Practice Power Requirements of Machines - 7.2 | Getting Started 14 | Construction Engineering & Management - Vol 1
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Knowledge

7.2 - Power Requirements of Machines

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

Define rolling resistance.

💡 Hint: Think about the friction created when a wheel rolls.

Question 2

Easy

What is grade resistance?

💡 Hint: Consider slopes when a vehicle moves uphill.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What two types of resistance must be overcome for effective machine operation?

  • Wind resistance and water resistance
  • Rolling resistance and grade resistance
  • Friction resistance and inertia resistance

💡 Hint: Consider the surfaces and slopes that machines operate on.

Question 2

True or False: Rolling resistance decreases as the speed of the machine increases.

  • True
  • False

💡 Hint: Think about what rolling resistance actually measures.

Solve and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

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.

💡 Hint: Don’t forget to account for both rolling and grade resistance!

Question 2

Discuss how different industrial scenarios might influence the selection of machinery based on power requirements. Use examples from construction, mining, and agricultural operations.

💡 Hint: Consider how job sites differ in terms of terrain and material.

Challenge and get performance evaluation