MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 20 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. |
The brake shown in figure has a coefficient of friction 0.25 and is to operate using a maximum force F of 500 N. Assume width of the band to be 50 mm, find the braking torque. |
| A. | 380.2 N |
| B. | 357.8 N |
| C. | 444.3 N |
| D. | 320.3 N |
| Answer» C. 444.3 N | |
| 2. |
The brake shown in figure has a coefficient of friction 0.25 and is to operate using a maximum force F of 500 N. Assume width of the band to be 50 mm. Find the maximum band tension. All dimensions are in mm. |
| A. | 4449.6 N |
| B. | 4440.8 N |
| C. | 5432.4 N |
| D. | 4882.3 N |
| Answer» B. 4440.8 N | |
| 3. |
For a double block shoe brake, the braking action is halved. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
Drawback of a single block brake is __________ |
| A. | Bending of shaft |
| B. | Twisting of shaft |
| C. | Tension in shaft |
| D. | Tension in bearings |
| Answer» B. Twisting of shaft | |
| 5. |
If the angle of contact is greater than 60 degrees, then unit pressure normal to the surface of contact is __________ |
| A. | Less at the ends than at the centre |
| B. | More at the ends then centre |
| C. | Remains equal at the ends and the centre |
| D. | Remains unaffected |
| Answer» B. More at the ends then centre | |
| 6. |
The combined mass of bicycle and rider is 100 kg, they are travelling at the speed of 16 km/h on a level road. Diameter of rear wheel is 0.9m. The pressure applied on the brake is 100 N and μ = 0.05., find the no. of revolutions made by the bicycle before it comes to rest. |
| A. | 35 |
| B. | 140 |
| C. | 70 |
| D. | 84 |
| Answer» D. 84 | |
| 7. |
The combined mass of bicycle and rider is 100 kg, they are travelling at the speed of 16 km/h on a level road. Diameter of rear wheel is 0.9m. How far will the bicycle travel after the application of brake? The pressure applied on the brake is 100 N and μ = 0.05. |
| A. | 200.1 m |
| B. | 197.2 m |
| C. | 98.6 m |
| D. | 124.3 m |
| Answer» C. 98.6 m | |
| 8. |
In which of the following brakes the force acting on the brake drum is in axial direction? |
| A. | Block brake |
| B. | Shoe brake |
| C. | Band brake |
| D. | Cone brake |
| Answer» E. | |
| 9. |
Electric brakes are used to control the speed of vehicle during downhill travel. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Which of the following type of brakes can bring the member to an absolute rest? |
| A. | Hydraulic |
| B. | Electric |
| C. | Mechanical |
| D. | Fluid agitator |
| Answer» D. Fluid agitator | |
| 11. |
An automobile brake is only used to reduce the speed or bring the vehicle to hault. |
| A. | Yes |
| B. | No, it also be used to hold the car |
| C. | Brake acts only onmoving vehicles |
| D. | None of the mentioned |
| Answer» C. Brake acts only onmoving vehicles | |
| 12. |
A solid cast iron disk of mass 1000kg is rotating at 350rpm. Diameter of the disk is 1m and time taken to come to stop the disk by brake is 1.6sec.Square of radius of gyration is 0.2. Calculate the torque capacity of the brake. |
| A. | 812.4N-m |
| B. | 4583.6N-m |
| C. | 612.4N-m |
| D. | Noe of the listed |
| Answer» C. 612.4N-m | |
| 13. |
AN_AUTOMOBILE_BRAKE_IS_ONLY_USED_TO_REDUCE_THE_SPEED_OR_BRING_THE_VEHICLE_TO_HAULT.?$ |
| A. | Yes |
| B. | No, it also be used to hold the car |
| C. | Brake acts only onmoving vehicles |
| D. | None of the mentioned |
| Answer» C. Brake acts only onmoving vehicles | |
| 14. |
A solid cast iron disk of mass 1000kg is rotating at 350rpm. Diameter of the disk is 1m and time taken to come to stop the disk by brake is 1.6sec.Square of radius of gyration is 0.2. Calculate the angle through which disk rotated during braking period. |
| A. | 27.5rad |
| B. | 24.6rad |
| C. | 29.3rad |
| D. | 32.4rad |
| Answer» D. 32.4rad | |
| 15. |
A solid cast iron disk of mass 1000kg is rotating at 350rpm. Diameter of the disk is 1m and time taken to come to stop the disk by brake is 1.6sec.Square of radius of gyration is 0.2. Calculate the average angular velocity during braking period. |
| A. | 15.45rad/s |
| B. | 17.32rad/s |
| C. | 18.32rad/s |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 16. |
A solid cast iron disk of mass 1000kg is rotating at 350rpm. Diameter of the disk is 1m and time taken to come to stop the disk by brake is 1.6sec.Calculate energy absorbed by the brake if square of radius of gyration is 0.2. |
| A. | None of the mentioned |
| B. | 134.3kJ |
| C. | 165.3kJ |
| D. | 134.2kJ |
| Answer» C. 165.3kJ | |
| 17. |
Internal shoe brakes are radial while external shoe brakes are axial brakes. |
| A. | True |
| B. | False |
| Answer» C. | |
| 18. |
Disc brakes are radial brakes. |
| A. | True |
| B. | False |
| Answer» C. | |
| 19. |
Pneumatic brakes are same as electrical brakes. |
| A. | Yes both are concerned with electricity |
| B. | No, one deals with pressure and other with electricity |
| C. | Yes both deals with pressure |
| D. | None of the listed |
| Answer» C. Yes both deals with pressure | |
| 20. |
The energy absorb by brake is always kinetic. |
| A. | No, potential |
| B. | Kinetic or potential |
| C. | Potential |
| D. | Strain Energy |
| Answer» C. Potential | |