MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In the above problem, acceleration of crooshead at 30? phase equals |
| A. | 107 dynes |
| B. | 640 m/s2 |
| C. | 780 m/s2 |
| D. | 520 m/s2 |
| E. | 870 m/s2 |
| Answer» F. | |
| 2. |
A ball is allowed to fall freely from a height of 3 metres on to a fixed plate. If the successive rebound heights are h1, h2, h3 |
| A. | 5 metres |
| B. | 4.25 metre |
| C. | 0.5 metre |
| D. | 1 metre |
| E. | Zero |
| Answer» B. 4.25 metre | |
| 3. |
The common acceleration will be |
| A. | 1.5 m/s2 |
| B. | 1.0 m/s2 |
| C. | 107 dynes |
| D. | 6 m/s2 |
| E. | 3 m/s2 |
| Answer» C. 107 dynes | |
| 4. |
A body of weight 100 kg is placed on a horizontal plane. A horizontal force of 30 kg is applied and the block is just on the point of motion. The angle of friction is |
| A. | About 16? |
| B. | 30? |
| C. | 45? |
| D. | 60? |
| E. | None of the above |
| Answer» B. 30? | |
| 5. |
Power required for a train weighing 200 Mg to move at a uniform speed of 60 Kmph up an incline of 1 in 200 is (Resistance due to friction is negligible) |
| A. | 16.67 KW |
| B. | 163.5 KW |
| C. | 1000 KW |
| D. | 9810 KW |
| E. | Tapered bearing |
| Answer» C. 1000 KW | |
| 6. |
The number of revolutions through which a pulley will rotate from rest if its angular acceleration is increased uniformly from zero to 12 rad per sec2 during 4 sec and then uniformly decreased to 0 rad per sec2 during the next 3 sec would be |
| A. | 46.4 |
| B. | 26.74 |
| C. | 11.6 |
| D. | 3.2 |
| E. | 17.7 |
| Answer» C. 11.6 | |
| 7. |
In a slider crank mechanism, the crank is rotating at 200 rpm. If length of connecting rod is 8 mts and crank shaft is 2 mts, velocity of crosshead at 30? rotation of crank shaft equals. |
| A. | 30.2 m/s |
| B. | 33.2 m/s |
| C. | 35.8 mts/s |
| D. | 107 dynes |
| E. | 25.5 m/s |
| Answer» F. | |
| 8. |
A body in Simple Harmonic Motion will attain maximum velocity when it passes through |
| A. | Point of 0.75 amplitude |
| B. | Extreme point of the oscillation of L.H.S. |
| C. | Point of half amplitude |
| D. | Extreme point of the oscillation at R.H.S. |
| E. | Mean position |
| Answer» F. | |
| 9. |
The excape velocity for the moon is nearly |
| A. | 5 km/s |
| B. | 11.2 km/s |
| C. | 107 dynes |
| D. | 2.4 km/s |
| E. | 1.1 km/s |
| Answer» E. 1.1 km/s | |
| 10. |
A body is pushed with a force of 10 N for 0.5 second. The impulse given to the body is |
| A. | 107 dynes |
| B. | 50 Ns |
| C. | 3.5 Ns |
| D. | 5 Ns |
| E. | 2.5 Ns |
| Answer» E. 2.5 Ns | |
| 11. |
Williot-Mohr diagram is used to determine |
| A. | slope of beams |
| B. | 107 dynes |
| C. | deflection in beams |
| D. | deflection in trusses |
| E. | slope of trusses |
| Answer» E. slope of trusses | |
| 12. |
Which one of the following is not the law of dry friction? |
| A. | If friction is neglected, the reactions are always normal to the surfaces on contact |
| B. | Friction always acts to oppose the relative motion of the free body |
| C. | If static friction is acting, the value of the friction force may vary from zero to its maximum value |
| D. | The force of friction is always normal to the surface |
| E. | All of the above |
| Answer» E. All of the above | |
| 13. |
The tension T2 will be |
| A. | 60 N |
| B. | 5 N |
| C. | 107 dynes |
| D. | 15 N |
| E. | 30 N |
| Answer» F. | |
| 14. |
A block slides down a frictionless incline making an angle ? with an elevator floor. The acceleration relative to the incline will be maximum when |
| A. | the elevator ascends at constant speed v |
| B. | the elevator descends at constant speed v |
| C. | 107 dynes |
| D. | elevator descends with deceleration a |
| E. | the elevator descends with acceleration a |
| Answer» E. the elevator descends with acceleration a | |
| 15. |
If the angle of friction is zero a body will experience |
