Machine lubrication and beyond.

Lubricant selection and lubrication management.

1. Which statement is untrue?
For running in of fresh surfaces the region near the BL-ML transition is favorable.
During running in the ML-transition line in the Stribeck curve shifts to the right.
Adding EP-additives to a base oil will shift the transition line in the transition diagram between region I/II and region II upwards.
EP additives are favorable when high contact temperatures may occur.

2. Which statement is untrue?
The oil viscosity decreases with increasing temperature.
The oil viscosity increases with increasing pressure.
The oil viscosity increases with increasing shear rate.
Above the so called solidification pressure the lubricant behaves like a solid.

3. Which statement is untrue?
VI improvers are used to decrease the viscosity-temperature dependency.
Dispersants keep insoluble contaminants dispersed in the lubricant.
Anti oxidants are added to protect metal surfaces from corrosion.
Demulsiefiers facilitate water separation from oil.

4. Which statement is untrue?
Biolubricants also termed Environmentally Acceptable lubricants have high biodegradability and low toxicity for plant, fish and wildlife.
Some biolubricants offer superior lubricity, extreme pressure and anti wear properties.
One of the base oils to formulate biolubricants are synthetic esters.
The total cost of using biolubricants is much higher compared to using mineral oils.

5. The viscosity reduction per 10 degrees Celsius of temperature increase of a synthetic SAE-10W30 oil is approximately.
5%
25%
50%
75%

1.	Which statement is untrue?
	For running in of fresh surfaces the region near the BL-ML transition is favorable.
	During running in the ML-transition line in the Stribeck curve shifts to the right.
	Adding EP-additives to a base oil will shift the transition line in the transition diagram between region I/II and region II upwards.
	EP additives are favorable when high contact temperatures may occur.

2.	Which statement is untrue?
	The oil viscosity decreases with increasing temperature.
	The oil viscosity increases with increasing pressure.
	The oil viscosity increases with increasing shear rate.
	Above the so called solidification pressure the lubricant behaves like a solid.

3.	Which statement is untrue?
	VI improvers are used to decrease the viscosity-temperature dependency.
	Dispersants keep insoluble contaminants dispersed in the lubricant.
	Anti oxidants are added to protect metal surfaces from corrosion.
	Demulsiefiers facilitate water separation from oil.

4.	Which statement is untrue?
	Biolubricants also termed Environmentally Acceptable lubricants have high biodegradability and low toxicity for plant, fish and wildlife.
	Some biolubricants offer superior lubricity, extreme pressure and anti wear properties.
	One of the base oils to formulate biolubricants are synthetic esters.
	The total cost of using biolubricants is much higher compared to using mineral oils.

5.	The viscosity reduction per 10 degrees Celsius of temperature increase of a synthetic SAE-10W30 oil is approximately.
	5%
	25%
	50%
	75%