Question 737 Deck Safety
70% to passAmbient air, which you normally breathe, contains what percent of oxygen?
A
6%
B
10%
C
15%
D
21%
AI Explanation
The correct answer is D) 21%. Ambient air, which is the air we normally breathe, contains approximately 21% oxygen. This is the standard composition of dry air at sea level, as defined by the International Union of Pure and Applied Chemistry (IUPAC) and other regulatory bodies. The other options are incorrect because they do not accurately reflect the typical oxygen content in ambient air.
Related Questions
Q123:Who is responsible for transmitting a message stating that distress communicatio...
Q1247:While reading the muster list you see that "3 short blasts on the whistle and 3 ...
Q988:As seen in illustration D039SA below a locker with additional protective clothin...
Q2003:The geometric center of the underwater volume is known as the _______________.
Q1135:In illustration D014SA below, which item number correctly identifies the externa...
Ready to test your knowledge?
Take a Deck Safety Practice ExamOfficial Resources
Pass Your Coast Guard Licensing Exams!
Study offline, track your progress, and simulate real exams with the Coast Guard Exams app