MCQOPTIONS
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MCQOPTIONS
This section includes 977 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 551. |
*/*_When there is a reduction in amplitude over every cycle of vibration, then the body is said to have? |
| A. | Free vibration |
| B. | Forced vibration |
| C. | Damped vibration |
| D. | Under damped vibration |
| Answer» D. Under damped vibration | |
| 552. |
*/*_The instantaneous center of a rigid thin disc rolling on a plane rigid surface is located at? |
| A. | The center of the disc |
| B. | The point of contact |
| C. | An infinite distance on the plane surface |
| D. | The point on the circumference situated vertically opposite to the contact point |
| Answer» C. An infinite distance on the plane surface | |
| 553. |
*/*_Effort of a governor is the? |
| A. | Mean force exerted at the sleeve for a given percentage change of speed |
| B. | Work-done at the sleeve for maximum equilibrium speed |
| C. | Mean force exerted at the sleeve for maximum equilibrium speed |
| D. | None of the above |
| Answer» B. Work-done at the sleeve for maximum equilibrium speed | |
| 554. |
*/*_A rotary internal combustion engine has __________ cylinders.? |
| A. | Four |
| B. | Five |
| C. | Six |
| D. | Seven |
| Answer» E. | |
| 555. |
*/*_The example of completely constrained motion is a? |
| A. | Motion of a piston in the cylinder of a steam engine |
| B. | Motion of a square bar in a square hole |
| C. | Motion of a shaft with collars at each end in a circular hole |
| D. | All of the above |
| Answer» E. | |
| 556. |
*/*_In a four bar chain or quadric cycle chain? |
| A. | Each of the four pairs is a turning pair |
| B. | One is a turning pair and three are sliding pairs |
| C. | Two are turning pairs and two are sliding pairs |
| D. | Three are turning pairs and one is a sliding pair |
| Answer» B. One is a turning pair and three are sliding pairs | |
| 557. |
*/*_When a point moves along a straight line, its acceleration will have? |
| A. | Radial component only |
| B. | Tangential component only |
| C. | Coriolis component only |
| D. | Radial and tangential components both |
| Answer» C. Coriolis component only | |
| 558. |
*/*_Which gear is used for connecting two coplanar and intersecting shafts?? |
| A. | Spur gear |
| B. | Helical gear |
| C. | Bevel gear |
| D. | None of the above |
| Answer» D. None of the above | |
| 559. |
*/*_The example of rolling pair is? |
| A. | Bolt and nut |
| B. | Lead screw of a lathe |
| C. | Ball and socket joint |
| D. | Ball bearing and roller bearing |
| Answer» E. | |
| 560. |
*/*_The method of direct and reverse cranks is used in engines for? |
| A. | The control of speed fluctuations |
| B. | Balancing of forces and couples |
| C. | Kinematic analysis |
| D. | Vibration analysis |
| Answer» C. Kinematic analysis | |
| 561. |
*/*_In higher pair, the relative motion is? |
| A. | Purely turning |
| B. | Purely sliding |
| C. | Purely rotary |
| D. | Combination of sliding and turning |
| Answer» E. | |
| 562. |
*/*_The type of pair formed by two elements which are so connected that one is constrained to turn or revolve about a fixed axis of another element is known as? |
| A. | Turning pair |
| B. | Rolling pair |
| C. | Sliding pair |
| D. | Spherical pair |
| Answer» B. Rolling pair | |
| 563. |
*/*_In order to give a complete secondary balance of a multi-cylinder inline engine,? |
| A. | The algebraic sum of the secondary forces must be equal to zero |
| B. | The algebraic sum of the couples about any point in the plane of the secondary forces must be equal to zero |
| C. | Both (A) and (B) |
| D. | None of these |
| Answer» D. None of these | |
| 564. |
%_Module of a gear is_% |
| A. | D/T |
| B. | T/D |
| C. | 2D/T |
| D. | 2T/D |
| Answer» B. T/D | |
| 565. |
%_The example of completely constrained motion is a_% |
| A. | Motion of a piston in the cylinder of a steam engine |
| B. | Motion of a square bar in a square hole |
| C. | Motion of a shaft with collars at each end in a circular hole |
| D. | All of the above |
| Answer» E. | |
| 566. |
%_A rotary internal combustion engine has __________ cylinders._% |
| A. | Four |
| B. | Five |
| C. | Six |
| D. | Seven |
| Answer» E. | |
| 567. |
%_The instantaneous center of a rigid thin disc rolling on a plane rigid surface is located at_% |
| A. | The center of the disc |
| B. | The point of contact |
| C. | An infinite distance on the plane surface |
| D. | The point on the circumference situated vertically opposite to the contact point |
| Answer» C. An infinite distance on the plane surface | |
| 568. |
%_Effort of a governor is the_% |
