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[MCQ’s] Cad Cam
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Module 01
1.From following, which modeller defines model without mass properties?
(A) wireframe
(B) primitive
(C) B-rep
(D) CSG
Answer:B
2.The model which is created by using basic entities of two dimensioning is called
(A) Surface model
(B) Wire frame model
(C) Solid model
(D) Isometric model
Answer:B
3.When every entity of a geometric model remains parallel to its initial position, the transformation is called as
(A) Scaling
(B) Translation
(C) Rotation
(D) Mirror
Answer:B
4.The number of line required to represent a cube in a wire frame model is
(A) 8
(B) 6
(C) 12
(D) 16
Answer:C
5.Which of the following are ways of representing 3D objects?
(A) Wire models
(B) Surface models
(C) Solid models
(D) All of the above
Answer:D
6.From following, which modeller defines model without mass properties?
(A) wireframe
(B) primitive
(C) B-rep
(D) CSG
Answer:B
7.The model which is created by using basic entities of two dimensioning is called
(A) Surface model
(B) Wire frame model
(C) Solid model
(D) Isometric model
Answer:B
8.When every entity of a geometric model remains parallel to its initial position, the transformation is called as
(A) Scaling
(B) Translation
(C) Rotation
(D) Mirror
Answer:B
9.The number of line required to represent a cube in a wire frame model is
(A) 8
(B) 6
(C) 12
(D) 16
Answer:C
10.Which of the following are ways of representing 3D objects?
(A) Wire models
(B) Surface models
(C) Solid models
(D) All of the above
Answer:D
11.From following, which modeller defines model without mass properties?
(A) wireframe
(B) primitive
(C) B-rep
(D) CSG
Answer:B
12.The model which is created by using basic entities of two dimensioning is called
(A) Surface model
(B) Wire frame model
(C) Solid model
(D) Isometric model
Answer:B
13.When every entity of a geometric model remains parallel to its initial position, the transformation is called as
(A) Scaling
(B) Translation
(C) Rotation
(D) Mirror
Answer:B
14.The number of line required to represent a cube in a wire frame model is
(A) 8
(B) 6
(C) 12
(D) 16
Answer:C
15.Which of the following are ways of representing 3D objects?
(A) Wire models
(B) Surface models
(C) Solid models
(D) All of the above
Answer:D
Module 02
1. A translation is applied to an object by
a) Repositioning it along with straight line path
b) Repositioning it along with circular path
c) Only b
d) All of the mentioned
Answer: a
Explanation: A translation is applied to an object by repositioning it along with straight line path from one location to another.
2. We translate a two-dimensional point by adding
a) Translation distances
b) Translation difference
c) X and Y
d) Only a
Answer: d
Explanation: We can translate 2D point by adding translation distances dx and dy.
3. The translation distances (dx, dy) is called as
a) Translation vector
b) Shift vector
c) Both a and b
d) Neither a nor b
Answer: c
Explanation: The translation distances (dx, dy) from its original position is called as translation vector or shift vector.
4. In 2D-translation, a point (x, y) can move to the new position (x’, y’) by using the equation
a) x’=x+dx and y’=y+dx
b) x’=x+dx and y’=y+dy
c) X’=x+dy and Y’=y+dx
d) X’=x-dx and y’=y-dy
Answer: b
Explanation: By adding translation distance dx and dy to its originsl position (x, y) we can obtain a new position (x’, y’).
5.The two-dimensional translation equation in the matrix form is
a) P’=P+T
b) P’=P-T
c) P’=P*T
d) P’=p
Answer: a
Explanation: The 2D translation equation is P’=P+T.
6. _________ is a rigid body transformation that moves objects without deformation.
a) Rotation
b) Scaling
c) Translation
d) All of the mentioned
Answer: c
Explanation: Translation a rigid body transformation that moves objects without deformation.
7. A straight line segment is translated by applying the transformation equation
a) P’=P+T
b) Dx and Dy
c) P’=P+P
d) Only c
Answer: a
Explanation: A straight line segment is translated by applying the transformation equation P’=P+T to each of line endpoints.
8. Polygons are translated by adding __________ to the coordinate position of each vertex and the current attribute setting.
a) Straight line path
b) Translation vector
c) Differences
d) Only b
Answer: d
Explanation: None.
9. To change the position of a circle or ellipse we translate
a) Center coordinates
b) Center coordinates and redraw the figure in new location
c) Outline coordinates
d) All of the mentioned
Answer: b
Explanation: By translating the center coordinates and redraw the figure in new location we can change the position of a circle or ellipse.
