When 20,000 pounds (9072 kg) is loaded onto the frame of a truck it lowers by one-inch (25 mm) .However,another 30,000 pounds (13,608 kg) has to be added before it lowers another inch (25 mm) .Which of the following types of suspension is this truck likely to have?

A) pneumatic
B) standard leaf spring
C) progressive leaf spring
D) equalizing-beam

Question

Kenny Wright-Graham · Accepted Answer

Final Answer : C, Explanation :  This truck likely has a progressive leaf spring suspension because the amount of weight required to lower the truck an additional inch increases as more weight is added. Progressive leaf springs are designed to become stiffer as more load is applied, which is consistent with the scenario described.

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