NEW
Font size
S
M
L
XL
WorksheetsLubrication Regime
Total questions: 8
Worksheet time: 4mins
Name
Class
Date
1.
The purpose of lubrication is
a)
To reduce friction.
b)
Transfer heat produced.
c)
To reduce wear.
d)
All of above.
2.
Which of the following is NOT a function of lubricant in IC engine?
a)
Form a film to separate the surfaces.
b)
Withstand high temperature inside the cylinder.
c)
Adhere to surface.
d)
Reduce the size of the asperities and improve the surface finish.
3.
Synovial fluid is a lubricant that is found in
a)
Human bone joints.
b)
IC engines.
c)
Gearboxes.
d)
Rolling element bearings.
4.
Which one of them is a correct combination?
a)
1-(i), 2-(iv), 3-(ii), 4-(iii).
b)
2-(i), 3-(iv), 4-(iii), 1-(ii).
c)
1-(iv), 3-(iii), 2-(i), 4-(ii).
d)
3-(iv), 2-(iii), 1-(i), 4-(ii).
5.
As the temperature is increased, the coefficient of friction
a)
Increases.
b)
Remains unchanged.
c)
Reduces.
d)
Increase or decrease based on the lubrication regime.
6.
Which of the following is a desirable property of boundary lubricant?
a)
Dissolvability in lubricating oils.
b)
Low shear strength and high melting point.
c)
Affinity to metallic surfaces.
d)
All of above.
7.
In hydrodynamic lubrication the major source of friction is
a)
Shearing of lubricant film.
b)
Abrasion of tribo-surfaces due to free particles.
c)
Abrasion due to asperities on tribo-surfaces
d)
All of the above.
8.
Film thickness in elastohydrodynamic lubrication depends on
a)
Applied load and relative velocity
b)
Lubricant properties.
c)
Properties of contacting materials
d)
All of above.
Reset
