To maintain emergency power reliability, critical facilities store large reserves of diesel fuel in underground tanks. Over time, ambient temperature changes cause condensation to collect along tank walls, sinking beneath the lighter fuel. Microorganisms thrive in this water layer, creating acidic sludge that corrodes tank bottoms and clogs engine fuel injectors. Facility technicians regularly pump stagnant liquid from the absolute bottom of storage tanks rather than drawing from the fuel supply lines situated several inches higher.
Based on the passage, which of the following is implied about why technicians pump liquid from the bottom of the tank?
- The liquid at the bottom contains the harmful water and sludge layer rather than usable fuel.Cevap
- BPumping liquid from the bottom prevents ambient temperature changes from affecting the underground facility.
- CDrawing liquid from the base is the primary method used to supply diesel fuel directly to emergency power generators.
- DPumping stagnant liquid elevates the fuel supply lines to a higher position inside the tank.
Cevap
The liquid at the bottom contains the harmful water and sludge layer rather than usable fuel.
The passage establishes that dense water sinks below fuel and creates a sludge layer at the bottom of the tank. By contrasting the bottom pump with the higher fuel supply lines, the text implies that pumping the absolute bottom is done to remove this contaminated water and sludge before it enters the engine system.
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Anahtar Kavram
Inferring unstated operational purposes from textual cause-and-effect relationships