MCQOPTIONS
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MCQOPTIONS
This section includes 11 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 amount of sea coal needed in cast irons for large green casting moulding sands? |
| A. | 10% |
| B. | 15% |
| C. | 20% |
| D. | 25% |
| Answer» B. 15% | |
| 2. |
WHICH_OF_THE_FOLLOWING_INCREASES_DRY_STRENGTH_OF_THE_SAND??$ |
| A. | Iron oxides |
| B. | Fuel oils |
| C. | Cereals |
| D. | Dextrin and molasses |
| Answer» E. | |
| 3. |
How much should fuel oil be added to increase the moulding ability of sand?$ |
| A. | 0.01% – 0.1% |
| B. | 0.02% – 0.2% |
| C. | 0.03% – 0.3% |
| D. | 0.04% – 0.4% |
| Answer» B. 0.02% ‚Äö√Ñ√∂‚àö√ë‚àö¬® 0.2% | |
| 4. |
Cereals improve flowability and lowers collapsibility.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
Pitch maybe used up to what percent? |
| A. | 1% |
| B. | 2% |
| C. | 3% |
| D. | 4% |
| Answer» C. 3% | |
| 6. |
At what temperature is pitch distilled from soft coals? |
| A. | 400°F |
| B. | 500°F |
| C. | 600°F |
| D. | 700°F |
| Answer» D. 700¬¨¬®‚Äö√†√ªF | |
| 7. |
What is the amount of sea coal needed in cast irons for small casting moulding sands? |
| A. | 1% |
| B. | 2% |
| C. | 3% |
| D. | 4% |
| Answer» B. 2% | |
| 8. |
For bonding action of clays, what is the amount of water needed? |
| A. | 1.5%-8% |
| B. | 3.5%-11% |
| C. | 4.5%-12% |
| D. | 5.5%-13% |
| Answer» B. 3.5%-11% | |
| 9. |
What does the clay particle absorb in electrostatic bonding theory? |
| A. | Complete water |
| B. | H<sup>+</sup> ions |
| C. | OH<sup>–</sup>ions |
| D. | Sand grains |
| Answer» D. Sand grains | |
| 10. |
In which of the following bonding theory, water molecules break down to form H+ and OH- ions? |
| A. | Electrostatic bonding theory |
| B. | Hot strength theory |
| C. | Surface tension theory |
| D. | Block and wedge theory |
| Answer» B. Hot strength theory | |
| 11. |
Which of the following is not a bonding theory? |
| A. | Electrostatic bonding theory |
| B. | Hot strength theory |
| C. | Surface tension theory |
| D. | Block and wedge theory |
| Answer» C. Surface tension theory | |