CMRT CMRT Lubrication and Tribology

Question 1

What does the term 'tribology' refer to in the context of maintenance?

Accepted Answer

The study of friction, wear, and lubrication between interacting surfaces

Answer

The measurement of vibration in rotating equipment

Answer

The analysis of corrosion in metal components

Answer

The process of aligning rotating shafts

Question 2

Which lubrication regime occurs when the lubricant film fully separates the two mating surfaces?

Accepted Answer

Hydrodynamic (full-film) lubrication

Answer

Boundary lubrication

Answer

Mixed lubrication

Answer

Elasto-hydrodynamic lubrication

Question 3

What does the viscosity index (VI) of an oil indicate?

Accepted Answer

How much the oil's viscosity changes with temperature

Answer

The oil's resistance to oxidation over time

Answer

The oil's ability to prevent rust and corrosion

Answer

The load-carrying capacity of the oil

Question 4

Which type of grease thickener is most commonly used in industrial bearings due to its high temperature and water-resistance properties?

Accepted Answer

Lithium soap

Answer

Calcium soap

Answer

Sodium soap

Answer

Aluminum complex soap

Question 5

What does ISO VG 46 mean on a hydraulic oil label?

Accepted Answer

The oil has a nominal kinematic viscosity of 46 cSt at 40°C

Answer

The oil has 46% additive content by volume

Answer

The oil meets ISO standard 46 for oxidation resistance

Answer

The oil contains 46 viscosity index improvers

Question 6

What is the purpose of an oil analysis program in a reliability maintenance strategy?

Accepted Answer

To detect contamination, wear metals, and degradation trends before failure occurs

Answer

To determine when to change the oil based solely on operating hours

Answer

To verify that the correct oil grade was ordered from the supplier

Answer

To measure the oil's color and odor for quality assurance