190202c Lubrication Systems And Crankcase Ventilation Flashcards
What are the five functions of engine oil
Reduce wear, clean internal engine components, seal mating surfaces, absorb heat, reduce oxidization. Also reduces noise
What’s the definition of viscosity
Viscosity is a measurement relating to an oils resistance to flow. Thicker and colder oils generally have a higher viscosity
The term viscosity index refers to the rate the oil will change viscosity as the temperature changes. Would oil with a high viscosity index experience smaller changes in viscosity. Yes or no
Yes
The poor point of oil is determined by a special test. What angle is the test tube of oil moved to?
45°
What are couple of reasons why different additives may be added to engine oils
Engine operating conditions or fuel quality
Study the shit out of the motor oil guide handout page
Too much info to list here
What are four functions of an oil analysis program
To determine the condition of the oil, to detect potential component failures, to confirm existing problems, to adjust oil and filter change intervals
The oil analysis program is part of an overall preventative maintenance program. True or false
True
What’s the most common oil lubrication system used on mobile equipment
The full pressure system is the most common
What’s the purpose of the engine crankcase
The crankcase and oil pan function as the storage reservoir for the lubricating oil. The oil pan also helps cool the oil by contact with the passing airflow
What are three main oil indicators or gauges used on a majority of engines
Level, pressure and temperature
What’s the purpose of oil scavenging pumps
They are able to pick oil from the extreme ends of the oil pan during periods of high angle operation. Separate sumps are typically provided in the oil pan design for the scavenging pump intake suction screens
What’s the purpose of the pressure regulating valve
It prevents oil pressure from rising above a predetermined value
What’s the purpose of the relief valve
The relief valve opens if system pressure is extreme
Oil to coolant type of oil coolers are designed to do what
All oil coolers are designed to do just that. Lower the temperature of the oil