LUBRICANTS AND COOLANTS MCQ PART – 4 FOR ITI FITTER TRADE SEM 4

1) To minimize friction in bearing a thin film of materials is used known as

graphite

cutting oil

lubricant

coolant

2) Which cutting oil is used for stainless steel cutting?

Grease

Lard

Sulphur base mineral oil

None of the above

3) How the lubricants are classified?

Liquid

Semi-liquid

Solid

All of the above

4) What SAE 30 number indicate?

Viscosity

Fire point

Flashpoint

Pour point

5) Which lubricant is generally used for the lubrication of roller bearing?

Semi-solid

Solid

Liquid

None of these

6) Which one of the following cutting fluid is suitable for drilling mild steel?

Synthetic soluble oil

Soluble oil + water

Terpentine

Distilled water

7) What is the purpose of cutting fluid while drilling?

To avoid colouring of the chips

To avoid the corrosion of polished machine parts

To use it as a cleaning medium and flash the chips

To cool and lubricate the chips and the tool edge

8) Soluble oil is the popular cutting fluid used on mild steel for drilling purpose. Which one of the cutting fluid is suitable on mild steel for surface grinding purpose?

Soluble oil

Mineral oil

Dry air

Synthetic soluble oil

9) State why any coolant is not used while drilling on cast iron?

Due to low cutting speed

Chips do not form while drilling on it

The cutting tool is made up of strong material

Cast iron itself has self-lubricating properties

10) The temperature on which the lubricant freezes is called .............

Pour point

Viscosity

Fire point

Flash point

11) The property of oil by which it can withstand pressure without squeezing out from bearing surfaces.

Specific volume

Density

Viscosity

Specific gravity

12) Which one of the following is NOT a solid lubricant?

Grease

Wax

Graphite

Soap stone

13) To make heavy lubricant and increase its viscosity, 5 to 20 % fatty oil is mixed in the lubricating oil. Such oil is known as ...............

Mineral oil

Organic oil

Synthetic oil

Blended oil