Bearings and Their Types

What is the main purpose of bearings?

• To increase friction between moving parts

• To reduce the load on the shaft

• To generate heat between moving parts

• To prevent direct metal to metal contact between two elements in relative motion

Which of the following is NOT a type of rolling contact bearing?

• Angular contact ball bearing

• Deep groove ball bearing

• Journal bearing

• Needle roller bearing

What is a characteristic of self-aligning ball bearings?

• They have a high load rating

• They permit shaft deflections within two to three degrees

• They are used exclusively for axial loads

• They can handle high radial loads at high speed

Which type of bearing is designed to handle only axial loads?

• Thrust ball bearing

• Cylindrical roller bearing

• Needle roller bearing

• Spherical roller bearing

What is a unique feature of needle roller bearings?

• They have a spherical outer ring

• They are designed to handle only radial loads

• They are used for high-speed applications

• They use long, thin cylindrical rollers resembling needles

Which type of bearing is known for having no moving parts?

• Rolling contact bearing

• Journal bearing

• Plain bearing

• Fluid bearing

What is the primary advantage of fluid bearings?

• They have high friction

• They have lower friction, wear, and vibration

• They are used for low load applications

• They are used in slow-speed applications

Which type of bearing is typically used in mechanical watches?

• Taper roller bearing

• Jewel bearing

• Fluid bearing

• Needle roller bearing

What is the main function of a bearing in machinery?

• To prevent motion between the shaft and the load

• To generate heat between moving parts

• To produce relative motion between the shaft and carry the load of the shaft

• To increase the load on the shaft

Which type of bearing is used in high-speed gearboxes and heavy-duty vehicles?

• Plain bearing

• Journal bearing

• Spherical roller bearing

• Thrust ball bearing