10.The basic geometric transformations are
a) Translation
b) Rotation
c) Scaling
d) All of the mentioned
Answer: d
Explanation: These are the basic geometric transformations and other transformations are reflection and shear.
11. A two dimensional rotation is applied to an object by
a) Repositioning it along with straight line path
b) Repositioning it along with circular path
c) Only b
d) Any of the mentioned
Answer: c
Explanation: A two dimensional rotation is applied to an object by repositioning it along with circular path.
12. To generate a rotation , we must specify
a) Rotation angle ϴ
b) Distances dx and dy
c) Rotation distance
d) All of the mentioned
Answer: a
Explanation: Generate a rotation, we must specify rotation angle ϴ of the rotation point or pivot point which the object is to be rotated.
13. Positive values for the rotation angle ϴ defines
a) Counterclockwise rotations about the end points
b) Counterclockwise translation about the pivot point
c) Counterclockwise rotations about the pivot point
d) Negative direction
Answer: c
Explanation: A positive value for the rotation angle ϴ defines counterclockwise rotations about the pivot point.
14. The rotation axis that is perpendicular to the xy plane and passes through the pivot point is known as
a) Rotation
b) Translation
c) Scaling
d) Shearing
Answer: a
Explanation: The rotation transformation is also described as a rotation about a rotation axis that is perpendicular to the xy plane and passes through the pivot point.
15. The original coordinates of the point in polor coordinates are
a) X’=r cos (Ф +ϴ) and Y’=r cos (Ф +ϴ)
b) X’=r cos (Ф +ϴ) and Y’=r sin (Ф +ϴ)
c) X’=r cos (Ф -ϴ) and Y’=r cos (Ф -ϴ)
d) X’=r cos (Ф +ϴ) and Y’=r sin (Ф -ϴ)
Answer: b
Explanation: The original coordinates of the point in polor coordinates are X’=r cos (Ф +ϴ) and Y’=r sin (Ф +ϴ).
16. The two-dimensional rotation equation in the matrix form is
a) P’=P+T
b) P’=R*P
c) P’=P*P
d) P’=R+P
Answer: b
Explanation: The 2D translation equation is P’=R*P.
17. ________ is the rigid body transformation that moves object without deformation.
a) Translation
b) Scaling
c) Rotation
d) Shearing
Answer: c
Explanation: Rotation is the rigid body transformation that moves object without deformation.
18. An ellipse can also be rotated about its center coordinates by rotating
a) End points
b) Major and minor axes
c) Only a
d) None
Answer: b
Explanation: None.
19. The transformation that is used to alter the size of an object is
a) Scaling
b) Rotation
c) Translation
d) Reflection
Answer: a
Explanation: Scaling is used to alter the size of an object.
20. The two-dimensional scaling equation in the matrix form is
a) P’=P+T
b) P’=S*P
c) P’=P*R
d) P’=R+S
Answer: b
Explanation: The 2d scaling equation is P’=S*P.
21. Scaling of a polygon is done by computing
a) The product of (x, y) of each vertex
b) (x, y) of end points
c) Center coordinates
d) Only a
Answer: d
Explanation: Scaling of a polygon is done by computing the product of (x, y) of each vertex with scaling factor sx and sy to produce the transformation coordinates ( Xnew, Ynew).
22. If the scaling factors values sx and sy < 1 then
a) It reduces the size of object
b) It increases the size of object
c) It stunts the shape of an object
d) None
Answer: a
Explanation: If the scaling factors values sx and sy < 1 then it reduces the size of object.
23. If the scaling factors values sx and sy are assigned to the same value then
a) Uniform rotation is produced
b) Uniform scaling is produced
c) Scaling cannot be done
d) Scaling can be done or cannot be done
Answer: b
Explanation: When sx and sy are assigned the same value then uniform scaling is produced that maintains relative object proportions.
24. If the scaling factors values sx and sy are assigned to unequal values then
a) Uniform rotation is produced
b) Uniform scaling is produced
c) Differential scaling is produced
d) Scaling cannot be done
Answer: c
Explanation: Unequal values for sx and sy results in differential scaling that is often used in design applications.
25. The objects transformed using the equation P’=S*P should be
a) Scaled
b) Repositioned
c) Both a and b
d) Neither a nor b
Answer: c
Explanation: The objects transformed using the equation P’=S*P should be scaled and repositioned.
