MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 606 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 501. |
A framed structure is perfect, if the number of members are __________ (2j - 3), where j is the number of joints.$? |
| A. | Equal to |
| B. | Less than |
| C. | Greater than |
| D. | None of these |
| Answer» B. Less than | |
| 502. |
Two coplanar couples having equal and opposite moments? |
| A. | Balance each other |
| B. | Produce a couple and an unbalanced force |
| C. | Are equivalent |
| D. | Cannot balance each other |
| Answer» E. | |
| 503. |
On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be? |
| A. | Downwards at its upper end |
| B. | Upwards at its upper end |
| C. | Perpendicular to the wall at its upper end |
| D. | Zero at its upper end |
| Answer» E. | |
| 504. |
A force is completely defined when we specify? |
| A. | Magnitude |
| B. | Direction |
| C. | Point of application |
| D. | All of the above |
| Answer» E. | |
| 505. |
Joule is the unit of? |
| A. | Force |
| B. | Work |
| C. | Power |
| D. | Velocity |
| Answer» C. Power | |
| 506. |
Moment of inertia of a triangular section of base (b) and height (h) about an axis passing through its C.G. and parallel to the base, is? |
| A. | bh3/4 |
| B. | bh3/8 |
| C. | bh3/12 |
| D. | bh3/36 |
| Answer» E. | |
| 507. |
When the lift is moving upwards with some acceleration, the pressure exerted by a man is __________ to its acceleration.? |
| A. | Directly proportional |
| B. | Inversely proportional |
| C. | Cube root |
| D. | None of these |
| Answer» B. Inversely proportional | |
| 508. |
A framed structure is perfect, if the number of members are __________ (2j - 3), where j is the number of joints.? |
| A. | Equal to |
| B. | Less than |
| C. | Greater than |
| D. | None of these |
| Answer» B. Less than | |
| 509. |
The moment of inertia of a thin spherical shell of mass m and radius r, about its diameter is? |
| A. | mr²/3 |
| B. | 2mr²/3 |
| C. | 2mr²/5 |
| D. | 3mr²/5 |
| Answer» C. 2mr¬¨‚â§/5 | |
| 510. |
In a framed structure, as shown in the below figure, the force in the member BC is? |
| A. | W/‚à ö3 (compression) |
| B. | W/‚à ö3 (tension) |
| C. | 2W/‚à ö3 (compression) |
| D. | 2W/‚à ö3 (tension) |
| Answer» E. | |
| 511. |
The centre of gravity of an isosceles triangle with base (p) and sides (q) from its base is? |
| A. | [‚à ö(4p¬≤ - q¬≤)]/6 |
| B. | (4p² - q²)/6 |
| C. | (p² - q²)/4 |
| D. | (p² + q²)/4 |
| Answer» B. (4p¬¨‚⧠- q¬¨‚â§)/6 | |
| 512. |
The matter contained in a body, is called? |
| A. | Impulsive force |
| B. | Mass |
| C. | Weight |
| D. | Momentum |
| Answer» C. Weight | |
| 513. |
The acceleration of a particle moving with simple harmonic motion is __________ at the mean position.? |
| A. | Zero |
| B. | Minimum |
| C. | Maximum |
| D. | None of these |
| Answer» B. Minimum | |
| 514. |
A semicircular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi circular disc and horizontal surface is µ. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will? |
| A. | Remain horizontal |
| B. | Slant up towards direction of pull |
| C. | Slant down towards direction of pull |
| D. | None of the above |
| Answer» D. None of the above | |
| 515. |
Forces are called concurrent when their lines of action meet in? |
| A. | One point |
| B. | Two points |
| C. | Plane |
| D. | Perpendicular planes |
| Answer» B. Two points | |
| 516. |
If a number of forces act simultaneously on a particle, it is possible? |
| A. | Not a replace them by a single force |
| B. | To replace them by a single force |
| C. | To replace them by a single force through C.G. |
| D. | To replace them by a couple |
| Answer» C. To replace them by a single force through C.G. | |
| 517. |
One joule means that? |
| A. | Work is done by a force of 1 N when it displaces a body through 1 m |
| B. | Work is done by a force of 1 kg when it displaces a body through 1 m |
| C. | Work is done by a force of 1 dyne when it displaces a body through 1 cm |
| D. | Work is done by a force of 1 g when it displaces a body through 1 cm |
| Answer» B. Work is done by a force of 1 kg when it displaces a body through 1 m | |