| A. | Mean force exerted at the sleeve for a given percentage change of speed |
| B. | Work-done at the sleeve for maximum equilibrium speed |
| C. | Mean force exerted at the sleeve for maximum equilibrium speed |
| D. | None of the above |
| Answer» B. Work-done at the sleeve for maximum equilibrium speed | |
| 569. |
%_In a four bar chain or quadric cycle chain_% |
| A. | Each of the four pairs is a turning pair |
| B. | One is a turning pair and three are sliding pairs |
| C. | Two are turning pairs and two are sliding pairs |
| D. | Three are turning pairs and one is a sliding pair |
| Answer» B. One is a turning pair and three are sliding pairs | |
| 570. |
%_The unbalanced primary forces in a reciprocating engine are_% |
| A. | Balanced completely |
| B. | Balanced partially |
| C. | Balanced by secondary forces |
| D. | Not balanced |
| Answer» C. Balanced by secondary forces | |
| 571. |
%_A governor is said to be stable, if the_% |
| A. | Radius of rotation of balls increases as the equilibrium speed decreases |
| B. | Radius of rotation of balls decreases as the equilibrium speed decreases |
| C. | Radius of rotation of balls increases as the equilibrium speed increases |
| D. | Radius of rotation of balls decreases as the equilibrium speed increases |
| Answer» D. Radius of rotation of balls decreases as the equilibrium speed increases | |
| 572. |
%_In a ball bearing, ball and bearing forms a_% |
| A. | Turning pair |
| B. | Rolling pair |
| C. | Screw pair |
| D. | Spherical pair |
| Answer» C. Screw pair | |
| 573. |
%_A spring controlled governor is said to be unstable when the controlling force_% |
| A. | Increases as the radius of rotation decreases |
| B. | Increases as the radius of rotation increases |
| C. | Decreases as the radius of rotation increases |
| D. | Remains constant for all radii of rotation |
| Answer» D. Remains constant for all radii of rotation | |
| 574. |
%_A slider crank chain consists of following numbers of turning and sliding pairs_% |
| A. | 1, 3 |
| B. | 2, 2 |
| C. | 3, 1 |
| D. | 4, 0 |
| Answer» D. 4, 0 | |
| 575. |
%_A rigid body, under the action of external forces, can be replaced by two masses placed at a fixed distance apart. The two masses form an equivalent dynamical system, if_% |
| A. | The sum of the two masses is equal to the total mass of body |
| B. | The center of gravity of the two masses coincides with that of the body |
| C. | The sum of mass moment of inertia of the masses about their center of gravity is equal to the mass moment of inertia of the body |
| D. | All of the above |
| Answer» E. | |
| 576. |
%_Which is the false statement about the properties of instantaneous center?_% |
| A. | At the instantaneous center of rotation, one rigid link rotates instantaneously relative to another for the configuration of mechanism considered |
| B. | The two rigid links have no linear velocities relative to each other at the instantaneous center |
| C. | The two rigid links which have no linear velocity relative to each other at this center have the same linear velocity to the third rigid link |
| D. | The double center can be denoted either by O2 or O12, but proper selection should be made |
| Answer» E. | |
| 577. |
%_Efficiency of a screw jack is given by_% |
| A. | tan (α + φ)/tanα |
| B. | tanα/tan (α +φ) |
| C. | tan (α - φ)/tanα |
| D. | tanα/tan (α - φ) |
| Answer» C. tan (≈í¬± - ≈ì√ú)/tan≈í¬± | |
| 578. |
%_The motion of a shaft in a circular hole is an example of_% |
| A. | Completely constrained motion |
| B. | Incompletely constrained motion |
| C. | Successfully constrained motion |
| D. | None of these |
| Answer» C. Successfully constrained motion | |
| 579. |
%_The D-slide valve is also known as_% |
| A. | Inside admission valve |
| B. | Outside admission valve |
| C. | Piston slide valve |
| D. | None of these |
| Answer» C. Piston slide valve | |
| 580. |
%_The example of lower pair is_% |
| A. | Shaft revolving in a bearing |
| B. | Straight line motion mechanisms |
| C. | Automobile steering gear |
| D. | All of the above |
| Answer» E. | |
| 581. |
%_The equation of motion for a single degree of freedom system with viscous damping is 4(dx²/dt²) + 9(dx/dt) + 16x. The damping ratio of the system is_% |
| A. | 9/8 |
| B. | 9/82 |
| C. | 9/16 |
| D. | 9/128 |
| Answer» D. 9/128 | |
| 582. |
%_Which of the following statement is correct as regard to the difference between a machine and a structure?_% |
| A. | The parts of a machine move relative to one another, whereas the members of a structure do not move relative to one another |
| B. | The links of a machine may transmit both power and motion, whereas the members of a structure transmit forces only |