26. We control the location of a scaled object by choosing the position is known as
a) Pivot point
b) Fixed point
c) Differential scaling
d) Uniform scaling
Answer: b
Explanation: None.
27. If the value of sx=1 and sy=1 then
a) Reduce the size of object
b) Distort the picture
c) Produce an enlargement
d) No change in the size of an object
Answer: d
Explanation: sx=sx=1 does not change the size of the object.
28. The polygons are scaled by applying the following transformation.
a) X’=x * Sx + Xf(1-Sx) and Y’=y * Sy + Yf(1-Sy)
b) X’=x * Sx + Xf(1+Sx) and Y’=y * Sy + Yf(1+Sy)
c) X’=x * Sx + Xf(1-Sx) and Y’=y * Sy – Yf(1-Sy)
d) X’=x * Sx * Xf(1-Sx) and Y’=y * Sy * Yf(1-Sy)
Answer: a
Explanation: The polygons are scaled by applying the transformation X’=x * Sx + Xf(1-Sx) and Y’=y * Sy + Yf(1-Sy).
29. Two successive translations are___________________
a) Multiplicative
b) Inverse
c) Subtractive
d) Additive
Answer: d
Explanation: Successive translations are additive.
P’= T(tx1, ty1) .[T(tx2, ty2)] P
= {T(tx1, ty1). T(tx2, ty2)}.P
Or T(tx1, ty1). T(tx2, ty2) = T(tx1+tx2 , ty1 + ty2).
30. Two successive translations are not commutative.
a) True
b) False
Answer: b
Explanation: According to commutative property, the order does not matter. Same as in the case of successive translations. Hence we can say that two successive translations are commutative.
31. 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(xr,yr,Q)
Answer: b
Explanation: Since the first two parameters are in 2D, hence only ‘x’ and ‘y’ can be variable along with ‘θ’. In other options, there is one more parameter ‘z’.
32. 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
Explanation: Matrix multiplication does not commute. We cannot switch the order of the factors and expect to end up with the same result. Hence, A.B ≠ B.A.
33. 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
Explanation: The matrix used for reflection about y=0 is an identity matrix with 6 ‘0’s and two ‘1’s and one element as ‘-1’.
34. 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
Explanation: Two common shearing transformations are the type of transformation that shift coordinate x values coordinate y values. In shear transformation, the transformed shape appears as if the object were composed of internal layers that had been caused to slide over each other.
35. Transpose of a column matrix is________________
a) Zero matrix
b) Identity matrix
c) Row matrix
d) Diagonal matrix
Answer: c
Explanation: Transpose of a matrix is a matrix which is made by interchanging the rows and columns of the original matrix. Hence the transpose of column matrix is row matrix and vice versa.
36. 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
Explanation: As we know that, matrix transformations are not commutative and the order of transformation matters. So it will affect the position of the object.
37. Which one of the following is the correct notation of a matrix with ‘m’ rows and ’n’ columns?
a) m + n
b) m – n
c) m x n
d) m/n
Answer: c
Explanation: m x n represents a matrix with ‘m’ number of rows and ‘n’ number of columns, while others are just arithmetic operations which can be done on 2 matrices.
38. How many minimum numbers of zeros are there in ‘3 x 3’ triangular matrix?
a) 4
b) 3
c) 5
d) 6
Answer: b
Explanation: In a triangular matrix, all entries, either above or below the diagonal are zero. So in case of ‘3 x 3’ matrix, there should be minimum 3 elements as 0.
39. 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
Explanation: World Coordinate System also called as WCS is any coordinate systems that describe the physical coordinates associated with a data array. They also used for an astronomical image, or for determining the wavelength scale for a spectrum.
40. 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
Explanation: The coordinate system of the screen is a Cartesian coordinate system. The origin (0,0) is at the top left of the screen. Point is denoted by (x,y), where x is x co-ordinate and y is y co-ordinate.
41. 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
Explanation: The world window specifies which part of the window needs to be drawn. It also defines which part of the window should be drawn and which part outside the window should not be drawn and should be clipped away.
42. 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
Explanation: In common words, it is termed as a Graphic user interface. It allows users to interact with electronic devices through graphical icons and visual indicators such as secondary notation.
43. The process of mapping a world window in World Coordinates to the Viewport is called Viewing transformation.
a) True
b) False
Answer: a
Explanation: The viewing transformation is the operation of computer graphics in which the maps are the perspective view of an object in world coordinates into a physical device’s display space.
