McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
Chapters
| 1. |
QFor generating Coons patch we require |
| A. | A set of grid points on surface |
| B. | A set of control points |
| C. | Four bounding curves defining surface |
| D. | Two bounding curves and a set of grid control points |
| Answer» C. Four bounding curves defining surface | |
| 2. |
In a 2-D CAD package, clockwise circular arc of radius, 5, specified from P1 (15,10) to P2 (10,15)will have its center at |
| A. | (10, 10) |
| B. | (15, 10) |
| C. | (15, 15) |
| D. | (10, 15) |
| Answer» A. (10, 10) | |
| 3. |
In the following geometric modelling techniques which are not three-dimensional modelling? |
| A. | Wireframe modelling |
| B. | Drafting |
| C. | Surface modelling |
| D. | solid modelling |
| Answer» B. Drafting | |
| 4. |
In the following three-dimensional modelling techniques. Which do not require much computer time and memory? |
| A. | Surface modelling |
| B. | Solid modelling |
| C. | Wireframe modelling |
| D. | All of the above |
| Answer» C. Wireframe modelling | |
| 5. |
In the following geometric modelling techniques. which cannot be used for finite element analysis: |
| A. | Wireframe modelling |
| B. | Surface modelling |
| C. | Solid modeling |
| D. | none of the above |
| Answer» D. none of the above | |
| 6. |
In the following geometric primitives. which is not a solid entity of CSG modelling: |
| A. | Box |
| B. | Cone |
| C. | Cylinder |
| D. | Circle |
| Answer» D. Circle | |
| 7. |
Which of the following is not an analytical entity? |
| A. | Line |
| B. | Circle |
| C. | Spline |
| D. | Parabola |
| Answer» C. Spline | |
| 8. |
Which of the following is not a synthetic entity? |
| A. | Hyperbola |
| B. | Bezier curve |
| C. | B-spline curve |
| D. | Cubic spline curve |
| Answer» A. Hyperbola | |
| 9. |
Which one of the following does not belong to the family of conics? |
| A. | Parabola |
| B. | Ellipse |
| C. | Hyperbola |
| D. | Line |
| Answer» D. Line | |
| 10. |
The number of tangents required to describe cubic splines is |
| A. | 2 |
| B. | 1 |
| C. | 3 |
| D. | 4 |
| Answer» B. 1 | |
| 11. |
The shape of Bezier curve is controlled by |
| A. | Control points |
| B. | Knots |
| C. | End points |
| D. | All the above |
| Answer» A. Control points | |
| 12. |
The curve that follows a convex hull property is: |
| A. | Cubic spline |
| B. | B-spline |
| C. | Bezier curve |
| D. | Both (b) and (c) |
| Answer» B. B-spline | |
| 13. |
The degree of the Bezier curve with n control points is |
| A. | n + 1 |
| B. | n - 1 |
| C. | n |
| D. | 2n |
| Answer» A. n + 1 | |
| 14. |
The degree of the B-spline with varying knot vectors |
| A. | Increases with knot vectors |
| B. | Decreases with knot vectors |
| C. | Remains constant |
| D. | none of the above |
| Answer» A. Increases with knot vectors | |
| 15. |
The number of non-coincidental points required to define the simplest surface are |
| A. | 4 |
| B. | 3 |
| C. | 2 |
| D. | 5 |
| Answer» B. 3 | |
| 16. |
The tensor product technique constraints surfaces by two curves. |
| A. | 2 |
| B. | 1 |
| C. | 3 |
| D. | 4 |
| Answer» B. 1 | |
| 17. |
In the bezier curve, the curve is always to first and last segments of the polygon |
| A. | normal |
| B. | parallel |
| C. | tangent |
| D. | none of the above |
| Answer» C. tangent | |
| 18. |
The unit vector in the direction of the line is defined as . |
| A. | tangent vector+length of the line |
| B. | tangent vector-length of the line |
| C. | tangent vector/length of the line |