| A. | Infinite friction |
| B. | Zero friction |
| C. | The force of friction will act normal to the plane |
| D. | The force of friction will act in the direction of motion |
| E. | None of the above |
| Answer» C. The force of friction will act normal to the plane | |
| 16. |
A couple applied to a flywheel of mass 5 kg and of radius of gyration 20 cm produces an angular acceleration of 4 radians/sec2. The torque applied in dyne cm is |
| A. | 8 x 104 |
| B. | 8 x 106 |
| C. | 8 x 107 |
| D. | 8 x 108 |
| E. | 8 x 1010 |
| Answer» C. 8 x 107 | |
| 17. |
A body of weight W is resting at a plane inclined at 30? to the horizontal. It is attached to a string making an angle of 60? with horizontal. If the angle of friction be 30? the tension in the string would be |
| A. | Zero |
| B. | W |
| C. | W/2 |
| D. | 2W |
| E. | None of the above |
| Answer» D. 2W | |
| 18. |
A single purchase crab has a handle 45 cm long and a drum of 25 cm diameter. The pinion has 30 teeth and spur has 150 teeth. The efficiency of the machine is 75%. If the maximum force that can be applied is 500 newtons, the maximum load that can be lifted will be |
| A. | 9860 N |
| B. | 6750 N |
| C. | 20250 N |
| D. | 1250 N |
| E. | 13500 N |
| Answer» C. 20250 N | |
| 19. |
A 100 kg flywheel having a radius of gyration of 1 m is rotating at 1000 rpm. The angular momentum of the flywheel about its axis of rotation, in kg m2/s is |
| A. | 1000 |
| B. | 107 dynes |
| C. | 10,000 |
| D. | 10,470 |
| E. | 5235 |
| Answer» E. 5235 | |
| 20. |
A cannon of barrel length 2 m fires a shell of weight 6 kg with a muzzle velocity of 50 m/sec. The force exerted by the gases on the shell would be approximately |
| A. | 76 t |
| B. | 19 t |
| C. | 152 t |
| D. | 8.5 t |
| E. | 38 t |
| Answer» F. | |
| 21. |
According to the principle of transmissibility of forces, when a force acts upon a body ; its effect is |
| A. | Minimum when it acts at C.G. of the body |
| B. | Maximum when it acts at C.G. of the body |
| C. | Different at different points of body |
| D. | Same at every point in its line of action |
| E. | None of the above |
| Answer» E. None of the above | |
| 22. |
A cylindrical bar 10 metres long elongates 0.1 mm under a load. The strain in the material of the bar will be |
| A. | 10--4 |
| B. | 10--5 |
| C. | 10--7 |
| D. | All of the above |
| Answer» C. 10--7 | |
| 23. |
An iron sphere of mass 30 kg and an aluminium sphere of mass 10 kg, both having the same diameter are dropped vertically from a cliff. When they are 10 metrs from the ground, they have identical |
| A. | Accelerations |
| B. | Momenta |
| C. | Kinetic energies |
| D. | Potential energies |
| E. | All of the above |
| Answer» B. Momenta | |
| 24. |
If a solid sphere rolls on a horizontal surface, then the ratio of its rotational kinetic energy to its total kinetic energy is |
| A. | 1 ; 7 |
| B. | 3 ; 7 |
| C. | 107 dynes |
| D. | 4 ; 7 |
| E. | 2 ; 7 |
| Answer» F. | |
| 25. |
M.I. of sphere of 0.5 m radius about a mutually perpendicular axis (Z-axis) when its M.I. about X-axis and Y-axis are 50 kgm2 and 50 kgm2 is |
| A. | 50 Kgm2 |
| B. | Tapered bearing |
| C. | 100 Kgm2 |
| D. | 25 Kgm2 |
| E. | 12.5 Kgm2 |
| Answer» B. Tapered bearing | |
| 26. |
The resultant of coplaner parallel forces is found by load line diagram, while the position is found by |
| A. | link polygen |
| B. | funicular polygon |
| C. | string polygon |
| D. | any of the above |
| E. | 107 dynes |
| Answer» E. 107 dynes | |
| 27. |
Two forces of 6 and 8 kg act at right angles to each other, the resultant force will be |
| A. | 100 |
| B. | 28 |
| C. | 41 |
| D. | 14 |
| E. | 10 |
| Answer» F. | |
| 28. |
A weight of 4.9 N rests on a rough horizontal floor that has a coefficient of friction of 0.5. If g = 9.8 m/s2, the smallest horizontal force that gives the weight an acceleration of 4m/s2 is most nearly |
