Sliding Contact Bearings: Material Properties Quiz

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What is the term used to describe a bearing where the diameters of the journal and bearing are equal?

Rolling contact bearing

Sliding contact bearing

Hydrodynamic bearing

Fitted bearing (correct)

In a hydrodynamic lubricated bearing, what happens when the journal rotates eccentrically with the bearing axis?

The journal and bearing diameters become unequal

The bearing material corrodes away

A pressure is built up in the clearance space (correct)

The bearing material deforms plastically

Which of the following is not a property of sliding contact bearing materials?

Coefficient of friction (correct)

Fatigue strength

Compressive strength

Embeddability

What is the ability of bearing material to accommodate small particles of dust or grit without scoring the journal material called?

Embeddability Signup and view all the answers

Which property of sliding contact bearing materials allows the bearing to accommodate shaft deflections and bearing inaccuracies by plastic deformation?

Conformability Signup and view all the answers

Which property of sliding contact bearing materials ensures the bearing does not corrode away under the action of lubricating oil?

Corrosion resistance Signup and view all the answers

What is the main difference between radial bearings and thrust bearings?

Radial bearings support loads perpendicular to the direction of motion, while thrust bearings support loads along the axis of rotation. Signup and view all the answers

What is the main difference between sliding contact bearings and rolling contact bearings?

Sliding contact bearings have steel balls or rollers between the moving and fixed elements, while rolling contact bearings have sliding contact between the surfaces. Signup and view all the answers

What is a full journal bearing?

A sliding contact bearing where the angle of contact between the bearing and journal is 360 degrees. Signup and view all the answers

What is the difference between a full journal bearing and a partial journal bearing?

Full journal bearings have a 360 degree contact angle, while partial journal bearings have a contact angle less than 360 degrees. Signup and view all the answers

What type of sliding contact bearing is a slipper or guide bearing?

A bearing where the sliding action is guided in a straight line and carries radial loads. Signup and view all the answers

What is a partial journal bearing with no clearance called?

A hydrodynamic bearing Signup and view all the answers

What is the primary purpose of using a bearing material with high thermal conductivity?

To allow for rapid removal of heat generated by friction Signup and view all the answers

Which property is important for bearing materials to maintain consistent clearance over a wide temperature range?

Low coefficient of thermal expansion Signup and view all the answers

Which of the following is a common type of sliding contact bearing material?

Babbitt metal Signup and view all the answers

What is the primary function of lubricants in bearings?

To reduce friction and dissipate heat Signup and view all the answers

Which of the following is a non-metallic bearing material?

Carbon-graphite Signup and view all the answers

What is a common property of silver and silver-lead bearings that makes them suitable for aircraft engines?

High fatigue strength Signup and view all the answers