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Question

Difficulty: MediumIdentifying Implied Meanings

Passage:
During high-rate equalization charging of submarine lead-acid battery banks, ventilation exhaust blowers are continuously operated at maximum capacity to maintain atmospheric hydrogen concentrations strictly below four percent. If an exhaust duct damper fails to open during the charging cycle, technicians are instructed to immediately disconnect the charging current rather than merely reducing electrical power.

Statement: The passage implies that accumulating hydrogen gas generated during battery charging presents a serious combustion hazard.

Answer: Answer

Answer

True
The author outlines urgent safety actions—running exhaust blowers at maximum capacity to hold gas levels below four percent and immediately cutting power if an exhaust damper fails. These strict measures directly support the logical conclusion that hydrogen buildup creates a dangerous fire or explosion risk.

Step-by-Step Solution

1
Identify key facts and operational rules presented in the passage.
Technicians must keep hydrogen below four percent using maximum blower capacity and must completely stop charging current if exhaust flow is compromised.
Establishing the explicit constraints reveals the operational concern driving the procedure.
2
Deduce the unstated physical risk that necessitates an immediate full shutdown rather than a simple reduction in power.
The requirement for absolute containment below a specific percentage and zero tolerance for ventilation loss implies that exceeding this threshold creates an immediate danger such as fire or explosion.
Inferences must bridge explicit cause-and-effect rules to their underlying logical rationale.
3
Evaluate the statement against the deduced implication.
The statement accurately reflects the unstated hazard implied by the text.
Confirms that the claim is a valid, supported inference.

Key Concept

Deducing unstated operational risks and implied rationales from explicit safety protocols.
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Identifying Implied Meanings

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