MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Mechanics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Determine the x coordinate of centroid of the wire in the shape of circle as shown. |
| A. | 2R/π |
| B. | 2/π |
| C. | 2R/3 |
| D. | 2R/5 |
| Answer» B. 2/π | |
| 2. |
The body is sometimes acted by two or three force members. The difference between the two and the three force members is ________________ |
| A. | The former is collinear and the latter is parallel |
| B. | The former is parallel and the latter is perpendicular |
| C. | The former is perpendicular and the latter is collinear |
| D. | The former is acting on two points in the body while the latter is on three points |
| Answer» E. | |
| 3. |
One of the use of the centre of mass or centroid is as in the simplification of the loading system the net force acts at the ___________ of the loading body. |
| A. | Centroid |
| B. | The centre axis |
| C. | The corner |
| D. | The base |
| Answer» B. The centre axis | |
| 4. |
Determine the y coordinate of centroid of the wire in the shape of circle as shown. |
| A. | 2R/π |
| B. | 2/π |
| C. | 2R/3 |
| D. | 2R/5View Answer |
| Answer» B. 2/π | |
| 5. |
If solving the question in 3D calculations is difficult, then use the 2D system and then equate the ratio of the product of the centroid of the section to its mass to the total mass of the body to the centre of mass. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
We first make equilibrium equations of the body by considering all the three dimensional forces and then the free body diagram is made and then equations are made to be applied so as to calculate the centre of mass. |
| A. | The first part of the statement is false and other part is true |
| B. | The first part of the statement is false and other part is false too |
| C. | The first part of the statement is true and other part is false |
| D. | The first part of the statement is true and other part is true too |
| Answer» E. | |
| 7. |
A body’s all small particles have a small mass which is being applied by them to the body, which adds up to the total mass of the body. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
One of the use of the centre of mass or centroid is as in the simplification of the loading system the net force acts at the ___________ of the loading body.$ |
| A. | Centroid |
| B. | The centre axis |
| C. | The corner |
| D. | The base |
| Answer» B. The centre axis | |
| 9. |
If solving the question in 3D calculations is difficult, then use the 2D system and then equate the ratio of the product of the centroid of the section to its mass to the total mass of the body to the centre of mass? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
What is not the condition for the equilibrium in calculations involved in the determination of the centre of mass? |
| A. | ‚àëFx=0 |
| B. | ‚àëFy=0 |
| C. | ‚àëFz=0 |
| D. | ∑F≠0 |
| Answer» E. | |
| 11. |
A body’s all small particles have a small mass which is being applied by them to the body, which adds up to the total mass of the body.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
The all small masses that are being applied by all the infinite particles of the body act __________ to each other. |
| A. | Parallel |
| B. | Perpendicular |
| C. | Collinear |
| D. | Divergent |
| Answer» B. Perpendicular | |
| 13. |
The total of all the masses of small particles adds up to give the total body mass. This mass lies along with gravity gives a force vector which is being passed by ________ |
| A. | Axis of rotation |
| B. | Axis of rolling |
| C. | Centre of Gravity |
| D. | Centre of mass |
| Answer» D. Centre of mass | |
| 14. |
We use sometimes the measures to know the direction of moment in the calculations of the centre of mass. It is done by right handed coordinate system. Which is right about it(consider the mentioned axis to be positive)? |
| A. | Thumb is z-axis, fingers curled from x-axis to y-axis |
| B. | Thumb is x-axis, fingers curled from z-axis to y-axis |
| C. | Thumb is y-axis, fingers curled from x-axis to z-axis |
| D. | Thumb is z-axis, fingers curled from y-axis to x-axis |
| Answer» B. Thumb is x-axis, fingers curled from z-axis to y-axis | |
| 15. |
Mass is best given by _______ |
| A. | Product of volume and density |
| B. | Ratio of mass to density |
| C. | Addition of mass and density |
| D. | Subtraction of mass and density |
| Answer» C. Addition of mass and density | |