Lubrication is the process of applying

• Oil

• Grease

• Lubricant

• None of these

Lubricants are found in

• Solid state

• Liquid state

• Gaseous state

• All of the above

A lubricant which is a mixture of oil, additives and thickeners is

• Semi solid lubricant

• Gaseous lubricant

• Liquid lubricant

• None of these

Graphite is an example of

• Solid lubricant

• Semi solid lubricant

The solid lubricants can work at higher temperatures in non oxidizing conditions

• True

• False

Vaseline is an example of

• Liquid lubricant

• Semi solid lubricant

Lubricants are classified based on their

• Applications

• Physical state

• Viscosity

• None of the above

Oil based lubricants cannot be applied at higher temperatures, because they may

• Evaporate

• Lead to combustion

• All of the above

Lubrication reduces

• Friction at contact surface

• Wear and tear

• All of the above

The process of reducing friction between sliding surfaces by introducing a slippery or smooth substance between them

• hydration

• lubrication

• hydrolysis

• hydrodynamics