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Zorluk: OrtaDistinguishing Supported and Unsupported Inferences

Read the passage below:

Tactical ground vehicles equipped with ceramic Diesel Particulate Filters (DPFs) capture unburned soot particles to comply with thermal and emission standards. During prolonged low-speed operations, exhaust gas temperatures remain insufficient to ignite and clear the accumulated soot passively. To prevent excessive engine backpressure and filter blockage, the engine control unit initiates active regeneration by injecting supplemental fuel into the exhaust stream. This process raises internal exhaust temperatures above 600°C, oxidizing the trapped soot into ash. However, repeatedly interrupting this regeneration cycle by turning off the engine prematurely allows unburned fuel vapors to condense on the filter matrix, progressively degrading filtration efficiency.

True or False: It can be reasonably inferred from the passage that operating a tactical vehicle primarily at low speeds increases the vehicle's reliance on active regeneration to maintain exhaust flow.

Cevap: Cevap

Cevap

True
The conclusion is fully supported by the text. The passage states that low-speed driving fails to generate enough heat for passive soot burning, and active regeneration is explicitly triggered to prevent soot buildup and backpressure under these conditions. Thus, operating primarily at low speeds necessitates greater reliance on active regeneration.

Adım Adım Çözüm

1
Identify the conditions of low-speed operation described in the passage.
The passage states that during prolonged low-speed operations, exhaust temperatures are insufficient to ignite and burn off soot passively.
Establishing the baseline behavior during low-speed driving identifies whether passive soot clearing can take place.
2
Analyze the stated mechanism for preventing blockage when passive burning cannot occur.
The text states that active regeneration is initiated specifically to prevent excessive backpressure and filter blockage by raising exhaust heat with supplemental fuel.
Connecting the lack of passive clearing to the trigger for active regeneration demonstrates the system's operational dependency.
3
Evaluate whether the inference in the statement logically follows from the textual evidence.
Because low speeds fail to generate necessary passive heat, the vehicle must rely on active regeneration to keep filters clear and exhaust flowing properly.
A supported inference is a logical deduction strictly grounded in the passage without relying on unstated assumptions.

Anahtar Kavram

Distinguishing Supported and Unsupported Inferences
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