simple machines test questions

Simple Machines - In all the above examples, a machine either multiplies or reduces the effect of the force that is applied. A bicycle is a machine which is used to gain speed. We gain speed by exerting additional force. When we try to ride a bicycle up a ste..

A bicycle is a machine which is used to gain speed. We gain speed by exerting additional force. When we try to ride a bicycle up a steep hill, we soon realize that we gain speed by applying greater force. It is impossible to multiply both the force and gain the speed at the same tim..

From times immemorial, man has used machines to help him in his work. Today, we are dependent on machine for almost every task. When we think of machines we always tend to think of big and complicated units with many moving parts like wheels and rollers and gears and s..

It is a device which helps us to do the work at one point and deliver at another point with a view of accomplishing the work more easily or with a gain in speed. We use machines to multiply force or to change the direction of the force or to increase or decrease the speed etc. Cutting pl..

Heart Lung Machine - Before surgeons can perform open-heart surgery or heart transplants or even to correct a simple heart defect, they have to be able to open up the heart and expose the chambers. To enable this, circulation and respiration are maintained by the heart - lung ..

There are 78 workers for every 12 machines in a factory. What is the ratio of the number of machines to workers? => 2 : 13 or 13 : 2 or 1 : 13 or 13 : 1..

Machine A can do a work in 6 hours. Machine B and C together can do the same work in 4 hours. If the three machines are being used together, how long will it take to complete the job? => 3 hours or 2 hours or 2 hours 24 minutes or 3 hours 30 minutes..

A machine produces 24 items in 4 hours. How many items does the machine produce in 6 hours? => 40 or 36 or 38 or 32..

A company sold 4332 washing machines in a year. Round the number of washing machines sold to the nearest ten. => 4330 or 4350 or 4340 or 4320..

The cost of a machine decreased from $1800 to $1500. Find the percent of decrease in the cost of the machine. => 21.7% or 31.7% or 16.7% or 26.7%..