MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your GATE practice papers - Mechanical knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which type of material is difficult to spot weld? (Marks: 02) |
| A. | highly resistive materials |
| B. | highly conductive materials |
| C. | both a. and b. |
| D. | none of the above |
| Answer» C. both a. and b. | |
| 2. |
What is the effect of cold working process on material grains? (Marks: 02) |
| A. | material grains distort permanently |
| B. | material grains distort temporarily and again come back to original shape slowly |
| C. | material grains remains as it is |
| D. | can't say |
| Answer» B. material grains distort temporarily and again come back to original shape slowly | |
| 3. |
Why is the copper suitable to use as filler for joining iron and silver? (Marks: 02) |
| A. | copper is soluble in iron |
| B. | copper is soluble in silver |
| C. | both a. and b. |
| D. | none of the above |
| Answer» D. none of the above | |
| 4. |
Which process is best suitable to increase strength of material and to decrease ductility after processing? (Marks: 02) |
| A. | Hot working |
| B. | Cold working |
| C. | both a. and b. |
| D. | none of the above |
| Answer» C. both a. and b. | |
| 5. |
What is the effect of hot working process on material density? (Marks: 02) |
| A. | material density decreases in hot working process |
| B. | material density increases in hot working process |
| C. | material density remains same in hot working process |
| D. | unpredictable |
| Answer» C. material density remains same in hot working process | |
| 6. |
Which of the following is NOT a type of hot working?(Marks: 01) |
| A. | Rolling |
| B. | Pipe welding |
| C. | Forging |
| D. | none of the above |
| Answer» E. | |
| 7. |
The forming process in which the working temperature is lower than the recrystallization temperature is called as ________(Marks: 01) |
| A. | hot forming |
| B. | cold forming |
| C. | crystalline forming |
| D. | none of the above |
| Answer» C. crystalline forming | |
| 8. |
Which is the material represented in below stress-strain curve? (Marks: 02) |
| A. | Rigid ideal plastic material |
| B. | Ideal plastic material with elastic region |
| C. | Ideal elastic material |
| D. | none of the above |
| Answer» C. Ideal elastic material | |
| 9. |
What is the cause of formation of blow holes in metal casting? (Marks: 02) |
| A. | excessive moisture |
| B. | presence of such ingredients which produce gas |
| C. | fine grains |
| D. | all of the above |
| Answer» E. | |