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. |
A solid spherical ball rolls on a table. The momen' of inertia of the ball is given by 3/5 x mass x radius2. The ratio of translational and rotational kinetic energies for ball will be |
| A. | 2 |
| B. | 7?16 |
| C. | 5?3 |
| D. | 7?8 |
| E. | 1 |
| Answer» D. 7?8 | |
| 2. |
A train moving at 60 kilometers per hour is struck by a bullet moving 1000 m/sec at right angles to the train. The direction with which the bullet appears to strike the train would be |
| A. | 75? |
| B. | 60? |
| C. | 22 |
| D. | 30? |
| E. | 45? |
| Answer» F. | |
| 3. |
When two concurrent and coplaner forces P and Q act at an angle of 180?, their resultant will be a |
| A. | moment equal to PQ |
| B. | couple |
| C. | (P-Q) |
| D. | 107 dynes |
| E. | zero |
| Answer» D. 107 dynes | |
| 4. |
The springs A and B are identical except that A is stiffer than B, that is KA > kB. If both the springs are stretched by the same amount |
| A. | more work will be expended on A than B |
| B. | same work will be expended in both springs. |
| C. | less work will be expended on A than B |
| D. | 107 dynes |
| Answer» B. same work will be expended in both springs. | |
| 5. |
In case forces of 1 N, 2 N, 3 N, 4 N, 5 N and 6 N act in order along the sides of a regular hexagon, the resultant will be |
| A. | 21 N |
| B. | 107 dynes |
| C. | 2 N |
| D. | 6 N |
| Answer» E. | |
| 6. |
The resultant of a force acting on a body will be zero, if the body |
| A. | Rotates with uniform acceleration |
| B. | Moves along a curved path |
| C. | Rotates |
| D. | Does not rotate |
| E. | Rotates with uniform deceleration |
| Answer» E. Rotates with uniform deceleration | |
| 7. |
A particle inside a hollow sphere of internal radius r with coefficient of friction 1/?3 can rest upto height of |
| A. | 0.18 r |
| B. | 0.435 r |
| C. | 0.25 r |
| D. | 0.134 r |
| E. | 0.125 r |
| Answer» E. 0.125 r | |
| 8. |
A sphere of radius r is cut from larger sphere of radius R. The distance between their centre is a. The centroid of the remaining valoume lies on the line of centres and the sistanc from the centre of the larger sphere is |
| A. | ar2 / (R2 - r2) |
| B. | 107 dynes |
| C. | aR/(R2-r2) |
| D. | aR/(R - r) |
| E. | ar3 / (R3 - r3) |
| Answer» F. | |
| 9. |
A 3.2 m diameter balloon is filled with Helium. The total weight of balloon, gas and pay load is 10 kg kg. In an isothermal atmosphere having conditions identical to N.T.P. the balloon will rise to a height of about |
| A. | 6000 m |
| B. | 1500 m |
| C. | 3000 m |
| D. | 2000 m |
| E. | 1000 m |
| Answer» B. 1500 m | |
| 10. |
A block A is dropped down a smooth inclined plane, while another identical block B is released for free fall from the same height |
| A. | block A will have higher velocity than block B while hitting the ground |
| B. | block B will hit the ground earlier. |
| C. | both will hit the ground simultaneously |
| D. | block A will hit the ground earlier |
| E. | 107 dynes |
| Answer» C. both will hit the ground simultaneously | |
| 11. |
The radius of gyration of a solid sphere of radius r is equal to |
| A. | 0.8 r2 |
| B. | 0.2 r2 |
| C. | 0.3 r2 |
| D. | 0.4 r2 |
| E. | 0.5 r2 |
| Answer» E. 0.5 r2 | |
| 12. |
The polar moment of inertia of a hollow circular section whose external diameter is 8 cm and internal diameter of 6 cm will be |
| A. | 137.5 cm4 |
| B. | 107 dynes |
| C. | 275 cm4 |
| D. | 550 cm4 |
| E. | 1100 cm4 |
| Answer» D. 550 cm4 | |
| 13. |
The moment of inertia of a semi-circle of radius r with respect to a centroidal axis parallel to the diameter is |
| A. | 0.33 r2 |
| B. | 0.11 r2 |
| C. | 0.055 r2 |
| D. | 0.05 r2 |
| E. | 0.22 r2 |
| Answer» C. 0.055 r2 | |
| 14. |
