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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.
| 951. |
The moment on the pulley which produces rotation is called |
| A. | Inertia |
| B. | Momentum |
| C. | Moment of momentum |
| D. | Torque |
| Answer» E. | |
| 952. |
In locomotives, the ratio of the connecting rod length to me crank radius is kept very large in order to |
| A. | Minimize the effect of primary forces |
| B. | Minimize the effect of secondary forces |
| C. | Have perfect balancing |
| D. | To start the locomotive quickly |
| Answer» C. Have perfect balancing | |
| 953. |
A point B on a rigid link AB moves with respect to A with angular velocity ω rad/s. The radial component of the acceleration of B with respect to A, is (where vBA = Linear velocity of B with respect to A)# |
| A. | vBA √ó AB |
| B. | vBA /AB |
| C. | v²BA |
| D. | v²BA /AB |
| Answer» E. | |
| 954. |
Coriolis component is encountered in |
| A. | Quick return mechanism of shaper |
| B. | Four bar chain mechanism |
| C. | Slider crank mechanism |
| D. | Both (A) and (C) above |
| Answer» B. Four bar chain mechanism | |
| 955. |
The periodic time of one oscillation for a simple pendulum is |
| A. | 2œÄ. ‚à ö(g/l) |
| B. | (1/2œÄ). ‚à ö(g/l) |
| C. | 2œÄ. ‚à ö(l/g) |
| D. | (1/2œÄ). ‚à ö(l/g) |
| Answer» D. (1/2≈ì√Ñ). ‚Äö√ √∂(l/g) | |
| 956. |
If ω/ωn = 2, where co is the frequency of excitation and ωn is the natural frequency of vibrations, then the transmissibility of vibration will the# |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 2 |
| Answer» C. 1.5 | |
| 957. |
Which of the following disciplines provides study of inertia forces arising from the combined effect of the mass and the motion of the parts? |
| A. | Theory of machines |
| B. | Applied mechanics |
| C. | Mechanisms |
| D. | Kinetics |
| Answer» E. | |
| 958. |
A higher pair has__________. |
| A. | Point contact |
| B. | Surface contact |
| C. | No contact |
| D. | None of the above |
| Answer» B. Surface contact | |
| 959. |
The relation between number of links (l) and number of joints (j) in a kinematic chain is |
| A. | l = (1/2).(j + 2) |
| B. | l = (2/3).(j + 2) |
| C. | l = (3/4).(j + 3) |
| D. | l = j + 4 |
| Answer» C. l = (3/4).(j + 3) | |
| 960. |
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 | |
| 961. |
The radial distance from the top of a tooth to the bottom of a tooth in a meshing gear, is called |
| A. | Dedendum |
| B. | Addendum |
| C. | Clearance |
| D. | Working depth |
| Answer» D. Working depth | |
| 962. |
In automobiles the power is transmitted from gear box to differential through |
| A. | Bevel gear |
| B. | Universal joint |
| C. | Hooke's joint |
| D. | Knuckle joint |
| Answer» D. Knuckle joint | |
| 963. |
The acceleration of the particle moving with simple harmonic motion is _________ at the mean position. |
| A. | Zero |
| B. | Minimum |
| C. | Maximum |
| D. | None of these |
| Answer» B. Minimum | |
| 964. |
Hammer blow |
| A. | Is the maximum horizontal unbalanced force caused by the mass provided to balance the reciprocating masses. |
| B. | Is the maximum vertical unbalanced force caused by the mass added to balance the reciprocating masses |
| C. | Varies as the square root of the speed |
| D. | Varies inversely with the square of the speed |
| Answer» C. Varies as the square root of the speed | |
| 965. |
The Klein's diagram is used when |
| A. | Crank has uniform angular velocity |
| B. | Crank has nonuniform angular velocity |
| C. | Crank has uniform angular acceleration |
| D. | Crank has nonuniform angular acceleration |
| Answer» B. Crank has nonuniform angular velocity | |
| 966. |
Idler pulley is used |
| A. | For changing the direction of motion of the belt |
| B. | For applying tension |
| C. | For increasing velocity ratio |
| D. | All of the above |
| Answer» C. For increasing velocity ratio | |
| 967. |
In a simple train of wheels, the velocity ratio __________ the intermediate wheels. |
| A. | Depends upon |
| B. | Is independent of |
| C. | Either A or B |
| D. | None of these |
| Answer» C. Either A or B | |
| 968. |
The Ackerman steering gear mechanism is preferred to the Davis steering gear mechanism, because |
| A. | Whole of the mechanism in the Ackerman steering gear is on the back of the front wheels |
| B. | The Ackerman steering gear consists of turning pairs |
| C. | The Ackerman steering gear is most economical |
| D. | Both (A) and (B) |
| Answer» E. | |
| 969. |
Pulley in a belt drive acts as |
| A. | Cylindrical pair |
| B. | Turning pair |
| C. | Rolling pair |
| D. | Sliding pair |
| Answer» D. Sliding pair | |
| 970. |
In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to |
| A. | 0.2 |
| B. | 0.4 |
| C. | 0.6 |
| D. | 0.8 |
| Answer» D. 0.8 | |
| 971. |
What is the number of instantaneous centers for an eight link mechanism? |
| A. | 15 |
| B. | 28 |
| C. | 30 |
| D. | 8 |
| Answer» C. 30 | |
| 972. |
The behaviour of gases can be fully determined by |
| A. | 1 law |
| B. | 2 laws |
| C. | 3 laws |
| D. | 4 laws |
| Answer» E. | |
| 973. |
The flank of the tooth is the surface of the tooth __________ the pitch surface. |
| A. | Above |
| B. | Below |
| C. | At |
| D. | None of these |
| Answer» C. At | |
| 974. |
Which of the following is used to control the speed variations of the engine caused by the fluctuations of the engine turning moment? |
| A. | D-slide valve |
| B. | Governor |
| C. | Flywheel |
| D. | Meyer's expansion valve |
| Answer» D. Meyer's expansion valve | |
| 975. |
When the nature of contact between the elements of a pair is such that it can only slide relative to the other, the pair is known as a |
| A. | Screw pair |
| B. | Spherical pair |
| C. | Turning pair |
| D. | Sliding pair |
| Answer» E. | |
| 976. |
In considering friction of a V-thread, the virtual coefficient of friction (μ₁) is given by# |
| A. | μ₁ = μ sin β |
| B. | μ₁ = μ cos β |
| C. | μ₁ = μ/sin β |
| D. | μ₁ = μ/cos β |
| Answer» E. | |
| 977. |
In a differential band brake as shown in the below figure, if the length OB is greater than OA, then the force P at C should act in the downward direction. |
| A. | Yes |
| B. | No |
| C. | Unpredictable |
| D. | None of these |
| Answer» C. Unpredictable | |