MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A gear having a diameter of 40 cm transmits 10 kW at 250 r.p.m. If the pressure angle is 20°, the force on the tooth of the gear is: |
| A. | 2075 N |
| B. | 2100 N |
| C. | 1935 N |
| D. | 2030 N |
| Answer» E. | |
| 2. |
20° full depth involute profile 19 tooth pinion and 37 teeth gear are in mesh. If the module is 5 mm, then the center distance between the gear pair is |
| A. | 140 mm |
| B. | 150 mm |
| C. | 280 mm |
| D. | 300 mm |
| Answer» B. 150 mm | |
| 3. |
Lewis equation in gears is used to evaluate |
| A. | Tensile stress |
| B. | Bending stress |
| C. | Endurance limit |
| D. | Creep stress |
| Answer» C. Endurance limit | |
| 4. |
A spur gear with 20° full depth teeth is transmitting 20 kW at 200 rad/s. The pitch circle diameter of the gear is 100 mm. The magnitude of the force applied on the gear in the radial direction is |
| A. | 0.36 kN |
| B. | 0.73 kN |
| C. | 1.39 kN |
| D. | 2.78 kN |
| Answer» C. 1.39 kN | |
| 5. |
A spur gear has a module of 3 mm, number of teeth 16, a face width of 36 mm and a pressure angle of 20°. It is transmitting a power of 3 kW at 20 rev/s. Taking a velocity factor of 1.5, and Modified Lewis form factor of 0.3, the stress in the gear tooth is about |
| A. | 32 MPa |
| B. | 46 MPa |
| C. | 58 MPa |
| D. | 70 MPa |
| Answer» C. 58 MPa | |
| 6. |
For a vehicle travelling at 24 km/hr having a wheel radius of 0.305 m with overall gear ratio G = 19.915, and when torque transmitted is 203.6 N.m, the engine speed and power are, nearly |
| A. | 4155 rpm and 88.6 kW |
| B. | 4500 rpm and 88.6 kW |
| C. | 4155 rpm and 95.4 kW |
| D. | 4500 rpm and 95.4 kW |
| Answer» B. 4500 rpm and 88.6 kW | |
| 7. |
A 20º full depth involute spur pinion of 4 mm module and 21 teeth is to transmit 15 kW at 960 rpm. Its face width is 25 mm. Given that the tooth geometry factor is 0.32 and the combined effect of dynamic load and allied factors intensifying the stress is 1.5; the minimum allowable stress (in MPa) for the gear material is |
| A. | 242 |
| B. | 166.5 |
| C. | 121 |
| D. | 74 |
| Answer» C. 121 | |
| 8. |
For two meshing gears, their |
| A. | number of teeth must be same |
| B. | addendum must be same |
| C. | dedendum must be same |
| D. | module must be same |
| Answer» E. | |
| 9. |
In Lewis equation for bending stress, gear tooth is considered as |
| A. | Simply supported |
| B. | Cantilever beam |
| C. | Curved beam |
| D. | None of the above |
| Answer» C. Curved beam | |
| 10. |
Hardness is induced within the gear teeth to avoid _____. |
| A. | meshing |
| B. | wear |
| C. | pitting |
| D. | abrasion |
| Answer» C. pitting | |