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MCQOPTIONS
This section includes 4791 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 3951. |
The unbalanced force due to revolving masses |
| A. | varies in magnitude but constant in direction |
| B. | varies in direction but constant in magnitude |
| C. | varies in magnitude and direction both |
| D. | constant in magnitude and direction both |
| Answer» C. varies in magnitude and direction both | |
| 3952. |
The power of a Porter governor is equal to |
| A. | <img src="/_files/images/mechanical-engineering/theory-of-machines/504-362-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/theory-of-machines/504-362-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/theory-of-machines/504-362-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/theory-of-machines/504-362-4.png"> |
| Answer» E. | |
| 3953. |
The effect of swaying couple in a locomotive is resisted by the side pressure between the flanges of the tyres of the wheel and the inside of the rails. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 3954. |
The Klein's diagram is useful to find |
| A. | displacement of various parts |
| B. | velocity of various parts |
| C. | acceleration of various parts |
| D. | angular acceleration of various parts |
| Answer» D. angular acceleration of various parts | |
| 3955. |
The equation of motion for a single degree of freedom system with viscous damping is . The damping ratio of the system is |
| A. | 9/8 |
| B. | 9/8 |
| C. | <span class="root">2</span> |
| D. | 9/16 |
| E. | 9/128 |
| Answer» D. 9/16 | |
| 3956. |
The mechanism in which two are turning pairs and two are sliding pairs, is called a |
| A. | double slider crank chain |
| B. | elliptical trammel |
| C. | Scotch yoke mechanism |
| D. | all of these |
| Answer» E. | |
| 3957. |
In a multiple V-belt drive, all the belts should stretch at the same rate. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 3958. |
In a reciprocating engine, usually __________ of the reciprocating masses are balanced. |
| A. | one-half |
| B. | two-third |
| C. | three-fourth |
| D. | whole |
| Answer» C. three-fourth | |
| 3959. |
Which of the following is a spring controlled governor? |
| A. | Hartnell governor |
| B. | Hartung governor |
| C. | Wilson-Hartnell governor |
| D. | all of these |
| Answer» E. | |
| 3960. |
The engine of an aeroplane rotates in clockwise direction when seen from the tail end and the aeroplane takes a turn to the right. The effect of gyroscopic couple on the aeroplane will be to dip the nose and raise the tail. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 3961. |
At the nodal point in a shaft, the amplitude for torsional vibration will be |
| A. | minimum |
| B. | maximum |
| C. | zero |
| D. | infinity |
| Answer» D. infinity | |
| 3962. |
When a body is subjected to transverse vibrations, the stress induced in a body will be |
| A. | shear stress |
| B. | bending stress |
| C. | tensile stress |
| D. | compressive, stress |
| Answer» C. tensile stress | |
| 3963. |
Which of the following statement is correct for gears ? |
| A. | The addendum is less than the dedendum |
| B. | The pitch circle diameter is the product of module and number of teeth |
| C. | The contact ratio means the number of pairs of teeth in contact |
| D. | all of the above |
| Answer» E. | |
| 3964. |
The minimum number of teeth on the pinion which will mesh with any gear without interference for 20 full depth involute teeth will be |
| A. | 12 |
| B. | 14 |
| C. | 18 |
| D. | 24 |
| Answer» D. 24 | |
| 3965. |
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 to each other | |
| 3966. |
The coriolis component of acceleration leads the sliding velocity by |
| A. | 45 |
| B. | 90 |
| C. | 135 |
| D. | 180 |
| Answer» C. 135 | |
| 3967. |
In a mechanism, the fixed instantaneous centres are those centres which |
| A. | remain in the same place for all configurations of the mechanism |
| B. | vary with the configuration of the mechanism |
| C. | moves as the mechanism moves, but joints are of permanent nature |
| D. | none of the above |
| Answer» B. vary with the configuration of the mechanism | |
| 3968. |
Which of the following statements regarding laws governing the friction between dry surfaces are correct? |
| A. | The friction force is dependent on the materials of the contact surfaces. |
