460+ CAD-CAM and Automation Solved MCQs

These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .

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51.	Shearing is also termed as
A.	Selecting
B.	Sorting
C.	Scaling
D.	Skewing
Answer» D. Skewing

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52.	Shearing and reflection are types of translation.
A.	True
B.	False
Answer» B. False

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53.	Which of this is compulsory for 2D reflection?
A.	Reflection plane.
B.	Origin
C.	Reflection axis
D.	Co-ordinate axis.
Answer» C. Reflection axis

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54.	Two successive translations are
A.	Multiplicative
B.	Inverse
C.	Subtractive
D.	Additive
Answer» D. Additive

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55.	Two successive translations are commutative.
A.	True
B.	False
Answer» A. True

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56.	General pivot point rotation can be expressed as
A.	T(zr,yr).R(θ).T(-zr,-yr) = R(xr,yr,θ)
B.	T(xr,yr).R(θ).T(-xr,-yr) = R(xr,yr,θ)
C.	T(xr,yr).R(θ).T(-xr,-yr) = R(zr,yr,θ)
D.	T(xr,yr).R(θ).T(-xr,-yr) = R(zr,yr,θ)
Answer» B. T(xr,yr).R(θ).T(-xr,-yr) = R(xr,yr,θ)

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57.	Which of the following is NOT correct (A, B and C are matrices)
A.	A∙B = B∙A
B.	A∙B∙C = (A∙B) ∙C = A∙ (B∙C)
C.	C(A+B) = C∙A + C∙B
D.	1 A = A 1
Answer» A. A∙B = B∙A

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58.	Reflection about the line y=0, the axis, is accomplished with the transformation matrix with how many elements as ‘0’?
A.	8
B.	9
C.	4
D.	6
Answer» D. 6

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59.	Which transformation distorts the shape of an object such that the transformed shape appears as if the object were composed of internal layers that had been caused to slide over each other?
A.	Rotation
B.	Scaling up
C.	Scaling down
D.	Shearing
Answer» D. Shearing

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60.	Transpose of a column matrix is
A.	Zero matrix
B.	Identity matrix
C.	Row matrix
D.	Diagonal matrix
Answer» C. Row matrix

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61.	Reversing the order in which a sequence of transformations is performed may affect the transformed position of an object.
A.	True
B.	False
Answer» A. True

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62.	How many minimum numbers of zeros are there in ‘3 x 3’ triangular matrix?
A.	4
B.	3
C.	5
D.	6
Answer» B. 3

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63.	The object space or the space in which the application model is defined is called
A.	World co-ordinate system
B.	Screen co-ordinate system
C.	World window
D.	Interface window
Answer» A. World co-ordinate system

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64.	What is the name of the space in which the image is displayed?
A.	World co-ordinate system
B.	Screen co-ordinate system
C.	World window
D.	Interface window
Answer» B. Screen co-ordinate system

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65.	What is the rectangle in the world defining the region that is to be displayed?
A.	World co-ordinate system
B.	Screen co-ordinate system
C.	World window
D.	Interface window
Answer» C. World window

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66.	The window opened on the raster graphics screen in which the image will be displayed is called
A.	World co-ordinate system
B.	Screen co-ordinate system
C.	World window
D.	Interface window
Answer» D. Interface window

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67.	The process of mapping a world window in World Coordinates to the Viewport is called Viewing transformation.
A.	True
B.	False
Answer» A. True

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68.	Panning is a technique in which users can change the size of the area to be viewed in order to see more detail or less detail.
A.	True
B.	False
Answer» B. False

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69.	Drawing of number of copies of the same image in rows and columns across the interface window so that they cover the entire window is called
A.	Roaming
B.	Panning
C.	Zooming
D.	Tiling
Answer» D. Tiling

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70.	By changing the dimensions of the viewport, the and of the objects being displayed can be manipulated.
A.	Number of pixels and image quality
B.	X co-ordinate and Y co-ordinate
C.	Size and proportions
D.	All of these
Answer» C. Size and proportions

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71.	Co-ordinates are ranging according to the screen resolution.
A.	True
B.	False
Answer» A. True

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72.	Any convenient co-ordinate system or Cartesian co-ordinates which can be used to define the picture is called
A.	spherical co-ordinates
B.	vector co-ordinates
C.	viewport co-ordinates
D.	world co-ordinates
Answer» D. world co-ordinates

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73.	The transformation of perspective projection must include, where d is the distance between the center of projection to the projection plane.
A.	D
B.	1/d
C.	-d
D.	-1/d
Answer» D. -1/d

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74.	An area on a display device to which a window is mapped is called a………….
A.	Window
B.	Viewpoint
C.	Pixel
D.	None of the above
Answer» B. Viewpoint

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75.	A Pixel is
A.	a computer program that draws picture
B.	A picture stored in secondary memory
C.	The smallest resolvable part of a picture
D.	All of the above
Answer» C. The smallest resolvable part of a picture

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76.	A system that automates the drafting process with interactive computer graphics is called
A.	Computer Aided Engineering (CAE)
B.	Computer Aided Design (CAD)
C.	Computer Aided Manufacturing (CAM)
D.	Computer Aided Instruction (CAI)
Answer» B. Computer Aided Design (CAD)

