Q1. Choose the correct answer 1. Which among the following are the elements of rotational motion? a. Mass, Spring, Friction b. Inertia, Damper, Spring c. Work, Energy, Power d. Force, Pressure, Viscocity 2. Force balancing equation of a mass elements is (where x = displacement) a) M dx/dt. b) M dx/dt. c) M *x. d) Any of the above. 3. By using which of the following elements, mechanical translational systems are obtained? a) Mass element. b) Spring element. c) Dash-pot. d) All of the above. 4. Which among the following controls the speed of D.C. motor? a. Galvanometer b. Gauss meter c. Potentiometer d. Tachometer 5. Which of the following is an open loop control system? a. Field controlled D.C. motor c. Metaldyne b. Ward leonard control d. Stroboscope