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3 cards from this section. Quick, good the night before a test.
Define rolling resistance.
Think about the friction created when a wheel rolls.
What is grade resistance?
Consider slopes when a vehicle moves uphill.
What two types of resistance must be overcome for effective machine operation?
Consider the surfaces and slopes that machines operate on.
True or False: Rolling resistance decreases as the speed of the machine increases.
Think about what rolling resistance actually measures.
A 25-ton excavator with a rolling resistance of 50 kg per ton is moving on a gravel road. It encounters a grade resistance of 450 kg due to a 10-degree slope. Calculate the total tractive effort required.
Don’t forget to account for both rolling and grade resistance!
Discuss how different industrial scenarios might influence the selection of machinery based on power requirements. Use examples from construction, mining, and agricultural operations.
Consider how job sites differ in terms of terrain and material.
4 more questions in this section. Enroll free to practise them all.
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