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77.	In which type of projection, actual dimensions and angles of objects and therefore shapes cannot be preserved?
A.	Orthographic
B.	Isometric
C.	Perspective
D.	None of the above
Answer» C. Perspective

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78.	Coordinate of □ABCD is WCS are: lowermost corner A(2,2) & diagonal corner are C(8,6). W.r.t MCS. The coordinates of origin of WCS system are (5,4). If the axes of WCS are at 600 in CCW w.r.t. the axes of MCS. Find new vertices of point A in MCS.
A.	(4.268, 6.732)
B.	(5.268, 6.732)
C.	(4.268, 4.732)
D.	(6.268, 4.732)
Answer» A. (4.268, 6.732)

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79.	A line AB with end points A (2, 1) & B (7, 6) is to be moved by 3 units in x-direction & 4 units in y-direction. Calculate new coordinates of points B.
A.	(10, 2)
B.	(2, 10)
C.	(10, 10)
D.	(10, 5)
Answer» C. (10, 10)

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80.	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

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81.	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)

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82.	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

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83.	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

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84.	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

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85.	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

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86.	Which of the following is not an analytical entity?
A.	Line
B.	Circle
C.	Spline
D.	Parabola
Answer» C. Spline

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87.	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

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88.	Which one of the following does not belong to the family of conics?
A.	Parabola
B.	Ellipse
C.	Hyperbola
D.	Line
Answer» D. Line

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89.	The number of tangents required to describe cubic splines is
A.	2
B.	1
C.	3
D.	4
Answer» B. 1

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90.	The shape of Bezier curve is controlled by
A.	Control points
B.	Knots
C.	End points
D.	All the above
Answer» A. Control points

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91.	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

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92.	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

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93.	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

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94.	The number of non-coincidental points required to define the simplest surface are
A.	4
B.	3
C.	2
D.	5
Answer» B. 3

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95.	The tensor product technique constraints surfaces by two curves.
A.	2
B.	1
C.	3
D.	4
Answer» B. 1

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96.	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

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97.	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

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98.	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

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99.	curves allow local control of the curve
A.	Analytical
B.	Hermite cubic spline
C.	Beizer
D.	B-Spline
Answer» D. B-Spline

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100.	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

discuss

460+ CAD-CAM and Automation Solved MCQs

Shearing is also termed as

Shearing and reflection are types of translation.

Which of this is compulsory for 2D reflection?

Two successive translations are

Two successive translations are commutative.

General pivot point rotation can be expressed as

Which of the following is NOT correct (A, B and C are matrices)

Reflection about the line y=0, the axis, is accomplished with the transformation matrix with how many elements as ‘0’?

Which transformation distorts the shape of an object such that the transformed shape appears as if the object were composed of internal layers that had been caused to slide over each other?

Transpose of a column matrix is

Reversing the order in which a sequence of transformations is performed may affect the transformed position of an object.

How many minimum numbers of zeros are there in ‘3 x 3’ triangular matrix?

The object space or the space in which the application model is defined is called

What is the name of the space in which the image is displayed?

What is the rectangle in the world defining the region that is to be displayed?

The window opened on the raster graphics screen in which the image will be displayed is called

The process of mapping a world window in World Coordinates to the Viewport is called Viewing transformation.

Panning is a technique in which users can change the size of the area to be viewed in order to see more detail or less detail.

Drawing of number of copies of the same image in rows and columns across the interface window so that they cover the entire window is called

By changing the dimensions of the viewport, the and of the objects being displayed can be manipulated.

Co-ordinates are ranging according to the screen resolution.

Any convenient co-ordinate system or Cartesian co-ordinates which can be used to define the picture is called

The transformation of perspective projection must include, where d is the distance between the center of projection to the projection plane.

An area on a display device to which a window is mapped is called a………….

A Pixel is

A system that automates the drafting process with interactive computer graphics is called

In which type of projection, actual dimensions and angles of objects and therefore shapes cannot be preserved?

Coordinate of □ABCD is WCS are: lowermost corner A(2,2) & diagonal corner are C(8,6). W.r.t MCS. The coordinates of origin of WCS system are (5,4). If the axes of WCS are at 600 in CCW w.r.t. the axes of MCS. Find new vertices of point A in MCS.

A line AB with end points A (2, 1) & B (7, 6) is to be moved by 3 units in x-direction & 4 units in y-direction. Calculate new coordinates of points B.

QFor generating Coons patch we require

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

In the following geometric modelling techniques which are not three-dimensional modelling?

In the following three-dimensional modelling techniques. Which do not require much computer time and memory?

In the following geometric modelling techniques. which cannot be used for finite element analysis:

In the following geometric primitives. which is not a solid entity of CSG modelling:

Which of the following is not an analytical entity?

Which of the following is not a synthetic entity?

Which one of the following does not belong to the family of conics?

The number of tangents required to describe cubic splines is

The shape of Bezier curve is controlled by

The curve that follows a convex hull property is:

The degree of the Bezier curve with n control points is

The degree of the B-spline with varying knot vectors

The number of non-coincidental points required to define the simplest surface are

The tensor product technique constraints surfaces by two curves.

In the bezier curve, the curve is always to first and last segments of the polygon

The unit vector in the direction of the line is defined as .

From the following, which is an axisymmetric surface?

curves allow local control of the curve

To determine the coefficients of the equation – two end-points and the two tangent vectors. This statement is true for which of the following