| A. | 2.5 N |
| B. | 3 N |
| C. | 2 N |
| D. | 4.5 N |
| E. | 4.9 N |
| Answer» E. 4.9 N | |
| 29. |
The limiting force of fiction is |
| A. | The friction force acting on a body when it is in motion |
| B. | The value of friction force which stops the movement of the body |
| C. | The value of friction force which cannot exceed under a situation |
| D. | The friction force acting when the body is just about to move |
| E. | Double of the normal friction |
| Answer» E. Double of the normal friction | |
| 30. |
When a train is rounding a curve to prevent side thrust on the wheel flanges of cars |
| A. | Opposite thrust is created to counter balance this thrust |
| B. | Guide rail sections are provided to take care of thrust |
| C. | Thrust eliminators are provided in the train |
| D. | Outside rails are realised |
| E. | Rail section is made thick on curvature |
| Answer» E. Rail section is made thick on curvature | |
| 31. |
A force F = 2i + 3j - k is passing through the origin. Its moment about point (1, 1, 0) is |
| A. | 107 dynes |
| B. | i + j + k |
| C. | 2i + 3j |
| D. | zero |
| E. | i - j - k |
| Answer» C. 2i + 3j | |
| 32. |
Which of the following is scalar quantity |
| A. | Area of triangle |
| B. | Displacement of a particle |
| C. | Acceleration of car |
| D. | Force of friction |
| E. | Velocity a gear |
| Answer» B. Displacement of a particle | |
| 33. |
Minimum horsepower of pump required for filling 50m3 water tank, 20 metres high from ground in 30 minutes by lifting water from a well 5 metres below the ground level is |
| A. | 5.45 KW |
| B. | 7.5 KW |
| C. | 6.81 KW |
| D. | Tapered bearing |
| E. | 66.8 KW |
| Answer» D. Tapered bearing | |
| 34. |
Te dimensions of frequency are |
| A. | 107 dynes |
| B. | MLT |
| C. | L-1 |
| D. | T-1 |
| E. | L-1T-1 |
| Answer» E. L-1T-1 | |
| 35. |
If three non-parallel forces hold a rigid body in equilibrium, they must |
| A. | be non-coneurrent |
| B. | be colinear |
| C. | 107 dynes |
| D. | be equal in magnitude |
| E. | be concurrent |
| Answer» F. | |
| 36. |
A bob of simple pendulum oscillating in air is made to oscillate in oil. The time period will |
| A. | Increase |
| B. | Decrease |
| C. | Not change |
| D. | Decrease but reduction depends on viscosity of oil |
| E. | None of the above |
| Answer» B. Decrease | |
| 37. |
A stone dropped from a baloon that was ascending at the rate of 30 ft/sec, reaches ground after 10 secs. The height of the baloon where stone was dropped was |
| A. | 3420 ft |
| B. | 107 dynes |
| C. | 4520 ft |
| D. | 2310 ft |
| E. | 1310 ft |
| Answer» F. | |
| 38. |
Using force, length and time as fundamental quantities, the dimensions of mass would be |
| A. | FL-2T+2 |
| B. | FL-1T+2 |
| C. | FL-1T+1 |
| D. | 107 dynes |
| E. | FL-2T+1 |
| Answer» C. FL-1T+1 | |
| 39. |
Instantaneous centre for a rolling wheel on a straight track will be at |
| A. | 107 dynes |
| B. | A |
| C. | B |
| D. | C |
| E. | D |
| Answer» F. | |
| 40. |
A point moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one. The locus of the path traced by the point will be a |
| A. | Cycloid |
| B. | Hyperbola |
| C. | Circle |
| D. | Involute |
| E. | Ellipsc |
| Answer» E. Ellipsc | |
| 41. |
Three forces A, B and C of magnitudes 8 N, 12 N and 20 N acting on a particle are in equilibrim. It can be concluded that |
| A. | 107 dynes |
| B. | B and C act in opposite directions |
| C. | one of the forces in non-coplaner |
| D. | A and B act at 90? |
| E. | one of the forces is non-concurrent |
| Answer» C. one of the forces in non-coplaner | |
| 42. |
The gravitational field at the surface of the moon is one sixth of that at the surface of the earth. A 72 kg man weighs on the surface of the moon |
| A. | 137.7 N |
| B. | 250 |
| C. | 72 N |
| D. | 420 N |
| E. | 117.7 N |
| Answer» F. | |