LUBRICANTS AND COOLANTS MCQ PART – 2 FOR ITI FITTER TRADE SEM 4

1) Soluble oil is used as a cutting fluid in ......................

Sawing

Drilling and boring

Reaming

All of these

2) Usually, no cutting oil is used in .......................

Planning and shaping

Broaching

Thread rolling

Honing

3) The following device is used to determine the mix ratio of water-soluble coolants:

Diffract meter

Hydrometer

Refract meter

None of these

4) The use of metalworking fluids ..........................

Increases the tool life

Produces better surface finish

Prevents rise in temperature

All of these

5) The main constituent(s) of mineral oil is/ are ......................

Paraffin

Naphthenic

Aromatics

All of these

6) Which of the following is added to the cutting fluids so that soapy film is produced between the workpiece & tool and chip & tool face?

a) Sulphur

b) Chlorine

c) Both (a) and (b)

d) None of these

7) Viscosity is an internal property of a fluid, it is a measure of its resistance to ................

Sound

Light

Flow

Current

8) A high viscosity index indicates relatively …………………. changes in viscosity of the oil with the temperature.

a) Larger

b) Smaller

c) Constant

d) None of these

9) ………………… is the property of lubricating oil due to which the oil particles stick with the metal surfaces.

a) Oiliness

b) Pour point

c) Adhesiveness

d) None of these

10) ……………….. is the property of lubricating oil due to which the oil retains a thin film between the two surfaces.

a) Oiliness

b) Film Strength

c) Adhesiveness

d) None of these

11) Lubricating oil

a) Minimizes wear in moving parts

b) Helps in keeping the parts cool

c) Washes away and carry away dirt

d) All of these

12) In the following system, lubricating oil is carried in separate tanks from where it is fed to the engine

Splash system

Mist lubrication system

Wet sump system

Dry sump system

13) ………………… is the ability of the oil to resist internal deformation due to mechanical stresses.

a) Viscosity

b) Flashpoint

c) Fire point

d) None of these

14) The temperature at which the lubricant catches fire

Flashpoint

Viscosity

Fire point

Pour point

15) A temperature at which the vapours are given from the oil?

Fire point

Pour point

Oiliness

Flash point

16) Which one of the following is liquid lubricant?

Grease

Wax

Molybdenum disuiphide

Synthetic oil

17) Solid lubricant is ……………………..

Caster Oil

Grease

Lord Oil

Graphite

18) Cutting compound used during machining operation is ..............

Water

Tarpin Oil

Soluble Oil

Grease

19) Splash lubrication is done by ................

Pump Lubricator

Oil can

Ring Lubricator

Grease Gun