44. The scale factor of viewport transformation for x co-ordinate is ________
a) Sx = (svmax – svmin)/ (swmax – swmin)
b) Sx = (svmax – svmin)/ (swmax + swmin)
c) Sx = (svmin – svmax)/ (swmax – swmin)
d) Sx = (svmax + svmin)/ (swmax – swmin)
Answer: a
Explanation: The mapping or transformation involves developing formulas that start with a point in the world window, say (xw, yw). The formula is used to produce a corresponding point in viewport coordinates, say (xv, yv). So after keeping it proportional in ‘x’ co-ordinate, we get, (svmax– svmin)/ (swmax – swmin).
45. The scale factor of viewport transformation for x co-ordinate is ________
a) Sy = (svmax + svmin)/ (swmax + swmin)
b) Sy = (svmax – svmin)/ (swmax + swmin)
c) Sy = (svmax – svmin)/ (swmax – swmin)
d) Sy = (svmax + svmin)/ (swmax – swmin)
Answer: c
Explanation: The mapping or transformation involves developing formulas that start with a point in the world window, say (xw, yw). The formula is used to produce a corresponding point in viewport coordinates, say (xv, yv). So after keeping it proportional in ‘y’ co-ordinate, we get, (svmax – svmin)/ (swmax – swmin).
46. 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
Explanation: The technique in which users can change the size of the area to be viewed in order to see more detail or less detail is called ‘Zooming’. Panning means sliding the camera.
47. 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
Explanation: 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 ‘tilling’. To achieve tiling in computer graphics, the window remains static and the viewport is changed many times.
48. 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
Explanation: By changing the dimensions of the viewport, the size and proportions of the objects being displayed can be manipulated, this leads to the zooming effect of the image by successively mapping different dimensioned clipping windows on a fixed sized viewport.
Module 03
1. CAD/CAM is the relationship between
a) science and engineering
b) manufacturing and marketing
c) design and manufacturing
d) design and marketing
Answer: c
Explanation: None
2. The process in which the detailed specifications materials, dimensions, tolerances and surface rough is made is known as
a) decision process
b) analysis process
c) implementation process
d) refinement process
Answer: c
Explanation: Decision process is the cognitive process resulting in the selection of a belief or a course of action among several alternative possibilities while implementation process is the detailed specifications materials, dimensions, tolerances and surface rough is made.
3. Which two disciplines are tied by a common database?
a) documentation and geometric modeling
b) CAD and CAM
c) drafting and documentation
d) none of the mentioned
Answer: b
Explanation: Because of their joint benefits, computer- aided design and computer-aided manufacturing are often combined into CAD/ CAM systems. This combination allows the transfer of information from the design stage to the stage of planning for manufacture, without the need to reenter the data on part geometry manually.
4. The term that is used for geometric modelling like solid modelling, wire frame modelling and drafting is known as
a) software package
b) operating system
c) application software
d) none of the mentioned
Answer: a
Explanation: Software package is used for geometric modelling like solid modelling, wire frame modelling and drafting while operating system is is software that manages computer hardware and software resources and provides common services for computer programs.
5. The system environment in a mainframe computer consists of
a) central processing
b) storage devices
c) printers and plotters
d) both central processing and storage devices
Answer: d
Explanation: None
6. The nerve center or brain of any computer system is known as
a) CPU
b) Storage device
c) ALU
d) Monitor
Answer: a
Explanation: None
7. Locating devices are classified as
a) text input device
b) graphic device
c) all of the mentioned
d) none of the mentioned
Answer: b
Explanation: GDI is responsible for tasks such as drawing lines and curves, rendering fonts and handling palettes.
8. A potentiometric device that contains sets of variable registers which feed signals that indicate the device position to the computer is known as
a) track ball
b) mouse
c) joystick
d) all of the mentioned
Answer: c
Explanation: None
9. Which of the following devices do not produce a hard copy?
a) impact printers
b) plotters
c) CRT terminals
d) non-impact printers
Answer: c
Explanation: CRT terminals always plot graphics or images.
10. The software that is used to control the computer’s work flow, organize its data and perform house keeping functions is known as
a) operating software
b) graphics software
c) application software
d) programming software
Answer: a
Explanation: Operating software is used to control the computer’s work flow, organize its data and perform house keeping functions.
Graphics software is used to provide users with various functions to perform geometric modelling and construction.
Application software performs the data entry, design, analysis, drafting and manufacturing functions.
Programming software enables the to implement custom application or modify the system for specialized needs.