| C. | A machine transforms the available energy into some useful work, whereas in a structure no energy is transformed into useful work |
| D. | All of the above |
| Answer» E. | |
| 583. |
%_When a rigid body is suspended vertically and it oscillates with a small amplitude under the action of the force of gravity, the body is known as_% |
| A. | Simple pendulum |
| B. | Compound pendulum |
| C. | Torsional pendulum |
| D. | Second's pendulum |
| Answer» C. Torsional pendulum | |
| 584. |
%_A circle passing through the pitch point with its center at the center of cam axis is known as_% |
| A. | Pitch circle |
| B. | Base circle |
| C. | Prime circle |
| D. | Outer circle |
| Answer» D. Outer circle | |
| 585. |
%_For simple harmonic motion of the of follower, a cosine curve represents_% |
| A. | Displacement diagram |
| B. | Velocity diagram |
| C. | Acceleration diagram |
| D. | All of the above |
| Answer» D. All of the above | |
| 586. |
%_The acceleration of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by_% |
| A. | ω². (r₁ r₂). (1 - cos² θ) |
| B. | ω². (r₁ + r₂). (1 + cos² θ) |
| C. | ω². (r₁ + r₂). [(2 - cos² θ)/cos³ θ] |
| D. | ω². (r₁ - r₂). (1 - sin² θ) |
| Answer» D. ≈ì√¢¬¨‚â§. (r‚Äö√á√Ö - r‚Äö√á√á). (1 - sin¬¨‚⧠≈í‚àè) | |
| 587. |
%_Ackermann steering gear consists of_% |
| A. | Sliding pairs |
| B. | Turning pairs |
| C. | Rolling pairs |
| D. | Higher pairs |
| Answer» C. Rolling pairs | |
| 588. |
%_The driving and driven shafts connected by a Hooke's joint will have equal speeds, if_% |
| A. | cosθ = sinα |
| B. | sinθ = ± tanα |
| C. | tanθ = ± cosα |
| D. | cotθ = cosα |
| Answer» D. cot≈í‚àè = cos≈í¬± | |
| 589. |
%_Governor is used in automobile to_% |
| A. | Decrease the variation of speed |
| B. | Maximize the fuel economy |
| C. | Limit the vehicle speed |
| D. | Maintain constant engine speed |
| Answer» D. Maintain constant engine speed | |
| 590. |
_ Oldham's coupling is the$? |
| A. | Second inversion of double slider crank chain |
| B. | Third inversion of double slider crank chain |
| C. | Second inversion of single slider crank chain |
| D. | Third inversion of slider crank chain |
| Answer» C. Second inversion of single slider crank chain | |
| 591. |
_ If ‘D₁’ and ‘D₂’ be the diameters of driver and driven pulleys, then belt speed is proportional to$? |
| A. | D‚ÇÅ/D‚ÇÇ |
| B. | D‚ÇÇ/D‚ÇÅ |
| C. | D‚ÇÅ.D‚ÇÇ |
| D. | D‚ÇÅ |
| Answer» E. | |
| 592. |
_ Typewriter constitutes$? |
| A. | Machine |
| B. | Structure |
| C. | Mechanism |
| D. | Inversion |
| Answer» D. Inversion | |
| 593. |
_ In order to facilitate starting of locomotive in any position, the cranks of a locomotive with two cylinders, are placed at$? |
| A. | 45° to each other |
| B. | 90° to each other |
| C. | 120° to each other |
| D. | 180° to each other |
| Answer» C. 120¬¨‚àû to each other | |
| 594. |
_ Peaucellier’s mechanism has$? |
| A. | Eight links |
| B. | Six links |
| C. | Four links |
| D. | Twelve links |
| Answer» B. Six links | |
| 595. |
_ In a differential band brake as shown in the below figure, the drum rotates anticlockwise and the greater tension T‚ÇÅ acts at A and smaller tension T‚ÇÇ at B. Length OA is greater than length OB. In order to apply the brake, the force P at C should$? |
| A. | Be zero |
| B. | Act in upward direction |
| C. | Act in downward direction |
| D. | None of the above |
| Answer» D. None of the above | |
| 596. |
_ The frequency of oscillation of a compound pendulum is$? |
| A. | 2œÄ. ‚à ö[gh/(kG¬≤ + h¬≤)] |
| B. | 2œÄ. ‚à ö[(kG¬≤ + h¬≤)/gh] |
| C. | (1/2œÄ). ‚à ö[gh/(kG¬≤ + h¬≤)] |
| D. | (1/2œÄ). ‚à ö[(kG¬≤ + h¬≤)/gh] |
| Answer» D. (1/2≈ì√Ñ). ‚Äö√ √∂[(kG¬¨‚⧠+ h¬¨‚â§)/gh] | |
| 597. |
_ Which of the following statement is correct for involute gears?$? |
| A. | The interference is inherently absent. |
| B. | The variation in centre distance of shafts increases radial force. |
| C. | A convex flank is always in contact with concave flank. |
| D. | The pressure angle is constant throughout the teeth engagement. |
| Answer» E. | |
| 598. |
_ The critical speed of a shaft in revolution per second is __________ as that of natural frequency of transverse vibration.$? |
| A. | Same |
| B. | Different |
| C. | Unpredictable |
| D. | None of these |
| Answer» B. Different | |
| 599. |
_ The stress induced in a body will be shear stress, when it is subjected to$? |
| A. | Longitudinal vibrations |
| B. | Transverse vibrations |
| C. | Torsional vibrations |
| D. | None of these |
| Answer» D. None of these | |
| 600. |
_ If there are L number of links in a mechanism, then number of possible inversions is equal to$? |
| A. | L + 1 |
| B. | L - 1 |
| C. | L |
| D. | L + 2 |
| Answer» D. L + 2 | |