Roller Bearing — Questions and answers

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What did Leonardo da Vinci's sketches show for reducing friction in rotational movement?

Choices

  1. Using large, flat plates.
  2. Using small, rolling spheres. ✓
  3. Using thick ropes.
  4. Using strong magnets.

Answer: Using small, rolling spheres.

From page 3

Who received the first patent for a practical roller bearing in 1794?

Choices

  1. Elias Croft
  2. Philip Vaughan ✓
  3. Leonardo da Vinci
  4. Dr. Aris Thorne

Answer: Philip Vaughan

From page 4

What kind of roller bearing did Henry Timken patent to help with forces pushing both inward and sideways, like on wagon wheels?

Choices

  1. Spherical roller bearing
  2. Cylindrical roller bearing
  3. Tapered roller bearing ✓
  4. Plain roller bearing

Answer: Tapered roller bearing

From page 5

What is the main idea behind how all roller bearings work?

Choices

  1. To create more sliding friction.
  2. To replace rolling friction with sliding friction.
  3. To replace sliding friction with rolling friction. ✓
  4. To make things spin slower.

Answer: To replace sliding friction with rolling friction.

From page 6

What special ability does the tapered roller bearing have, thanks to its conical rollers?

Choices

  1. It can make objects float.
  2. It can change color.
  3. It can handle forces pushing both up and down.
  4. It can handle forces pushing perpendicular and parallel to the shaft (radial and axial loads). ✓

Answer: It can handle forces pushing perpendicular and parallel to the shaft (radial and axial loads).

From page 7

How did reliable roller bearings help railroads?

Choices

  1. They made trains lighter.
  2. They made trains able to carry heavier loads faster with less friction and maintenance. ✓
  3. They made trains able to fly.
  4. They made trains look shinier.

Answer: They made trains able to carry heavier loads faster with less friction and maintenance.

From page 8

What did Maria Rossi say about roller bearings and modern cars?

Choices

  1. Modern cars only need one bearing.
  2. Cars can drive without any bearings.
  3. Every major mechanical system in a car relies on bearings, and without them, modern vehicles wouldn't exist. ✓
  4. Bearings are only used in car radios.

Answer: Every major mechanical system in a car relies on bearings, and without them, modern vehicles wouldn't exist.

From page 9

Where can you find roller bearings today?

Choices

  1. Only in very old machines.
  2. Only in skateboards.
  3. In many things, from robotics to wind turbines and skateboards to mining equipment. ✓
  4. Nowhere, they are no longer used.

Answer: In many things, from robotics to wind turbines and skateboards to mining equipment.

From page 10