The efficiency of a lifting machine is the ratio of

Related MCQs

• If the efficiency of a lifting machine is kept constant, its velocity ratio is
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• 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.
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• A screw jack used for lifting the loads is
• A machine having an efficiency less than 50%, is known as
• A machine having an efficiency greater than 50%, is known as
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• For a self locking machine, the efficiency must be