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    C.  State whether these statements are true or false.
                        1.  The concept of robots was first described only in the 20th century.
                        2.  Robotics is an interdisciplinary field.

                        3.  Robots can never work in dangerous or hazardous environments.
                        4.  The Unimate robot was designed to work in automobile factories.
                        5.  All robots are humanoid in shape and design.

                     D.  Match the following:
                        1.  Manipulator                              a.  Explores planets
                        2.  Mobile Robot                             b.  Social interaction
                        3.  Humanoid Robot                           c.  Performs tasks like welding
                        4.  Space Robot                              d.  Moves on wheels or legs
                        5.  Social Robot                             e.  Looks and acts like humans

                                                      SECTION B   (Subjective Type Questions)

                     A.  Short answer type questions.
                        1.  Define a Robot.
                            Ans.  RIA defines a robot as a—programmable, multifunction manipulator designed to Move materials, parts,
                                 tools or special devices through variable programmed motions for the performance of the variety of tasks||.
                        2.  Explain the types of rotary joint notations.
                            Ans.  l  Rotational joint (type R)
                                 l  Twisting joint (type T)
                                 l  Revolving joint (type V)
                        3.  What is meant by workspace?
                            Ans.  The space in which the end point of the robot arm is capable of operating is called as workspace in other
                                 words reach ability of robot arm is known as workspace.
                        4.  What is meant by accuracy of robot?
                            Ans.  The robot‘s ability to reach a reference point within the robot‘s full work volume is known as accuracy
                                 of robot.
                        5.  What are the benefits of industrial robots?
                            Ans.  l  Increased Productivity
                                 l  Significant Savings
                                 l  Improved Quality
                                 l  Better Safety
                                 l  Competitive Edge
                        6.  What is repeatability of robot?

                            Ans.  Repeatability refers to robot’s ability to return to the programmed point when it is commanded to do so.
                        7.  Define the term work envelop?
                            Ans.  The work envelop is described by the surface of the workspace.
                        8.  What is work volume?
                            Ans.  The volume of the space swept by the robot arm is called work volume.
                        9.  What is meant by quality of robot?
                            Ans.  A Robot is said to be high quality when the precision and accuracy is more.

                                                                                                                           47
                                                                                        Introduction to Robots: What Exactly are They?

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