11. The software that is used to provide the users with various functions to perform geometric modelling and construction is known as
a) operating software
b) graphics software
c) application software
d) programming software
Answer: b
Explanation: Operating software is used to control the computer’s work flow, organize its data and perform house keeping functions.
Graphics software is used to provide users with various functions to perform geometric modelling and construction.
Application software performs the data entry, design, analysis, drafting and manufacturing functions.
Programming software enables the to implement custom application or modify the system for specialized needs.
12. The software that performs the data entry, design, analysis, drafting and manufacturing functions is known as
a) operating software
b) graphics software
c) application software
d) programming software
Answer: c
Explanation: Operating software is used to control the computer’s work flow, organize its data and perform house keeping functions.
Graphics software is used to provide users with various functions to perform geometric modelling and construction.
Application software performs the data entry, design, analysis, drafting and manufacturing functions.
Programming software enables the to implement custom application or modify the system for specialized needs.
13. The software that enables the to implement custom application or modify the system for specialized needs is known as
a) operating software
b) graphics software
c) application software
d) programming software
Answer: d
Explanation: Operating software is used to control the computer’s work flow, organize its data and perform house keeping functions.
Graphics software is used to provide users with various functions to perform geometric modelling and construction.
Application software performs the data entry, design, analysis, drafting and manufacturing functions.
Programming software enables the to implement custom application or modify the system for specialized needs.
14. Following is not an operating system software
a) Windows
b) UNIX
c) VAX/VMS
d) IDEAS
Answer: d
Explanation: Except IDEAS all are the operating systems.
15. The basic geometric building blocks provided in a CAD/CAM package are
a) points
b) lines
c) circles
d) all of the mentioned
Answer: d
Explanation: None
Module 04
1. During the execution of a CNC part program block NO20 GO2 X45.0 Y25.0 R5.0 the type of tool motion will be
a) circular Interpolation – clockwise
b) circular Interpolation – counterclockwise
c) linear Interpolation
d) rapid feed
Answer: a
Explanation: Given:-NO20 GO2 X45.0 Y25.0 R5.0
Here term X45.0 Y25.0 R5.0 will produce circular motion because radius is consider in this term and GO2 will produce clockwise motion of the tool.
2. In an NC machining operation, the tool has to be moved from point (5, 4) to point (7, 2) along a circular path with centre at (5, 2). Before starting the operation, the tool is at (5, 4). The correct G and N codes for this motion are
a) N010GO3X7.0Y2.0I5.0J2.0
b) N010GO2X7.0Y2.0I5.0J2.0
c) N010GO1X7.0Y2.0I5.0J2.0
d) N010GOOX7.0Y2.0I5.0J2.0
Answer: b
Explanation: Given : Initial point (5, 4), Final point (7, 2), Centre (5, 4)
So, the G, N codes for this motion are N010GO2X7.0Y2.0 15.0J2.0
where, GO2 ” Clockwise circular interpolation
X7.0Y2.0 ” Final point
I5.0J2.0 ” Centre point.
3. The tool of an NC machine has to move along a circular arc from (5, 5) to (10, 10) while performing an operation. The centre of the arc is at (10, 5). Which one of the following NC tool path command performs the above mentioned operation?
a) N010 GO2 X10 Y10 X5 Y5 R5
b) N010 GO3 X10 Y10 X5 Y5 R5
c) N010 GO1 X5 Y5 X10 Y10 R5
d) N010 GO2 X5 Y5 X10 Y10 R5
Answer: a
Explanation: N010 “represent start the operation
GO2 “represent circular (clock wise) interpolation
X10Y10 “represent final coordinates
X5Y5 “represent starting coordinate
R5 “represent radius of the arc
So, NC tool path command is, N010 GO2 X10 Y10 X5 Y5 R5.
4. NC contouring is an example of
a) continuous path positioning
b) point-to-point positioning
c) absolute positioning
d) incremental positioning
Answer: a
Explanation: NC contouring is a continuous path positioning system. Its function is to synchronize the axes of motion to generate a predetermined path, generally a line or a circular arc.
5. Match the following:
NC code Definition P. M05 1. Absolute coordinate system Q. G01 2. Dwell R. G04 3. Spindle stop S. G09 4. Linear interpolation
a) P-2, Q-3, R-4, S-1
b) P-3, Q-4, R-1, S-2
c) P-3, Q-4, R-2, S-1
d) P-4, Q-3, R-2, S-1
Answer: c
Explanation: NC code Definition
P. M05 3. Spindle stop
Q. G01 4. Linear interpolation
R. G04 2. Dwell
S. G09 1. Absolute coordinate system
So, correct pairs are, P-3, Q-4, R-2, S-1.
