |
| Answer» E. | |