4) Best example for gravity feed lubrication is

Grease gun

Ring lubricator

Tell-tale lubricator

Wick feed lubricator

Answer is:

Wick feed lubricator

Water

Lard oil

Soluble oil

Compressed air

Answer is:

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:

Liquid lubricant

Semi-liquid lubricant

Solid lubricant

None of the above

Answer is:

Explanation:

Graphite is a solid lubricant.

Ring lubricator

Wick feed lubricator

Grease gun

Pump lubricator

Answer is:

Explanation:

The best example for splash lubrication is ring lubricator.