| 518. |
Which of the following is not the unit of distance?? |
| A. | Angstrom |
| B. | Light year |
| C. | Micron |
| D. | Milestone |
| Answer» E. | |
| 519. |
When a body falls freely under gravitational force, it possesses __________ weight.? |
| A. | No |
| B. | Minimum |
| C. | Maximum |
| D. | None of these |
| Answer» B. Minimum | |
| 520. |
Which one of the following statements is not correct?? |
| A. | The tangent of the angle of friction is equal to coefficient of friction |
| B. | The angle of repose is equal to angle of friction |
| C. | The tangent of the angle of repose is equal to coefficient of friction |
| D. | The sine of the angle of repose is equal to coefficient to friction |
| Answer» E. | |
| 521. |
The skidding away of the vehicle on a level circular path can be avoided if the force of friction between the wheels and the ground is __________ the centrifugal force.? |
| A. | Less than |
| B. | Greater than |
| C. | Equal to |
| D. | None of these |
| Answer» C. Equal to | |
| 522. |
The friction experienced by a body, when at rest, is known as? |
| A. | Static friction |
| B. | Dynamic friction |
| C. | Limiting friction |
| D. | Coefficient of friction |
| Answer» B. Dynamic friction | |
| 523. |
The time of flight of a projectile on downward inclined plane depends upon? |
| A. | Angle of projection |
| B. | Angle of inclination of the plane |
| C. | Both (A) and (B) |
| D. | None of these |
| Answer» D. None of these | |
| 524. |
A force while acting on a body may? |
| A. | Change its motion |
| B. | Balance the forces, already acting on it |
| C. | Give rise to the internal stresses in it |
| D. | All of these |
| Answer» E. | |
| 525. |
The force induced in the string AB due to the load W, as shown in the below figure is? |
| A. | W sinθ |
| B. | W cosθ |
| C. | W secθ |
| D. | W cosecθ |
| Answer» E. | |
| 526. |
One end of a helical spring is fixed while the other end carries the load W which moves with simple harmonic motion. The frequency of motion is given by (where δ = Deflection of the spring.)? |
| A. | 2œÄ. ‚à ö(g/Œ¥) |
| B. | 1/2œÄ. ‚à ö(g/Œ¥) |
| C. | 2œÄ. ‚à ö(Œ¥/g) |
| D. | 1/2œÄ. ‚à ö(Œ¥/g) |
| Answer» C. 2≈ì√Ñ. ‚Äö√ √∂(≈í¬•/g) | |
| 527. |
A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act? |
| A. | Downward at its upper end |
| B. | Upward at its upper end |
| C. | Zero at its upper end |
| D. | Perpendicular to the wall at its upper end |
| Answer» D. Perpendicular to the wall at its upper end | |
| 528. |
Which of the following are vector quantities?? |
| A. | Linear displacement |
| B. | Linear velocity |
| C. | Linear acceleration |
| D. | All of these |
| Answer» E. | |
| 529. |
The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is known as? |
| A. | Principle of independence of forces |
| B. | Principle of resolution of forces |
| C. | Principle of transmissibility of forces |
| D. | None of these |
| Answer» C. Principle of transmissibility of forces | |
| 530. |
The frequency of oscillation of a compound pendulum is (where kG = Radius of gyration about the centroidal axis, and h = Distance between the point of suspension and C.G. of the body.)? |
| A. | 2œÄ. ‚à ö(gh/kG¬≤ + h¬≤) |
| B. | 2œÄ. ‚à ö(kG¬≤ + h¬≤/gh) |
| C. | 1/2œÄ. ‚à ö(gh/kG¬≤ + h¬≤) |
| D. | 1/2œÄ. ‚à ö(kG¬≤ + h¬≤/gh) |
| Answer» D. 1/2≈ì√Ñ. ‚Äö√ √∂(kG¬¨‚⧠+ h¬¨‚â§/gh) | |
| 531. |
A heavy string attached at two ends at same horizontal level and when central dip is very small approaches the following curve? |
| A. | Circular arc |
| B. | Parabola |
| C. | Hyperbola |
| D. | Elliptical |
| Answer» C. Hyperbola | |
| 532. |
A circular hole of 50 mm diameter is cut out from a circular disc of 100 mm diameter as shown in the below figure. The center of gravity of the section will lie? |
| A. | In the shaded area |
| B. | In the hole |
| C. | At ‘O’ |
| D. | None of these |
| Answer» B. In the hole | |
| 533. |
A particle inside a hollow sphere of radius r, having coefficient of friction µ can rest up to height of? |
| A. | r/2 |
| B. | r/A |
| C. | r/3 |
| D. | 0.134 r |
| Answer» E. | |
| 534. |