| B. | The friction force is directly proportional to the normal force. |
| C. | The friction force is independent of me area of contact. |
| D. | all of the above |
| Answer» E. | |
| 3969. |
A combination of kinematic pairs, joined in such a way that the relative motion between the links is completely constrained, is called a |
| A. | structure |
| B. | mechanism |
| C. | kinematic chain |
| D. | inversion |
| Answer» D. inversion | |
| 3970. |
A link or element need not to be a rigid body, but it must be a resistant body. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 3971. |
The velocity of the belt for maximum power is (where m = Mass of the belt in kg per metre length) |
| A. | <img src="/_files/images/mechanical-engineering/theory-of-machines/489-206-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/theory-of-machines/489-206-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/theory-of-machines/489-206-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/theory-of-machines/489-206-4.png"> |
| Answer» D. <img src="/_files/images/mechanical-engineering/theory-of-machines/489-206-4.png"> | |
| 3972. |
In a band and block brake, the ratio of tensions on tight side and slack side of the band is (where = Coefficient of friction between the blocks and the drum, = Semi-angle of each block subtending at the centre of drum, and n = Number of blocks) |
| A. | <img src="/_files/images/mechanical-engineering/theory-of-machines/506-352-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/theory-of-machines/506-352-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/theory-of-machines/506-352-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/theory-of-machines/506-352-4.png"> |
| Answer» E. | |
| 3973. |
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 | |
| 3974. |
In full depth involute system, the smallest number of teeth in a pinion which meshes with rack without interference is |
| A. | 12 |
| B. | 16 |
| C. | 25 |
| D. | 32 |
| Answer» E. | |
| 3975. |
When a shaking force is transmitted through the springs, damping becomes detrimental when the ratio of its frequency to the natural frequency is greater than |
| A. | 0.25 |
| B. | 0.5 |
| C. | 1 |
| D. | <span class="root">2</span> |
| Answer» E. | |
| 3976. |
When the nature of contact between the elements of a pair is such that it can turn or revolve about a fixed axis, the pair is known as a rolling pair. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 3977. |
Creep in belt drive is due to |
| A. | weak material of the belt |
| B. | weak material of the pulley |
| C. | uneven extensions and contractions of the belt when it passes from tight side to slack side |
| D. | expansion of the belt |
| Answer» D. expansion of the belt | |
| 3978. |
In the below figure, PC is the connecting rod and OC is the crank making an angle with the line of stroke PO and rotates with uniform angular velocity at rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral C Q NO, the acceleration of the piston is zero when the crank OC and connecting rod PC are at right angles to each other. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 3979. |
The contact ratio is the ratio of |
| A. | length of pair of contact to the circular pitch |
| B. | length of arc of contact to the circular pitch |
| C. | length of arc of approach to the circular pitch |
| D. | length of arc of recess to the circular pitch |
| Answer» C. length of arc of approach to the circular pitch | |
| 3980. |
An exact straight line motion mechanism is a |
| A. | Scott-Russell's mechanism |
| B. | Hart's mechanism |
| C. | Peaucellier's mechanism |
| D. | all of these |
| Answer» E. | |
| 3981. |
A Porter governor is a |
| A. | pendulum type governor |
| B. | dead weight governor |
| C. | spring loaded governor |
| D. | inertia governor |
| Answer» C. spring loaded governor | |
| 3982. |
A type-writer constitutes a machine. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 3983. |
Due to slip of belt, the velocity ratio of the belt drive increases. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 3984. |
The maximum efficiency of a screw jack is |
| A. | <img src="/_files/images/mechanical-engineering/theory-of-machines/486-173-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/theory-of-machines/486-173-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/theory-of-machines/486-173-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/theory-of-machines/486-173-4.png"> |
