MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Kinematics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Two mating spur gears have 40 and 120 teeth respectively. The pinion rotates at 1200 rpm and transmits a torque of 20 Nm. The torque transmitted by the gear is |
| A. | 6.6 Nm |
| B. | 20 Nm |
| C. | 40 Nm |
| D. | 60Nm |
| Answer» E. | |
| 2. |
If the pressure angle of the rack is 20 , then force acting along the line of action between the rack and the gear teeth is |
| A. | 250 N |
| B. | 342 N |
| C. | 532 N |
| D. | 600 N |
| Answer» D. 600 N | |
| 3. |
If the drive efficiency is 80%, then torque required on the input shaft to create 1000 N output thrust is |
| A. | 20 Nm |
| B. | 25 Nm |
| C. | 32 Nm |
| D. | 50 Nm |
| Answer» C. 32 Nm | |
| 4. |
Twenty degree full depth involute profiled 19-tooth pinion and 37-tooth gear are in mesh. If the module is 5 mm, the centre distance between the gear pair will be |
| A. | 140 mm |
| B. | 150 mm |
| C. | 280 mm |
| D. | 300 mm |
| Answer» B. 150 mm | |
| 5. |
Interference in a pair of gears is avoided, if the addendum circles of both the gears intersect common tangent to the base circles within the points of tangency. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Tooth interference in an external in volute spur gear pair can be reduced by |
| A. | Decreasing center distance between gear pair |
| B. | Decreasing module |
| C. | Decreasing pressure angle |
| D. | Increasing number of gear teeth |
| Answer» E. | |
| 7. |
A helical gear has the active face width equal to b pitch p and helix angle . What should be the minimum value of b in order that contact is maintained across the entire active face of the gear? |
| A. | p cos |
| B. | p sec |
| C. | p tan |
| D. | p cot |
| Answer» E. | |
| 8. |
A spur gear of 40 teeth is machined in a gear hobbing machine using a double start hob cutter. The speed ratio between the hob and the blank is |
| A. | 1:20 |
| B. | 1:40 |
| C. | 40:1 |
| D. | 20:1 |
| Answer» E. | |