MCQOPTIONS
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MCQOPTIONS
This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Mechanics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Aquaplaning occurs in vehicle tires when there is continuous film of fluid between the tyre and the wet road. It leads to |
| A. | Oscillatory motion of the vehicle |
| B. | Jamming the brakes of the vehicle |
| C. | Jamming the steering mechanism of the vehicle |
| D. | loss of control of the vehicle. |
| Answer» E. | |
| 2. |
A ball is dropped on a smooth horizontal surface from height ‘h’. What will be the height of rebounce after second impact, if coefficient of restitution between ball and surface is ‘e’? |
| A. | eh |
| B. | e2h |
| C. | e3h |
| D. | e4h |
| Answer» E. | |
| 3. |
An object of mass 11 kg is moving with a uniform velocity fo 5 ms-1. What is the kinetic energy possessed by the object? |
| A. | 17.5 J |
| B. | 137.5 J |
| C. | 137.5 ms |
| D. | 180.5 J |
| Answer» C. 137.5 ms | |
| 4. |
In the offshore region at a particular harbour facility, an oscillatory wave train approaches with wavelength of 80 m where the mean sea depth is 30 m. What would be the velocity of the individual waves? |
| A. | 17.15 m/s |
| B. | 16.05 m/s |
| C. | 14.05 m/s |
| D. | 15.15 m/s |
| Answer» B. 16.05 m/s | |
| 5. |
If the water in a stream is flowing with a velocity of 20 kmph and a boat is travelling from one bank to another bank, if the velocity of the boat in a direction perpendicular to the direction of the stream is 20 kmph and width of the stream is 2 km, then the time taken and the angle which boat makes with the direction of stream is |
| A. | 6 min, 45° |
| B. | 9 min, 30° |
| C. | 12 min, 60° |
| D. | 9 min, 90° |
| Answer» B. 9 min, 30° | |
| 6. |
For proper planning of harbours, oscillatory wave in the relevant off shore region must be taken into account. If the sea depth in 30 m and an oscillatory wave train is observed to have wavelength of 50 m, what would be the velocity of the individual waves? |
| A. | 9.43 m/s |
| B. | 9.21 m/s |
| C. | 9.08 m/s |
| D. | 8.83 m/s |
| Answer» E. | |
| 7. |
If a particle is in static equilibrium, then the work done by the system of force acting on that particle is: |
| A. | Negative |
| B. | Infinity |
| C. | Zero |
| D. | Positive |
| Answer» D. Positive | |
| 8. |
An object of weight 49 N is accelerated across a level surface at 0.20 m/s2. The net force acting on the object is (g = 9.8 m/s2) |
| A. | 9.8 N |
| B. | 1.0 N |
| C. | 5.0 N |
| D. | 0.5 N |
| Answer» C. 5.0 N | |
| 9. |
An unstable vibratory motion due to combined bending and torsion which occurs in flexible plate like structures is called |
| A. | Galloping |
| B. | Ovalling |
| C. | Flutter |
| D. | Oscillation |
| Answer» D. Oscillation | |
| 10. |
A car is traveling on a curved road of radius 300 m at speed of 15 m/s. The normal and tangential components of acceleration respectively are given by: |
| A. | zero, zero |
| B. | zero, 0.75 m/s2 |
| C. | 0.75 m/s2, zero |
| D. | 0.75 m/s2, 0.75 m/s2 |
| Answer» D. 0.75 m/s2, 0.75 m/s2 | |
| 11. |
One Newton’s force produces an acceleration of |
| A. | 1 cm/sec2 while acting on a body of 1 gm mass |
| B. | 1 cm/sec2 while acting on a body of 1 kg mass |
| C. | 1 m/sec2 while acting on a body of 1 kg mass |
| D. | 1 m/sec2 while acting on a body of 1 gm mass |
| Answer» D. 1 m/sec2 while acting on a body of 1 gm mass | |
| 12. |
A 5 kg mass at rest on a frictionless table is acted upon by a constant force of 12 N. The distance travelled by it in 2s is |
| A. | 1.2 m |
| B. | 2.4 m |
| C. | 4.8 m |
| D. | 9.6 m |
| Answer» D. 9.6 m | |
| 13. |
If a train of length 1000 m is cruising at a speed of 90 kmph and crosses a bridge of length 1000 m, what time does it take to completely pass the bridge? |
| A. | 25 s |
| B. | 80 s |
| C. | 30 s |
| D. | 400 s |
| Answer» C. 30 s | |
| 14. |
For the position of the mechanism shown in Figure, find the velocity of the slider B for the given configuration if the velocity of the slider A is 3 m / s. Consider AB as a rigid link and is parallel to CD at this instant. |
| A. | 3 m/s |
| B. | 3√2 m/s |
| C. | 3 / √2 m/s |
| D. | 1.5 m/s |
| Answer» B. 3√2 m/s | |
| 15. |
A circular disk of radius r is confined to roll without slipping at P and Q as shown in the figure.If the plates have velocities as shown, the magnitude of the angular velocity of the disk is |
| A. | v/r |
| B. | v/2r |
| C. | 2v/3r |
| D. | 3v/2r |
| Answer» E. | |
| 16. |
A heavy elastic ball drops from the ceiling of a room, and after rebounding once from the floor, reaches a height equal to three-fourth that of ceiling. The coefficient of restitution is |
| A. | √3/2 |
| B. | √(2)/3 |
| C. | 1/3 |
| D. | 1 |
| Answer» B. √(2)/3 | |
| 17. |
A truck of mass 1000 kg moving at a speed of 20 m/s is braked suddenly with a braking force of 5000 N. The distance travelled by truck before stopping is |
| A. | 20 m |
| B. | 30 m |
| C. | 40 m |
| D. | 80 m |
| Answer» D. 80 m | |
| 18. |
A single degree of freedom system of mass 22 kg and stiffness 17 kN/m vibrates freely. If damping in the system is 2%, the cyclic frequency and the damped circular frequency, respectively, are nearly |
| A. | 4.4 Hz and 0.88 rad/sec |
| B. | 0.88 Hz and 27.8 rad/sec |
| C. | 4.4 Hz and 27.8 rad/sec |
| D. | 0.88 Hz and 0.88 rad/sec |
| Answer» D. 0.88 Hz and 0.88 rad/sec | |