3) The best example for semi-liquid lubricant is

Answer is:

Grease

Explanation:

The best example for semi-liquid lubricant is grease.

Answer is:

Explanation:

Best example for gravity feed lubrication is Wick feed lubricator.

Answer is:

Explanation:

Most common type of cutting fluid used in almost all the machining operation is soluble oil.

The temperature at which an oil gives off sufficient vapour to burn it continuously when ignited

The temperature at which an oil will cease to flow when cooled

The lowest temperature at which an oil gives off sufficient vapour to support a momentary flash without actually setting fire

The temperature at which fire is produced

Answer is:

Explanation:

Fire point is the lowest temperature at which an oil gives off sufficient vapor to support a momentary flash without actually setting fire.

Answer is:

Explanation:

Graphite is a solid lubricant.