This set of Flexible Manufacturing System Multiple Choice Questions & Answers (MCQs) focuses on “Fundamentals of NC Technology”.
1. Which is a set of step by step commands that directs the actions of processing equipments?
a) Command
b) Part Program
c) Algorithm
d) Pseudo code
View Answer
Explanation: A set of detailed step by step commands that directs the actions of processing equipments is known as Part Program. The commands are given based on the geometry of the part piece to be machined.
2. Who prepares the part program?
a) Part Programmer
b) Guided Vehicles
c) Robots
d) Machine
View Answer
Explanation: Part programs are prepared by part programmer. The duty of part programmer is to observe the dimensions of the final product and to provide commands to the machine to machine the product from the raw material.
3. Punched tapes which were used as a medium to transfer for interpreting with the machine control unit has been largely replaced by new storage devices such as magnetic tapes.
a) True
b) False
View Answer
Explanation: In olden days, 1 inched wide punched tape was used as a medium to transfer for interpreting with the machine control unit. In this generation this has been replaced by new storage devices such as magnetic tapes.
4. Which must be defined by the part programmer in order to program the NC processing equipment?
a) Control System
b) Material storage system
c) Transport System
d) Standard Axis System
View Answer
Explanation: In order to program the NC processing equipment, a standard axis system must be defined by the part programmer. This is accomplished by specifying the position of the work head relative to the work part.
5. Which of the following does the axis system of NC based upon?
a) Polar Coordinates
b) Spherical Coordinates
c) Cartesian Coordinates
d) Cylindrical Coordinates
View Answer
Explanation: The axis system of Numerical Control system is based upon Cartesian Coordinates. In this system, each point is uniquely specified in a plane by a set of numerical coordinates. They are given sign variations on either perpendicular oriented lines which are of same unit of length.
6. Which of the following plane defines the path of the cutting tool relative to the rotating work piece?
a) y-z
b) x-z
c) z-y
d) x-y
View Answer
Explanation: x-z defines the path of the cutting tool relative to the rotating work piece. y-z, z-y and x-y planes will not be usually used defines the path of the cutting tool relative to the rotating work piece in CNC operations.
7. Which axis gives the radial location of the tool?
a) X-axis
b) Y-axis
c) Z-axis
d) R-axis
View Answer
Explanation: The radial location of the tool is given by X-axis. Y-axis, Z-axis and R-axis cannot be used denote the radial location of the tool.
8. Which axis is parallel to the axis of the rotational part?
a) Y-axis
b) X-axis
c) P-axis
d) Z-axis
View Answer
Explanation: The axis is parallel to the axis of the rotational part is Z-axis. Y-axis, X-axis and P-axis are not parallel to the axis of the rotational part.
9. Machine Tools with rotational axis have two linear axes.
a) False
b) True
View Answer
Explanation: Machine Tools with rotational axis have three linear axes. In addition to that, they have one or two rotational axes. Of these three, one is used to represent the length, another one will be used to denote height and the final parameter is used to denote the depth of the object.
10. What does a-, b- and c- rotational axis specify about x-, y- and z-axes?
a) Bipolar Positions
b) Linear Positions
c) Angular Positions
d) Intermittent Positions
View Answer
Explanation: Angular Positions are specified by a-, b- and c- rotational axis about the x-, y- and z-axes respectively. Bipolar Positions, Linear Positions and Intermittent Positions cannot be specified by a-, b- and c- rotational axis specify about x-, y- and z-axes.
11. Which Positioning system defines the work head locations with respect to the origin of the axis system?
a) Incremental Positioning
b) Absolute Positioning
c) Circular Positioning
d) Angular Positioning
View Answer
Explanation: Absolute Positioning system defines the work head locations with respect to the origin of the axis system. The part programmer has to carefully choose the positioning system and should maintain the same positioning system throughout.
12. Which Positioning system defines the next work head locations relative to the previous position?
a) Incremental Positioning
b) Polar Positioning
c) Absolute Positioning
d) Circular Positioning
View Answer
Explanation: Incremental Positioning system defines the next work head locations relative to the previous position. Polar Positioning, Absolute Positioning and Circular Positioning are not usually used to define the next work head locations relative to the previous position.
Sanfoundry Global Education & Learning Series – Flexible Manufacturing System.
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