| Answer» B. <img src="/_files/images/mechanical-engineering/theory-of-machines/486-173-2.png"> | |
| 3985. |
When a mechanism is required to transmit power or to do some particular type of work, then it becomes a machine. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 3986. |
The component of the acceleration, parallel to the velocity of the particle, at the given instant is called |
| A. | radial component |
| B. | tangential component |
| C. | coriolis component |
| D. | none of these |
| Answer» C. coriolis component | |
| 3987. |
In a multiple V-belt drive, if one of the belt is broken, then we should replace |
| A. | the broken belt only |
| B. | all the belts |
| C. | the broken belt and the belts on either side of it |
| D. | none of the above |
| Answer» C. the broken belt and the belts on either side of it | |
| 3988. |
When a slider moves on a fixed link having curved surface, their instantaneous centre lies |
| A. | on their point of contact |
| B. | at the centre of curvature |
| C. | at the centre of circle |
| D. | at the pin joint |
| Answer» C. at the centre of circle | |
| 3989. |
The balancing of a rigid rotor can be achieved by appropriately placing balancing masses in |
| A. | a single plane |
| B. | two planes |
| C. | three planes |
| D. | four planes |
| Answer» C. three planes | |
| 3990. |
The frictional torque transmitted in a conical pivot bearing with assumption of uniform pressure is __________ as compared to uniform wear. |
| A. | less |
| B. | more |
| C. | same |
| Answer» C. same | |
| 3991. |
Scotch yoke mechanism is used to generate |
| A. | sine functions |
| B. | square roots |
| C. | logarithms |
| D. | inversions |
| Answer» B. square roots | |
| 3992. |
When the crank is at the outer dead centre, in a reciprocating steam engine, then the acceleration of the piston will be |
| A. | <img src="/_files/images/mechanical-engineering/theory-of-machines/496-285-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/theory-of-machines/496-285-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/theory-of-machines/496-285-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/theory-of-machines/496-285-4.png"> |
| Answer» C. <img src="/_files/images/mechanical-engineering/theory-of-machines/496-285-3.png"> | |
| 3993. |
The size of a gear is usually specified by |
| A. | pressure angle |
| B. | circular pitch |
| C. | diametral pitch |
| D. | pitch circle diameter |
| Answer» E. | |
| 3994. |
The example of successfully constrained motion is a |
| A. | motion of an I.C. engine valve |
| B. | motion of the shaft between a foot-step bearing |
| C. | piston reciprocating inside an engine cylinder |
| D. | all of the above |
| Answer» E. | |
| 3995. |
The angle which the normal reaction makes with the resultant reaction is called angle of friction. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 3996. |
Which one of the following can completely balance several masses revolving in different planes on a shaft? |
| A. | A single mass in different planes |
| B. | Two masses in any two planes |
| C. | A single mass in one of the planes of the revolving masses |
| D. | Two equal masses in any two planes |
| Answer» C. A single mass in one of the planes of the revolving masses | |
| 3997. |
The working depth of a gear is the radial distance from the |
| A. | pitch circle to the bottom of a tooth |
| B. | pitch circle to the top of a tooth |
| C. | top of a tooth to the bottom of a tooth |
| D. | addendum circle to the clearance circle |
| Answer» E. | |
| 3998. |
The acceleration of a particle at any instant has two components i.e. radial component and tangential component. These two components will be |
| A. | parallel to each other |
| B. | perpendicular to each other |
| C. | inclined at 45 |
| D. | opposite to each other |
| Answer» C. inclined at 45 | |
| 3999. |
When the axes of the first and last wheels are co-axial, then the train is known as |
| A. | simple train of wheels |
| B. | compound train of wheels |
| C. | reverted gear train |
| D. | epicyclic gear train |
| Answer» D. epicyclic gear train | |
| 4000. |
The primary unbalanced force is more than the secondary unbalanced force. |
| A. | True |
| B. | False |
| Answer» B. False | |