The moment of inertia of a solid sphere of radius r is |
| A. | Mr2 |
| B. | 1/8 Mr2 |
| C. | 2/3 Mr2 |
| D. | m4 |
| E. | 1/2 Mr2 |
| Answer» B. 1/8 Mr2 | |
| 15. |
The moment of inertia of a thin ring about an axis perpendicular to plane of ring is |
| A. | 1/3 Mr3 |
| B. | Mr2 |
| C. | Mr |
| D. | Mr3 |
| E. | 1/2 Mr3 |
| Answer» C. Mr | |
| 16. |
Which of the following is an example of a projectile? |
| A. | Launching of a satellite |
| B. | Taking off of an aircraft |
| C. | Lifting of a balloon |
| D. | Throwing of a cricket ball by a player |
| E. | None of the above |
| Answer» E. None of the above | |
| 17. |
The units of moment of inertia are |
| A. | kgm4 |
| B. | kg-m2 |
| C. | kg/m2 |
| D. | kg/m |
| E. | m4 |
| Answer» D. kg/m | |
| 18. |
The moment of inertia of a thin spherical shell is |
| A. | Mr2 |
| B. | 1/2 Mr2 |
| C. | 1/3 Mr2 |
| D. | 2/3 Mr2 |
| E. | None of the above |
| Answer» E. None of the above | |
| 19. |
Which of the following is not a projectile? |
| A. | Bullet coming out of a revolver |
| B. | Arrow released from a bow |
| C. | Lifting of a balloon |
| D. | Throwing a cricket ball from one player to another |
| E. | None of the above |
| Answer» E. None of the above | |
| 20. |
Two identical weights are dropped simultaneously, one on water and the other in glycerine. Which of the following statement is correct? |
| A. | The weight will settle slowly in water but quickly in glycerine |
| B. | The weights will take same time to settle |
| C. | The water level will fall but glycerine level will rise |
| D. | The weight will settle quickly in water but slowly in glycerine |
| E. | 107 dynes |
| Answer» E. 107 dynes | |
| 21. |
The torque acting on a system is zero. Which of the following will be conserved? |
| A. | Angular velocity |
| B. | Linear momentum |
| C. | 107 dynes |
| D. | Angular momentum |
| E. | Moment of inertia |
| Answer» E. Moment of inertia | |
| 22. |
A man wished to move a block of size 3 m x 3 m weighing 80 kg. The coefficient of friction between the block and the ground is 0.27. Which of the following methods should be used? |
| A. | Slide along the ground by pushing |
| B. | Ask for cranes |
| C. | Pull it |
| D. | Tip it over |
| E. | Lift it bodily |
| Answer» E. Lift it bodily | |
| 23. |
Which of the following bearing will have least coefficient of friction |
| A. | Single ball bearing |
| B. | Cylinderical roller bearing |
| C. | Self aligury bearing |
| D. | Thrust ball bearing |
| E. | Tapered bearing |
| Answer» F. | |
| 24. |
For a self locking lifting machine, the efficiency must be |
| A. | 50 percent |
| B. | 100 percent |
| C. | more than 50 percent |
| D. | 107 dynes |
| E. | less than 50 percent |
| Answer» F. | |
| 25. |
A wheel 8 mts in diameter coasts to rest from a speed of 800 rpm in 10 minutes. Its angular deceleration is |
| A. | 308/min2 |
| B. | 683 rad/min2 |
| C. | 502 rad/min2 |
| D. | 107 dynes |
| E. | 809 rad/min2 |
| Answer» D. 107 dynes | |
| 26. |
An electric motor drives a windless which hauls up a crate A of weight W = 500 kg up an inclined plane through a height of 10 m in 2 minutes. The torque acting on the windless is 25 kgm and the drum of the windless makes 30 rpm. The efficiency of the inclined plane would be |
| A. | 41% |
| B. | 61% |
| C. | 26.50% |
| D. | 53.05% |
| E. | 66% |
| Answer» E. 66% | |
| 27. |
The maximum velocity of a body in SHM with amplitude of 150 mm and a frequency 2 vibrations/sec is equal to |
| A. | 1.885 m/sec |
| B. | 0.01885 m/sec |
| C. | 0.1885 m/sec |
| D. | 18.55 m/sec |
| E. | 185.5 m/sec |
| Answer» B. 0.01885 m/sec | |
| 28. |
A train travels between two stations 15 km apart in 18 minutes. If the train accelerates for a part of journey uniformly followed by uniform retardation, the maximum speed attained by the train during the journey will by |