| D. | length of the line/tangent vector |
| Answer» C. tangent vector/length of the line | |
| 19. |
From the following, which is an axisymmetric surface? |
| A. | Plane Surface |
| B. | Ruled Surface |
| C. | Surface of Revolution |
| D. | All of the above |
| Answer» C. Surface of Revolution | |
| 20. |
curves allow local control of the curve |
| A. | Analytical |
| B. | Hermite cubic spline |
| C. | Beizer |
| D. | B-Spline |
| Answer» D. B-Spline | |
| 21. |
To determine the coefficients of the equation – two end-points and the two tangent vectors. This statement is true for which of the following |
| A. | B-spline curve |
| B. | Hermite Cubic Spline Curve |
| C. | Beizer curve |
| D. | none of the above |
| Answer» B. Hermite Cubic Spline Curve | |
| 22. |
In synthetic curves, second-order continuity yields |
| A. | a position continuous curve |
| B. | a slope continuous curve |
| C. | a curvature continuous curve |
| D. | none of the above |
| Answer» C. a curvature continuous curve | |
| 23. |
Mathematically, the ellipse is a curve generated by a point moving in space such that at any position the sum of its distances from two fixed points (foci) is constant and equal to |
| A. | the major diameter |
| B. | the minor diameter |
| C. | semi major diameter |
| D. | semi-minor diameter |
| Answer» A. the major diameter | |
| 24. |
When a smooth curve is approximated through the data points, then the curve is known as |
| A. | interpolant curve |
| B. | approximation curve |
| C. | pitch curve |
| D. | data curve |
| Answer» B. approximation curve | |
| 25. |
In Beizer Curve, the curve follows |
| A. | the control points |
| B. | the shape of the defining polygon |
| C. | the defining points |
| D. | none of the above |
| Answer» B. the shape of the defining polygon | |
| 26. |
In Beizer Curve, the flexibility of the shape would increase with |
| A. | decrease in the number of vertices |
| B. | increase in the number of vertices |
| C. | decrease in control points |
| D. | none of the above |
| Answer» B. increase in the number of vertices | |
| 27. |
The number of control points can be added or subtracted in . |
| A. | Bezier curve |
| B. | B-spline curve |
| C. | Cubic spline curve |
| D. | all of the above |
| Answer» B. B-spline curve | |
| 28. |
The degree of the curve is independent of the number of control points in . |
| A. | Hermite cubic spline curve |
| B. | Bezier curve |
| C. | B-spline curve |
| D. | Hyperbola |
| Answer» C. B-spline curve | |
| 29. |
The is used to create a surface using curves that form closed boundaries. |
| A. | ruled Surface |
| B. | plane Surface |
| C. | coons patch |
| D. | surface of Revolution |
| Answer» C. coons patch | |
| 30. |
B-rep and C-Rep are the methods of |
| A. | solid modeling |
| B. | surface modeling |
| C. | wireframe modeling |
| D. | 2D modeling |
| Answer» A. solid modeling | |
| 31. |
Which kind of model can store information about geometry |
| A. | Solid model |
| B. | Surface model |
| C. | Wireframe model |
| D. | none of the above |
| Answer» A. Solid model | |
| 32. |
From the following, which method is also called as the Building Block Approach? |
| A. | Cellular Decomposition |
| B. | Spatial Occupancy Enumeration |
| C. | Generalized Sweeps |
| D. | Constructive Solid Geometry |
| Answer» D. Constructive Solid Geometry | |
| 33. |
Structuring and combining the primitives of the solid model in the graphics database, is achieved by the use of….. |
| A. | FEA |
| B. | transformations |
| C. | boolean operations |
