Practice Grade Resistance and Assistance - 2.1 | Overview 72 | Construction Engineering & Management - Vol 1
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Knowledge

2.1 - Grade Resistance and Assistance

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

Calculate the rolling resistance for a machine weighing 30 tons with a rolling resistance of 25 kg per ton.

💡 Hint: Use the formula: Total Rolling Resistance = Gross Weight × Rolling Resistance Value.

Question 2

Easy

What is grade resistance for a slope of 3% for a machine weighing 10 tons?

💡 Hint: Remember, 1% of grade equals 10 kg per ton.

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 is the formula to calculate total rolling resistance?

  • Total Rolling Resistance = Weight × Resistance Value
  • Total Rolling Resistance = Weight + Resistance Value
  • Total Rolling Resistance = Weight - Resistance Value

💡 Hint: Identify which operation reflects the relationship between weight and resistance.

Question 2

True or False: Grade assistance increases the tractive effort required.

  • True
  • False

💡 Hint: Consider the effects of gravity on moving machines.

Solve 1 more question and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

A construction site requires a bulldozer that weighs 40 tons with a rolling resistance of 50 kg per ton. It needs to operate on a slope of 8%. Calculate the total resistance and how much power will be available if the maximum tractive effort is 6000 kg.

💡 Hint: Follow the steps for calculating rolling and grade resistance and subtract from total power.

Question 2

Evaluate how operating at a high altitude affects the usable power of a machine with otherwise specified ratings. What considerations should be made when specifying equipment for such conditions?

💡 Hint: Reflect on how altitude could influence machine efficiency.

Challenge and get performance evaluation