| A. | 125 km/hr |
| B. | 107 dynes |
| C. | 80 km/hr |
| D. | 100 km/hr |
| E. | 60 km/hr |
| Answer» E. 60 km/hr | |
| 29. |
Which of the following pair will have identical dimensions? |
| A. | Pressure and surface tension |
| B. | Work and kinetic energy |
| C. | Momentum and force |
| D. | Moment of inertia and angular momentum |
| E. | None of the above |
| Answer» D. Moment of inertia and angular momentum | |
| 30. |
A train travels between two stations 15 km, apart in 18 minutes. If the train accelerates for a part of journey uniformly followed by uniform relardation, the maximum speed attained by the train, during, the journey, will be |
| A. | 60 km/hr |
| B. | 80 km/hr |
| C. | 125 km/hr |
| D. | 100 km/hr |
| E. | 107 dynes |
| Answer» E. 107 dynes | |
| 31. |
The displacement of a particle under going rectilinear motion along the x-axis is given by x = 2t3 + 21t2 + 60t + 6 metres. |
| A. | 27 m/s2 |
| B. | 18 m/s2 |
| C. | 36 m/s2 |
| D. | 9 m/s2 |
| E. | 107 dynes |
| Answer» E. 107 dynes | |
| 32. |
The dimensions of power are |
| A. | ML2T3 |
| B. | ML2T2 |
| C. | MLT3 |
| D. | ML2T-3 |
| E. | 107 dynes |
| Answer» E. 107 dynes | |
| 33. |
A body is vibrating with simple harmonic motion of aplitude 5 cm frequency 10 vibrations per second. The maximum value of velocity in cm/s will be |
| A. | 3.14 cm/s |
| B. | 314 cm/s |
| C. | 3140 cm/s |
| D. | 31.4 cm/s |
| E. | 31400 cm/s |
| Answer» C. 3140 cm/s | |
| 34. |
The necessary condition for the forces acting on a body to be in equilibrium is that these should be |
| A. | In the same direction |
| B. | Coplaner |
| C. | Similar in nature |
| D. | Should not meet at a point |
| E. | (B) and (D) above |
| Answer» F. | |
| 35. |
The dimensions of modulus of elasticity are |
| A. | MLT-2 |
| B. | 107 dynes |
| C. | MLT-1 |
| D. | ML-2T-1 |
| E. | ML-1T-2 |
| Answer» F. | |
| 36. |
A rigid body is in equilibrium under the action of these forces when |
| A. | These forces are equal |
| B. | The lines of action of these forces are parallel |
| C. | The lines of action of these forces meet in a point |
| D. | (A) and (B) above |
| E. | (B) and (C) above |
| Answer» F. | |
| 37. |
A rigid body is suspended vertically at a point and oscillates with a small amplitude under the action of the force of gravity. Such an arrangement is called |
| A. | Simple pendulum |
| B. | Rigid pendulum |
| C. | Second's pendulum |
| D. | Compound pendulum |
| E. | Newton's pendulum |
| Answer» E. Newton's pendulum | |
| 38. |
A man is standing near the edge of a uniformly rotating platform about an axis passing through its centre. The speed of rotation of the platform will decrease if he |
| A. | extends his arms outwards |
| B. | moves towards the axis of rotation |
| C. | jumps out from the platform |
| D. | accepts a heavy bag from one of his friends standing near by and holds it in his hand |
| E. | 107 dynes |
| Answer» E. 107 dynes | |
| 39. |
A particle in simple Harmonic Motion while passing through mean position will have |
| A. | Maximum kinetic energy and minimum potential energy |
| B. | Average kinetic energy and average potential energy |
| C. | Minimum kinetic energy and maximum potential energy |
| D. | Maximum kinetic energy and maximum |
| E. | Minimum kinetic energy and minimum potential energy |
| Answer» B. Average kinetic energy and average potential energy | |
| 40. |
A particle in SHM while passing through mean position will have |
| A. | maximum kinetic energy and maximum potential energy |
| B. | 107 dynes |
| C. | maximum kinetic energy and minimum potential energy |
| D. | average kinetic energy and average potential energy. |
