Multiple choice Which of the following simple machines is termed as the revolving lever of first order? Screw Inclined plane Pulley Wheel and axle Wedge Reveal answer Fill a bubble to check yourself D Correct answer Explanation Wheel and axle arrangement is also a kind of lever where the arms of the lever are at the radii of the wheel and axle and its centre acts as the fulcrum. It may be termed as revolving lever of the first order.