MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Metallurgy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The total number of sheets which can be rolled together in a four high mill is equal to _________ |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 2. |
The total number of rolls involved in a three-high mill is _______ |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 10 |
| Answer» C. 4 | |
| 3. |
If the sheet is rolled along certain direction of rolling, the grain will deform in the sheet. The maximum deformation of grains occurs at the _____________ |
| A. | centre of sheet |
| B. | surface of sheet |
| C. | beginning of sheet |
| D. | end of sheet |
| Answer» C. beginning of sheet | |
| 4. |
A sheet of thickness 200 mm is rolled in a roller with roll diameter of 300 mm. If the coefficient of friction between the roll and sheet is 0.1. Find the minimum number of passes required to reduce the thickness of sheet to 180 mm? |
| A. | 2 |
| B. | 5 |
| C. | 7 |
| D. | 9 |
| Answer» D. 9 | |
| 5. |
Let angle of friction be equal to FA, and angle of bite be AB, the necessary condition for rolling to occur is ___________ |
| A. | FA=AB |
| B. | FA>AB |
| C. | FA<AB |
| D. | Rolling occurs on every possible angle |
| Answer» C. FA<AB | |
| 6. |
In the rolling of thick plates and sheets, the friction angle and angle of the bite are always equal to each other. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
In the case of four stands high mill, the diameter of the backing roll is ___________ the primary roll which remains in contact with workpiece. |
| A. | larger than |
| B. | smaller than |
| C. | same as |
| D. | depends upon the application |
| Answer» B. smaller than | |
| 8. |
If the thick slab needs to be directly reduced into thin sheet, which of the following is the best rolling mill to use? |
| A. | Two high mill |
| B. | Four high mill |
| C. | Planetary mill |
| D. | Continuous mill |
| Answer» D. Continuous mill | |
| 9. |
A roll diameter of 300 mm has a maximum possible reduction of 3 mm, find the angle of bite for the process? |
| A. | 10.25 |
| B. | 5.71 |
| C. | 18.32 |
| D. | 89.25 |
| Answer» C. 18.32 | |