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. |
What is the maximum frequency accepted for the spark gap converter, used in current production of high frequency induction furnace? |
| A. | 70,000 cycles/second |
| B. | 75,000 cycles/second |
| C. | 80,000 cycles/second |
| D. | 85,000 cycles/second |
| Answer» D. 85,000 cycles/second | |
| 2. |
What is the maximum frequency accepted for the motor, used in current production of high frequency induction furnace? |
| A. | 5000 cycles/second |
| B. | 10000 cycles/second |
| C. | 7500 cycles/second |
| D. | 12500 cycles/second |
| Answer» C. 7500 cycles/second | |
| 3. |
WHAT_IS_THE_MAXIMUM_FREQUENCY_ACCEPTED_FOR_THE_SPARK_GAP_CONVERTER,_USED_IN_CURRENT_PRODUCTION_OF_HIGH_FREQUENCY_INDUCTION_FURNACE??$ |
| A. | 70,000 cycles/second |
| B. | 75,000 cycles/second |
| C. | 80,000 cycles/second |
| D. | 85,000 cycles/second |
| Answer» D. 85,000 cycles/second | |
| 4. |
WHAT_IS_THE_MAXIMUM_FREQUENCY_ACCEPTED_FOR_THE_MOTOR,_USED_IN_CURRENT_PRODUCTION_OF_HIGH_FREQUENCY_INDUCTION_FURNACE??$ |
| A. | 5000 cycles/second |
| B. | 10000 cycles/second |
| C. | 7500 cycles/second |
| D. | 12500 cycles/second |
| Answer» C. 7500 cycles/second | |
| 5. |
What is the minimum frequency accepted for the spark gap converter, used in current production of high frequency induction furnace? |
| A. | 10,000 cycles/second |
| B. | 15,000 cycles/second |
| C. | 20,000 cycles/second |
| D. | 25,000 cycles/second |
| Answer» D. 25,000 cycles/second | |
| 6. |
In high frequency induction furnace, time taken by charge to melt is long. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
What is the minimum frequency accepted for the motor, used in current production of high frequency induction furnace? |
| A. | 430 cycles/second |
| B. | 500 cycles/second |
| C. | 550 cycles/second |
| D. | 600 cycles/second |
| Answer» C. 550 cycles/second | |
| 8. |
How much is the thermal efficiency of a coreless high frequency induction furnace? |
| A. | 50% |
| B. | 60% |
| C. | 70% |
| D. | 80% |
| Answer» C. 70% | |
| 9. |
Which currents are used for inducing heat in the high frequency induction furnace? |
| A. | Alternating primary currents |
| B. | Direct primary currents |
| C. | Alternating secondary currents |
| D. | Direct secondary currents |
| Answer» D. Direct secondary currents | |
| 10. |
What causes uniformity in the melt composition? |
| A. | Electric stirring |
| B. | Electric shaking |
| C. | Magnetic stirring |
| D. | Magnetic shaking |
| Answer» D. Magnetic shaking | |
| 11. |
A high frequency induction furnace can melt metal up to what mass? |
| A. | 10 tons |
| B. | 11 tons |
| C. | 12 tons |
| D. | 13 tons |
| Answer» D. 13 tons | |
| 12. |
The oil of which metal is used in high frequency induction furnace? |
| A. | Zinc |
| B. | Copper |
| C. | Aluminium |
| D. | Iron |
| Answer» C. Aluminium | |