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Doctors Medicines MCQs Q&A

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Two pulleys are connected by a belt. The sum of the diameter of two pulleys is 90 cm and while the one makes 50 rpm, the other makes 20 revolutions. What will be the diameter of the pulleys?
Two pulleys are connected by a belt. The sum of the diameters of the pulleys is 92.6 cm and while one makes 50 rev/min the other make 200 rev/min. What will be the diameter of the pulleys?
If the number of pulleys in a system is equal to its velocity ratio, then it is a __________ system of pulleys.
The velocity ratio for the first system of pulleys is (where n is the number of pulleys.)
Five pulleys are arranged in the second system of pulleys. When not loadwd the effort required to raise the movable block is 35N. Further wastage in friction increases the pull at the rate of 3% of the load lifted. What is the efficiency of the system at 2kN?
Five pulleys are arranged in the second system of pulleys. When not loaded the effort required to raise the movable block is 35N. Further wastage in friction increases the pull at the rate of 3% of the load lifted. What is the effort required to raise a load of 2kN?
When two pulleys are connected by means of a cross belt drive, then both the pulleys will rotate in _________ directions.
The steel pulleys are __________ in weight than cast iron pulleys of the same capacity.
In first system of pulley, the Velocity ratio is equal to (where n : no. of pulleys)
The velocity ratio for the third system of pulleys is