The rate of change of displacement of a body is called? |
| A. | Velocity |
| B. | Acceleration |
| C. | Momentum |
| D. | None of these |
| Answer» B. Acceleration | |
| 535. |
Which is the correct statement about law of polygon of forces?? |
| A. | If any number of forces acting at a point can be represented by the sides of a polygon taken in order, then the forces are in equilibrium |
| B. | If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium |
| C. | If a polygon representing forces acting at a point is closed then forces are in equilibrium |
| D. | If any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium |
| Answer» E. | |
| 536. |
Which of the following is a scalar quantity?? |
| A. | Force |
| B. | Speed |
| C. | Velocity |
| D. | Acceleration |
| Answer» C. Velocity | |
| 537. |
A lead ball with a certain velocity is made to strike a wall, it falls down, but rubber ball of same mass and with same velocity strikes the same wall, it rebounds. Select the correct reason from the following:? |
| A. | Both the balls undergo an equal change in momentum |
| B. | The change in momentum suffered by rubber ball is more than the lead ball |
| C. | The change in momentum suffered by rubber ball is less than the lead ball |
| D. | None of the above |
| Answer» C. The change in momentum suffered by rubber ball is less than the lead ball | |
| 538. |
The minimum force required to slide a body of weight 'W' on a rough horizontal plane is? |
| A. | W sinθ |
| B. | W cosθ |
| C. | W tanθ |
| D. | None of these |
| Answer» D. None of these | |
| 539. |
Frictional force encountered after commencement of motion is called? |
| A. | Limiting friction |
| B. | Kinematic friction |
| C. | Frictional resistance |
| D. | Dynamic friction |
| Answer» E. | |
| 540. |
The periodic time (T) is given by (where, ω = Angular velocity of particle in rad/s.)? |
| A. | ω/2π |
| B. | 2π/ω |
| C. | 2π × ω |
| D. | π/ω |
| Answer» C. 2≈ì√Ñ ‚àö√≥ ≈ì√¢ | |
| 541. |
The angle of inclination of the plane at which the body begins to move down the plane, is called? |
| A. | Angle of friction |
| B. | Angle of repose |
| C. | Angle of projection |
| D. | None of these |
| Answer» B. Angle of repose | |
| 542. |
The possible loading in various members of framed structures are? |
| A. | Compression or tension |
| B. | Buckling or shear |
| C. | Shear or tension |
| D. | All of the above |
| Answer» B. Buckling or shear | |
| 543. |
The time of flight (t) of a projectile on a horizontal plane is given by? |
| A. | t = 2u. sinα/g |
| B. | t = 2u. cosα/g |
| C. | t = 2u. tanα/g |
| D. | t = 2u/g.sinα |
| Answer» B. t = 2u. cos≈í¬±/g | |
| 544. |
In determining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than? |
| A. | Two members with unknown forces of the frame |
| B. | Three members with unknown forces of the frame |
| C. | Four members with unknown forces of the frame |
| D. | Three members with known forces of the frame |
| Answer» C. Four members with unknown forces of the frame | |
| 545. |
The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of |
| A. | Friction |
| B. | Limiting friction |
| C. | Repose |
| D. | Kinematic friction |
| Answer» D. Kinematic friction | |
| 546. |
Concurrent forces are those forces whose lines of action |
| A. | Lie on the same line |
| B. | Meet at one point |
| C. | Meet on the same plane |
| D. | None of these |
| Answer» C. Meet on the same plane | |
| 547. |
The moment of inertia of a solid cone of mass ‘m’ and base radius ‘r’ about its vertical axis is$ |
| A. | 3mr²/5 |
| B. | 3mr²/10 |
| C. | 2mr²/5 |
| D. | 4mr²/5 |
| Answer» C. 2mr¬¨‚â§/5 | |
| 548. |
The center of gravity of a quadrant of a circle lies along its central radius (r) at a distance of |
| A. | 0.5 r |
| B. | 0.6 r |
| C. | 0.7 r |
| D. | 0.8 r |
| Answer» C. 0.7 r | |
| 549. |
If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be |
| A. | Maximum |
| B. | Minimum |
| C. | Zero |
| D. | Infinity |
| Answer» D. Infinity | |
| 550. |
For a self locking machine, the efficiency must be |
| A. | Equal to 50% |
| B. | Less than 50% |
| C. | Greater than 50% |
| D. | 100% |
| Answer» C. Greater than 50% | |