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
