FREE OAR Mechanical Reasoning Question and Answers

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A ship is launched up toward a mountain range by a cannon. Where will the projectile's maximum velocity be, disregarding air resistance?

Correct! Wrong!

Explanation:
The x and y components, which make up the velocity, are two separate elements. During flight, the x component remains constant, while the projectile's weight causes the positive y component of velocity to drop. Therefore, before the y component has reduced, the overall velocity will be at its highest.

Which direction will demand more pulling power?

Correct! Wrong!

Explanation:
The force is split into usable force (x direction) and not useful force when the rope is not parallel to the intended route of motion (y direction). The man will need to exert greater force if just some of the force is helpful in order to attain the same pulling power as if the rope were parallel to the table.

The horizontal surface area of the larger piston is four times that of the smaller piston. How much farther will the larger piston go if the smaller piston is compressed by 8 inches?

Correct! Wrong!

Explanation:
When the small piston is compressed, the volume of one piston decreases while the volume of the other piston increases because the liquid's volume remains constant. Since the volume is equal to the area times the height, the larger piston's height only needs to increase by a fourth of what the smaller piston did.

What temperature will ice be formed from mineral water?

Correct! Wrong!

Explanation:
The temperature must be below zero degrees because minerals lower the melting point of water.

These pulleys are connected by belts. Which pulley moves the most quickly?

Correct! Wrong!

Explanation:
The pulley with the smaller radius spins more quickly because two connected pulleys have the same linear speed. The intermediate pulley will rotate more slowly than the largest pulley. The smallest pulley will rotate the fastest because it will spin more quickly than the intermediate pulley.

To balance this beam, where should the fulcrum be placed?

Correct! Wrong!

Explanation:
The distance between the large mass and the fulcrum should be reduced since the large mass will generate a greater torque at the same distance from the fulcrum as the small mass. The torque generated by the large mass will then decrease, while the torque generated by the small mass will rise.

How many times does Gear C rotate in 3 minutes if Gear A is moving at 10 rotations per minute?

Correct! Wrong!

Explanation:
There are exactly equal numbers of teeth in gears A and C. As a result, the speed of gears A and C will be equal. The total number of revolutions is determined by multiplying the rpm by the number of minutes because gear C rotates at 10 rpm.

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