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Workshop Calculation and Science Practice Test: Friction
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Workshop Calculation and Science Practice Test: Friction
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25 Questions

1. Which lubrication system employs oil holes in the machines?
2. Rolling friction is smaller than?
3. Friction can be increased by
4. A cubical block rests on an inclined plane of μ = 1/√3, determine the angle of inclination when the block just slides down the inclined plane
5. Which lubrication system is provided with a ring oiler to splash lub-oil continuously around the parts?
6. What does happen to coefficient of friction when weight of body is doubled
7. What is the angle of inclination if a weight of 150 kg is in equilibrium and the value of m is 0.5773?
8. When the two surfaces in contact have a very thin layer of lubricant in between them, it is known as
9. What is the co-efficient of friction if a force of 30 N is required to move a body of mass 35 kg (Assume 1kg=10N)?
10. Which of the angle is called angle of friction?
11. Frictional force between two stationary surfaces is called______ friction
12. How much work will be done in moving a 10 kg object residing on a horizontal plane through a distance of 10 meter (assume m= 0.15)?
13. Lubricants ________
14. What type of lubricant is used in wick feed lubrication system?
15. The value of Normal reaction (R) for the following figure is
16. On what force of friction depends?
17. Which is depends on the frictional force?
18. The force of friction is maximum when the surface
19. Which symbol is used to denote co-efficient of friction?
20. How much force is required to just slide a 20 kg object lying on a horizontal table if the m is 0.2?
21. Which formula is used to calculate angle of static friction (Φs)?
22. The coefficient of static friction is ___________
23. Limiting frictional force is________ as compared to applied external force.
24. How much will be the weight of a body which will be moved by a horizontal force of 50 kg against a frictional resistance of 0.25?
25. Which one of these characteristics does a smooth surface has?

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