MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Casting knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
WHICH_OF_THE_FOLLOWING_ADDITIVES_ARE_ADDED_TO_THE_SAND_IN_CO2_MOULDING_FOR_THE_IMPROVEMENT_IN_COLLAPSIBILITY_OF_THE_SAND??$ |
| A. | Copper oxide |
| B. | Wood flour |
| C. | Aluminium oxide |
| D. | Oil |
| Answer» D. Oil | |
| 2. |
Moisture from the mould can be removed by using of dryer or heater in Co2 moulding.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
Co2_moulding_process_is_an_ideal_process,_where_speed_and_flexibility_is_the_prime_requirement.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Co2 moulding is a kind of sand moulding, but it is not economical than the green sand moulding. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
It is very safe to use Co2 in Co2 moulding, so it eliminates the use of any shielding apparatus? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Sometimes over-gassing can cause the sticking of pattern to the mould in Co2 moulding. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
Additives can be used for the non-ferrous application to avoid the poor collapsibility of the mould. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
How much time (in a minute) is usually required for the passing of Co2 through the mould? |
| A. | One |
| B. | Two |
| C. | Five |
| D. | Seven |
| Answer» B. Two | |
| 9. |
Continuous passing of Co2 through the mould can decrease the strength of mould and results in a weak mould. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
How much percentage of sodium silicate (Na2SiO3) is added to the sand mixture in Co2 moulding? |
| A. | 0 to 2 % |
| B. | 2 to 6 % |
| C. | 6 to 10 % |
| D. | 10 to 14 % |
| Answer» C. 6 to 10 % | |
| 11. |
Co2 moulding is mainly used for the increase in strength and hardness of the moulds and cores. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
Which of the following moulds or moulding is also known as sodium silicate process. |
| A. | Shell moulding |
| B. | Permanent moulding |
| C. | Slush moulding |
| D. | Co<sub>2</sub> moulding |
| Answer» E. | |