6. In a CNC program block, N002 GO2 G91 X40 Z40……,GO2 and G91 refer to
a) circular interpolation in counterclockwise direction and incremental dimension
b) circular interpolation in counterclockwise direction and absolute dimension
c) circular interpolation in clockwise direction and incremental dimension
d) circular interpolation in clockwise direction and absolute dimension
Answer: c
Explanation: GO2 represent circular interpolation in clockwise direction.
G91 represent incremental dimension.
7. Numerical control ___________
a) applies only to milling machines
b) is a method for producing exact number of parts per hour
c) is a method for controlling by means of set of instructions
d) none of the mentioned
Answer: c
Explanation: NC is a method for controlling by means of set of instructions.
CNC performs the data processing functions.
8. Computer will perform the data processing functions in
a) NC
b) CNC
c) DNC
d) None of the mentioned
Answer: b
Explanation: NC is a method for controlling by means of set of instructions.
CNC performs the data processing functions.
9. Control loop unit of M.C.U is always
a) a hardware unit
b) a software unit
c) a control unit
d) none of the mentioned
Answer: a
Explanation: None.
10. The repeatability of NC machine depends on
a) control loop errors
b) mechanical errors
c) electrical errors
d) none of the mentioned
Answer: b
Explanation: None.
11. Rotation about Z-axis is called
a) a-axis
b) b-axis
c) c-axis
d) none of the mentioned
Answer: c
Explanation: Rotation about X-axis is called a-axis.
Rotation about Y-axis is called b-axis.
Rotation about Z-axis is called c-axis.
12. Rotation of spindle is designated by one of the following axis:
a) a-axis
b) b-axis
c) c-axis
d) none of the mentioned
Answer: d
Explanation: None.
13. The linking of computer with a communication system is called
a) networking
b) pairing
c) interlocking
d) assembling
Answer: a
Explanation: Networking is the practice of linking two or more computing devices together for the purpose of sharing data.
Pairing is the linking of computer with a communication system.
Interlocking is to fit into each other, as parts of machinery, so that all action is synchronized.
14. The process of putting data into a storage location is called
a) reading
b) writing
c) controlling
d) hand shaking
Answer: b
Explanation: Reading is the process of copying data from a memory location.
Writing is the process of putting data into a storage location.
15. The process of copying data from a memory location is called
a) reading
b) writing
c) controlling
d) hand shaking
Answer: a
Explanation: Reading is the process of copying data from a memory location.
Writing is the process of putting data into a storage location.
16.CAPP stands for____.
(A) Computer Aided Progress Panning
(B) Computer Added Process Planning
(C) Computer Aided Process Planning
(D) Computer Aided Product Planning
Answer:C
17.____ is the bridge between design and manufacturing.
(A) Production planning
(B) Process Planning
(C) Product design
(D) None of the above
Answer:B
18.From which of the following is the type of computer aided process planning.
(A) Variant process planning
(B) Generative process planning
(C) Both (A) & (B)
(D) None of the above
Answer:C
19.Full form of CIM is ____ in manufacturing systems.
(A) Computer Integrated Maintenance
(B) Computer Internal Manufacturing
(C) Computer Intermediate Manufacturing
(D) Computer Integrated Manufacturing
Answer:D
20.From the following which is not the type of protocol used in CIM?
(A) Open standard interconnection – OSI
(B) Manufacturing Automation Protocol – MAP
(C) Technical and Industrial Protocol – TIP
(D) None of the above
Answer:C
Module 05
1.Which one is NOT related to rapid prototyping definition?
(A) Layer by layer
(B) Physical model
(C) From 3D CAD data
(D) Production line
Answer:D
2.Which one of the processes is NOT using a laser?
(A) LOM
(B) SLA
(C) SLS
(D) FDM
Answer:D
3.Which of the following is the process in the RP cycle?
(A) Post-processing
(B) Transfer to machine
(C) Pre-processing
(D) All of the above
Answer:D
4.Which of the process is available in colors?
(A) SLA
(B) FDM
(C) MJM
(D) 3D Printer
Answer:D
5.What is the full name of SLS?
(A) Selective Laser Simulator
(B) Sintering Laser Simulator
(C) Selective Laser Sintering
(D) Stereolithography Laser Sintering
Answer:C
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