| E. | minimum kinetic energy and maximum potential energy |
| Answer» D. average kinetic energy and average potential energy. | |
| 41. |
A body is executing simple harmonic motion of amplitude 1 cm. Its velocitywhile passing through the central point is 10 mm/sec. Its frequency will be |
| A. | 2.99 rps |
| B. | 2.22 rps |
| C. | 1 rps |
| D. | 1.59 rps |
| E. | 1.77 rps |
| Answer» D. 1.59 rps | |
| 42. |
Moment of Inertia of triangular section about an axis passing through its base is given by |
| A. | bh3/12 |
| B. | bh3/32 |
| C. | bh3/36 |
| D. | None of the above |
| E. | Tapered bearing |
| Answer» B. bh3/32 | |
| 43. |
A man is standing ner the edge of a uniformly rotating platform about an axis passing through its centre. The speed of rotation of the platorm will decrease if he |
| A. | extends his arms outwards |
| B. | 107 dynes |
| C. | moves towards the axis of rotation |
| D. | jumps out from that platform |
| E. | take out his coat and throws away |
| Answer» B. 107 dynes | |
| 44. |
The moment of inertia of a hollow circular section whose external diameter is 8 cm and interial diameter is 6 cm about the axis passing through its centre is |
| A. | 66.8 cm4 |
| B. | 137.5 cm4 |
| C. | 550 cm4 |
| D. | 33.4 cm4 |
| E. | 275 cm4 |
| Answer» C. 550 cm4 | |
| 45. |
A piece of wetted wood just floats in water. When placed in an oil of specific gravity 0.75, it will |
| A. | Float with upside down |
| B. | Sink |
| C. | Float for sometime and then sink |
| D. | Float with 3/4 of volume above the liquid surface |
| E. | Float with 1/4 of volume above the liquid level |
| Answer» C. Float for sometime and then sink | |
| 46. |
A dash pot consists of a cylinder 10 cm in diameter in which slides a piston 12 cm long having a radial clearance of 1 mm. The cylinder is filled with oil having a viscosity of 1 poise. What will be the resistance offered by the piston to sliding with a velocity of 3 cm/sec |
| A. | 1090 kg |
| B. | 100 kg |
| C. | 10900 kg |
| D. | 10 kg |
| E. | 50 kg |
| Answer» D. 10 kg | |
| 47. |
The periodic time of a body moving in Simple Harmonic Motion is |
| A. | Directly proportional to its angular velocity |
| B. | Directly proportional to the weight of the body |
| C. | Inversely proportional to the square of angular velocity |
| D. | Directly proportional to the momentum of swinging body |
| E. | Inversely proportional to the angular velocity |
| Answer» F. | |
| 48. |
A particle is moving in Simple Harmonic Motion in a simple pendulum with some period of oscillation. Now in order to double the period of oscillation |
| A. | The length of pendulum should be quadrupled |
| B. | The length of pendulum should be doubled |
| C. | The mass of the bob should be halved |
| D. | The length of pendulum should be reduced to one fourth |
| E. | The mass of the bob should be doubled |
| Answer» B. The length of pendulum should be doubled | |
| 49. |
A clock with a second pendulum is gaining 5 minutes a day. To correct it |
| A. | The eccentricity of bob with pendulum should be decreased |
| B. | The length of the pendulum should be decreased |
| C. | The length of pendulum should not be changed |
| D. | The length of the pendulum should be increased |
| E. | The eccentricity of bon with pendulum should be increased |
| Answer» E. The eccentricity of bon with pendulum should be increased | |
| 50. |
According to Kepler's law of motion the square of the time period T of a planet around the sun is proportional to the |
| A. | mean distance |
| B. | square of the mean distance of planet from sun |
| C. | cube of the mean distance of planet from sun |
| D. | 107 dynes |
| E. | 3/2 power of the mean distance |
| Answer» D. 107 dynes | |