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Page 141 - Toucpad robotics C11
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    2.  The function of PWM (Pulse Width Modulation) in motor control is to:
                             i.  Measure distance                            ii.  Adjust motor speed

                            iii.  Store program code                        iv.  Generate electricity
                        3.  A closed-loop control system is superior to open-loop because it:
                             i.  Never requires sensors                      ii.  Uses feedback for accuracy

                            iii.  Consumes less power always                iv.  Requires no controller
                        4.  Which motor is most suitable for a 3D printer requiring incremental angular movements?
                             i.  DC motor                                    ii.  Servo motor

                            iii.  Stepper motor                             iv.  AC induction motor
                        5.  IR sensors primarily detect:

                             i.  Magnetic fields                             ii.  Heat signatures and proximity
                            iii.  Sound waves                               iv.  Water levels
                        6.  Ultrasonic sensors calculate distance using:

                             i.  Infrared light                              ii.  Electromagnetic waves
                            iii.  High-frequency sound waves                iv.  Magnetic fields

                        7.  Which among the following is an example of a closed-loop control system?
                             i.  Toaster                                     ii.  Fan regulator
                            iii.  Air conditioner with thermostat           iv.  Electric iron without thermostat

                        8.  The device that processes sensor inputs and sends signals to actuators is:
                             i.  Battery                                     ii.  Controller
                            iii.  End-effector                              iv.  Gearbox

                        9.  The rotation of a stepper motor is divided into:
                             i.  Infinite steps                              ii.  Continuous cycles
                            iii.  Discrete steps                            iv.  Random pulses

                        10.  A washing machine timer system without sensors is an example of:
                             i.  Closed-loop system                          ii.  Open-loop system

                            iii.  Hybrid system                             iv.  None of these
                     B.  Fill in the blanks.

                        1.  The components that convert electrical signals into physical motion are called        .
                        2.  A                    motor is used in robots for exact angular positioning.
                        3.  Ultrasonic sensors work by emitting and receiving              waves.
                        4.  In open-loop systems, there is no               signal.

                        5.  PWM stands for                  .
                        6.  Controllers in robots act as the              of the system.
                        7.  A stepper motor rotates in fixed              .
                        8.  An IR sensor is often used for              detection.
                        9.  Closed-loop systems rely on                 for correcting errors.

                        10.  A DC motor converts                  energy into mechanical energy.
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                                                                                                     Electrical and Control Systems

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