ADF ADF Mechanical Reasoning

Question 1

Gear A has 20 teeth and meshes with Gear B which has 10 teeth. If Gear A completes one full rotation, how many rotations does Gear B complete?

Accepted Answer

Two rotations

Answer

Half a rotation

Answer

One rotation

Answer

Four rotations

Question 2

Which class of lever has the effort force applied between the fulcrum and the load?

Accepted Answer

Third-class lever

Answer

First-class lever

Answer

Second-class lever

Answer

Fourth-class lever

Question 3

A system uses one fixed pulley and one movable pulley. By what factor does this reduce the force needed to lift a load?

Accepted Answer

Force is reduced by half

Answer

Force is unchanged

Answer

Force is reduced by one quarter

Answer

Force is doubled

Question 4

Water flows through a pipe that suddenly narrows. What happens to the water's velocity in the narrower section?

Accepted Answer

Velocity increases

Answer

Velocity decreases

Answer

Velocity stays the same

Answer

Flow stops

Question 5

Of the following materials, which is the best conductor of electricity?

Accepted Answer

Copper

Answer

Rubber

Answer

Glass

Answer

Wood

Question 6

What mechanical advantage does a wedge provide?

Accepted Answer

It multiplies the applied force over a shorter distance

Answer

It reduces the work done on the load

Answer

It only changes the direction of force without multiplying it

Answer

It increases friction to hold objects in place