2.1 - Grade Resistance and Assistance
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Practice Questions
Test your understanding with targeted questions
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.
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.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the formula to calculate total rolling resistance?
💡 Hint: Identify which operation reflects the relationship between weight and resistance.
True or False: Grade assistance increases the tractive effort required.
💡 Hint: Consider the effects of gravity on moving machines.
1 more question available
Challenge Problems
Push your limits with advanced challenges
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.
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.
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