A lifting machine lifts a load of 1000N through a distance of 0.2 m by means of an effort of 200N through a distance of 1m. This machine is an ideal one.

Related MCQs

• In a screw jack, the effort required to lift the load is given by. Where W = Load lifted, ? = Helix angle, and ? = Angle of friction
• A machine which is capable of doing work in the reversed direction, after the effort is re-moved, is called a non-reversible machine.
• A machine which is capable of doing any work in the reversed direction, after the effort is removed, is called a reversible machine.
• The mechanical advantage of a lifting machine is the ratio of
• If the efficiency of a lifting machine is kept constant, its velocity ratio is
• The efficiency of a lifting machine is the ratio of
• The maximum efficiency of a lifting machine is
• The maximum mechanical advantage of a lifting machine is
• In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is
• The velocity ratio of a simple wheel and axle with D and d as the diameters of effort wheel and load axle, is