| D. | none of the above |
| Answer» C. boolean operations | |
| 34. |
The data representation of CSG objects is represented by |
| A. | a binary tree |
| B. | a boolean operation |
| C. | a primitive |
| D. | none of the above |
| Answer» A. a binary tree | |
| 35. |
is an extension of the wireframe model with additional face information added. |
| A. | CSG |
| B. | B-rep |
| C. | Loft |
| D. | none of the above |
| Answer» B. B-rep | |
| 36. |
For 3D modeling of automobile body styling, which of the following is a preferred technique? |
| A. | Constructive Solid Geometry |
| B. | Pure Primitive Instancing |
| C. | Boundary Representation |
| D. | Spatial Occupancy Enumeration |
| Answer» C. Boundary Representation | |
| 37. |
Which of the following uses a number of two-dimensional profiles for generating a three-dimensional object? |
| A. | Tweaking |
| B. | Lofting |
| C. | Filleting |
| D. | none of the above |
| Answer» B. Lofting | |
| 38. |
To create a hollow part, which of the following command would be most efficient? |
| A. | Extrude |
| B. | Sweep |
| C. | Shell |
| D. | Revolve |
| Answer» C. Shell | |
| 39. |
The curve is defined as the locus of a point moving with _ degree of freedom |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» B. 1 | |
| 40. |
Write parametric equation of line having end points P1(3,5,8) and P2 (6,4,3). |
| A. | [3 5 8]+u[3 -1 -5] |
| B. | [3 5 8]+u[3 1 5] |
| C. | [3 8 5]+u[3 -1 -5] |
| D. | [3 5 8]+u[-3 1 5] |
| Answer» A. [3 5 8]+u[3 -1 -5] | |
| 41. |
Find the tangent vector of line having end points P1(3,5,8) and P2 (6,4,3) |
| A. | 3i+j-5k |
| B. | 3i-j-5k |
| C. | 3i-j+5k |
| D. | -3i-j-5k |
| Answer» B. 3i-j-5k | |
| 42. |
Find coordinates of points on line having end points P1(3,5,8) and P2 (6,4,3) at u=0.25 |
| A. | [3.75 4.25 6.25] |
| B. | [3.25 4.25 6.25] |
| C. | [3.75 4.75 6.75] |
| D. | [4.25 3.75 6.25] |
| Answer» C. [3.75 4.75 6.75] | |
| 43. |
Two lines are parallel when |
| A. | P1 X P2=0 |
| B. | P1 . P2=0 |
| C. | P1 = P2 |
| D. | P1+ P2=0 |
| Answer» A. P1 X P2=0 | |
| 44. |
Two lines L1 and L2 having Parametric equations are P1=[3 4 7]+u[2 2 -6] and P2=[1 5 -2]+u[1 4 2]. Tangent vector for line L1 |
| A. | 2i+2j-6k |
| B. | 2i+2j+6k |
| C. | 2i-2j-6k |
| D. | 6-2j-2k |
| Answer» A. 2i+2j-6k | |
| 45. |
For Q 45, Tangent vector for line L2 |
| A. | i+4j-k |
| B. | 2i+4j+k |
| C. | i-4j-2k |
| D. | i+4j+2k |
| Answer» D. i+4j+2k | |
| 46. |
For Q 45, Lines are perpendicular? |
| A. | True |
| B. | False |
| C. | D |
| Answer» B. False | |
| 47. |
Parametric equation for circle |
| A. | X=x+Rcosu; Y=y+Rsinu; Z=z |
| B. | X=Rcosu; Y=Rsinu; Z=z |
| C. | X=x+Rsinu; Y=y+Rcosu; Z=z |
| D. | X=Rsinu; Y=y+Rcosu; Z=z |
| Answer» A. X=x+Rcosu; Y=y+Rsinu; Z=z | |
| 48. |
Center point of circle |
| A. | [x1+x2]/2; [y1+y2]/2; [z1+z2]/2 |
| B. | [x1-x2]/2; [y1-y2]/2; [z1-z2]/2 |
| C. | [x1-x2]; [y1-y2]; [z1-z2] |
| D. | [x2-x1]; [y2-y1]; [z2-z1] |
| Answer» A. [x1+x2]/2; [y1+y2]/2; [z1+z2]/2 | |
| 49. |
A circle is represented by center point [5,5] and radius 6 units. Find the parametric equation of circle and determine the various points on circle in first quadrant if increment in angle by 45o |
| A. | 9.24,9.24 |
| B. | 9.42,9.42 |
| C. | 9,9 |
| D. | 11,5 |
| Answer» A. 9.24,9.24 | |
| 50. |
A circle is passing through two end points A[6,4] and B[10,10]. Find center point of circle |
| A. | 7,8 |
| B. | 8,8 |
| C. | 8,7 |
| D. | 7,7 |
| Answer» C. 8,7 | |
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