A screw jack used for lifting the loads is

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
• The mechanical advantage of a lifting machine is the ratio of
• 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.
• 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 screw jcak, the effort required to lower the load is