Coast Guard Practice Exam

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Prepare for the Coast Guard Exam. Study with flashcards and multiple choice questions, all offering hints and explanations. Get exam-ready with comprehensive prep!

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Which time corresponds to 9:00 PM in the 24-hour clock?

2100
2200
2000
1900

The correct answer is: 2100

In the 24-hour clock system, the hours from 1:00 PM onward are converted by adding 12 to the standard hour notation. Therefore, to convert 9:00 PM, which is in the evening, you add 12 hours to the standard hour format. This results in 21:00 for 9:00 PM. The conversion follows this pattern: - 12:00 AM (midnight) is 00:00 in 24-hour time. - 1:00 AM is 01:00. - Continuing this way up to 11:00 AM (which is 11:00), noon is represented as 12:00. - From 1:00 PM onwards, 1:00 PM becomes 13:00, 2:00 PM becomes 14:00, and so forth until 11:00 PM, which is 23:00. Thus, at 9:00 PM, the correct conversion is 21:00, making it the accurate representation in the 24-hour clock system.