MCQOPTIONS
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MCQOPTIONS
This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Foundry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Short gassing time is highly effective in CO2 molding. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Rough patterns are difficult to withdraw from CO2 molding. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Overgasing increases the core strength. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
_____________ increases SiO2-Na2O ratio that increases the bond. |
| A. | Sulphuric acid |
| B. | Acetic acid |
| C. | Carbonic acid |
| D. | Hydrochloric acid |
| Answer» D. Hydrochloric acid | |
| 5. |
Clay is used in the CO2 molding process. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
CO2 used in CO2 molding is at high pressure. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
________________ is the binder used in the CO2 moulding. |
| A. | Silica sand |
| B. | Sodium Silicate |
| C. | Sodium Carbonate |
| D. | Alumina |
| Answer» C. Sodium Carbonate | |
| 8. |
The use of CO2 was to __________ the sand mould. |
| A. | Harden |
| B. | Soften |
| C. | Dry |
| D. | Clean |
| Answer» B. Soften | |
| 9. |
ROUGH_PATTERNS_ARE_DIFFICULT_TO_WITHDRAW_FROM_CO2_MOLDING.?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Short_gassing_time_is_highly_effective_in_CO2_molding.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
Overgasing increases the core strength? |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
The additives in sodium silicate are ____________ |
| A. | Sugar |
| B. | Dextrin |
| C. | Molasses |
| D. | Zircon |
| Answer» C. Molasses | |
| 13. |
_____________ increases SiO2-Na2O ratio that increases the bond. |
| A. | Sulphuric acid |
| B. | Acetic acid |
| C. | Carbonic acid |
| D. | Hydrochloric acid |
| Answer» D. Hydrochloric acid | |
| 14. |
Clay is used in the CO2 molding process. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 15. |
If gas is passed longer than required, the bond becomes ____________ |
| A. | Impaired |
| B. | Stronger |
| C. | Weaker |
| D. | Does not affect much |
| Answer» B. Stronger | |
| 16. |
CO2 used in CO2 molding is at high pressure. |
| A. | True |
| B. | False |
| Answer» C. | |
| 17. |
________________ is the binder used in the CO2 moulding. |
| A. | Silica sand |
| B. | Sodium Silicate |
| C. | Sodium Carbonate |
| D. | Alumina |
| Answer» C. Sodium Carbonate | |
| 18. |
The use of CO2 was to __________ the sand mould. |
| A. | Harden |
| B. | Soften |
| C. | Dry |
| D. | Clean |
| Answer» B. Soften | |