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Question

Difficulty: EasyDirect Fact Retrieval

Read the following technical passage and fill in the blank to complete the statement based strictly on the provided text:

During pre-mission staging for night navigation exercises, soldiers must verify the condition of their standard lensatic compass. The luminous dial markings require exposure to direct light for at least three minutes to ensure adequate luminescence in complete darkness. In addition, the floating dial must rotate smoothly without sticking when the compass cover is opened beyond forty-five degrees.

Answer:To ensure adequate luminescence in complete darkness, the luminous dial markings must be exposed to direct light for a minimum of 【three】 minutes.

Answer

three (or 3)
The passage explicitly states that the luminous dial markings require exposure to direct light for at least three minutes to ensure adequate luminescence in complete darkness.

Step-by-Step Solution

1
Scan the passage for keywords related to the question prompt, such as 'luminous dial markings', 'exposure to direct light', and 'minutes'.
Located the sentence: 'The luminous dial markings require exposure to direct light for at least three minutes to ensure adequate luminescence in complete darkness.'
Direct fact retrieval requires locating the exact sentence containing the target information.
2
Extract the specific numerical value and time measurement stated in the text.
Identified the duration as 'three' minutes.
The blank specifically requests the number of minutes required for exposure.

Key Concept

Direct Fact Retrieval from technical passage
Estimated Time:45s
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Topics

Direct Fact Retrieval

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