MCQOPTIONS
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MCQOPTIONS
This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Casting knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The deduction of cooling rate from a simple heat balance can only be possible when the process is isothermal and the specific heats of the liquid and the solid are same. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
What should be the value of biot number (Bi) for chill mould castings? |
| A. | Less than 1 |
| B. | Greater than 1 |
| C. | Greater than 5 |
| D. | Greater than 11 |
| Answer» B. Greater than 1 | |
| 3. |
The transfer of heat across a gap (an interface between mould and casting) is given by_____ |
| A. | q = h+∆T |
| B. | q = h/∆T |
| C. | q = h*∆T |
| D. | q = h-∆T |
| Answer» D. q = h-∆T | |
| 4. |
The scale of segregation cannot be reduced or avoided by implementing any kind of method. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
Which of the following is independent of the solidification time of the casting? |
| A. | Mould material |
| B. | Chaplets |
| C. | Heat transfer coefficient |
| D. | Mould wall temperature |
| Answer» C. Heat transfer coefficient | |
| 6. |
The solidification time can be increased by increasing the thickness of the mould. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
THE_TRANSFER_OF_HEAT_ACROSS_A_GAP_(AN_INTERFACE_BETWEEN_MOULD_AND_CASTING)_IS_GIVEN_BY_____?$ |
| A. | q = h+∆T |
| B. | q = h/∆T |
| C. | q = h*∆T |
| D. | q = h-∆T |
| Answer» D. q = h-‚Äö√Ñ√∂‚àö‚Ć‚àö√∫T | |
| 8. |
The deduction of cooling rate from a simple heat balance can only be possible when the process is isothermal and the specific heats of the liquid and the solid are same.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
What_should_be_the_value_of_biot_number_(Bi)_for_chill_mould_castings?$ |
| A. | Less than 1 |
| B. | Greater than 1 |
| C. | Greater than 5 |
| D. | Greater than 11 |
| Answer» B. Greater than 1 | |
| 10. |
Increase in mould thickness always decreases the rate of solidification of casting material. |
| A. | True |
| B. | False |
| Answer» C. | |
| 11. |
The scale of segregation cannot be reduced or avoided by implementing any kind of method? |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
Refractory coating to the metallic mould helps in reducing the chilling effect on the casting. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
Casting which is cooled quickly generally have coarse grain structure. |
| A. | True |
| B. | False |
| Answer» C. | |
| 14. |
Which of the following is independent to the solidification time of the casting? |
| A. | Mould material |
| B. | Chaplets |
| C. | Heat transfer coefficient |
| D. | Mould wall temperature |
| Answer» C. Heat transfer coefficient | |
| 15. |
Feeding of an alloy in the mould is considered to be difficult if centre-line feeding resistance (CFR) is_____ |
| A. | greater than 70% |
| B. | less than 70% |
| C. | less than 20% |
| D. | 0% |
| Answer» B. less than 70% | |
| 16. |
A large shape of a riser is mainly used for the casting of grey cast iron. |
| A. | True |
| B. | False |
| Answer» C. | |
| 17. |
The solidification time can be increased by increasing thickness of the mould. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 18. |
Which of the following is mostly analyzes during the casting and solidification of casting material? |
| A. | Mould coating |
| B. | Mould material |
| C. | Mould aesthetics |
| D. | Heat transfer |
| Answer» E. | |