10) Which one of the following is the reason that tap water is not preferred as coolant on machine tool ?

It decreases cutting action of the tool

Danger of corrosion

It has insufficient cooling effect

Due to high cooling effect the cutting edges of the tool break off

Answer is:

Danger of corrosion

Explanation:

Danger of corrosion is the reason that tap water is not preferred as coolant on machine tool.

Sliding friction

Rolling friction

Fluid friction

Dry friction

Answer is:

Tool steel

Grey cast iron

Copper

Aluminium

Answer is:

The overall lubrication and repair work carried out by the maintenance section in advance of the machine coming to breakdown

The maintenance work for any fault noticed during the work

Done to prevent the maintenance of machines

None of the above

Answer is:

Cutting oil

Grease

Lard oil

Kerosene oil

Answer is: