LUBRICANTS AND COOLANTS MCQ 2


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

Sawing

Drilling and boring

Reaming

All of these


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

Honing

Thread rolling

Planing and shaping

Broaching


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 metal working 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 work piece & 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

Current

Light

Flow


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 a 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 carries 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

Mist lubrication system

Dry sump system

Splash system

Wet sump system


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

a) Viscosity

b) Flash point

c) Fire point

d) None of these


14) Temperature at which the lubricant catches fire

Pour point

Fire point

Viscosity

Flash point


15) Temperature at which the vapours is given of from the oil ?

Pour point

Oiliness

Flash point

Fire point


16) Which one of the following is liquid lubricant?

Grease

Wax

Molybdenum disuiphide

Synthetic oil


18) Solid lubricant is ……………………..

Caster Oil

Grease

Graphite

Lord Oil


19) Cutting compound used during machining operation is …………..

Soluble Oil

Tarpin Oil

Water

Grease


20) Splash lubrication is done by …………….

Ring Lubricator

Grease Gun

Oil can

Pump Lubricator


 

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