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36: Know and Understand
What is the difference between a friction bearing and a non-friction bearing?
Why is oil viscosity important to an engine?
Give an example of kinetic energy and an example of potential energy.
Explain why preventive maintenance is considered a variable cost.
Describe a “total energy” scenario in an agricultural application. Use at least three types of energy in your description.
Wheel _____ occurs when tires do not have traction.
Explain rolling resistance.
A hydrometer is a tool that is used to measure the _____.
A. specific gravity and strength of a coolant
B. airflow around an air-cooled engine
C. viscosity of engine oil
D. efficiency of an air cleaner filter element
Explain the difference between variable costs and fixed costs.
Explain why clean engine oil and long engine life depend on an efficient air filter and a leak-free air cleaner system.
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