MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Design knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If shaft diameter is 30mm and number of pins emplaced are 6, then the diameter of the pin will be? |
| A. | 6.4mm |
| B. | 5.6mm |
| C. | 6.1mm |
| D. | 5.9mm |
| Answer» D. 5.9mm | |
| 2. |
Find the shear stress in a flange at the junction of hub in rigid flanged coupling if torsional moment is 2980N-m and diameter of hub being 125mm. Also the thickness of flange is 25mm. |
| A. | 6.77N/mm |
| B. | 10.24N/mm |
| C. | 4.84N/mm |
| D. | 4.22N/mm |
| Answer» D. 4.22N/mm | |
| 3. |
The hub is treated as a solid shaft while calculating torsional shear stress in the hub. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
Determine the diameter of the bolts used in rigid flange coupling if transmitted torque is 270N-m, pitch circle diameter=125mm and four bolts are emplace in the coupling. Permissible shear stress in the bolts is 70N/mm . |
| A. | 3.8mm |
| B. | 3.6mm |
| C. | 4.4mm |
| D. | 4mm |
| Answer» D. 4mm | |
| 5. |
If shaft diameter is 60mm, how many bolts are recommended for rigid flange coupling? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» D. 5 | |
| 6. |
Power is transmitted by only in rigid flange coupling. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
If 8 bolts are emplaced in a clamp coupling with shaft diameter 80mm d, calculate the diameter of each bolt if coefficient of friction is 0.3 and torque transmitted is 4000N-m. Permissible tensile stress is 80N/mm . |
| A. | 27mm |
| B. | 25mm |
| C. | 23mm |
| D. | 21mm |
| Answer» B. 25mm | |
| 8. |
If 8 bolts are emplaced in a clamp coupling with shaft diameter 80mm d, calculate the tensile force on each bolt if coefficient of friction is 0.3 and torque transmitted is 4000N-m. |
| A. | 51234.4N |
| B. | 45968.3N |
| C. | 41666.7N |
| D. | None of the listed |
| Answer» D. None of the listed | |
| 9. |
If shaft diameter is 40mm, calculate the length of sleeves in clamp coupling. |
| A. | 80mm |
| B. | 140mm |
| C. | 100mm |
| D. | 120mm |
| Answer» C. 100mm | |
| 10. |
If shaft diameter is 40mm, calculate the diameter of sleeves in clamp coupling. |
| A. | 100mm |
| B. | 80mm |
| C. | 60mm |
| D. | 40mm |
| Answer» B. 80mm | |
| 11. |
Does shaft has to be shifted i axial direction to remove clamp coupling. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 12. |
Entire torque is transmitted by friction in the clamp coupling. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
Clamp coupling employ bolts. |
| A. | True |
| B. | False |
| Answer» B. False | |