Question 1122Navigation General

70% to pass

The needle of an aneroid barometer points to 30.05 on the dial. This indicates that the barometric pressure is _______________.

A 30.05 inches of mercury
B falling
C 30.05 millimeters of mercury
D 30.05 millibars
AI Explanation

The correct answer is A) 30.05 inches of mercury. The needle of an aneroid barometer directly indicates the barometric pressure in inches of mercury. When the needle points to 30.05 on the dial, this means the current barometric pressure is 30.05 inches of mercury. The other options are incorrect because: B) "falling" does not describe the pressure value, only the trend. C) 30.05 millimeters of mercury is a different unit of measurement. D) 30.05 millibars is also a different unit of measurement, not the one used for aneroid barometers.

Related Questions
Q1398:The proper way to approach a downstream lock where there is an outdraft is to be... Q300:The navigation regulations applicable to a U.S. inland waterway can be found in ... Q1906:For navigational purposes, each great circle on the Earth has a length of ______... Q1105:In the Northern Hemisphere, your vessel is believed to be in the direct path of ... Q230:What is NOT true concerning color sectors of lights?

Ready to test your knowledge?

Take a Navigation General Practice Exam
Official Resources
USCG Navigation Rules (COLREGS) 33 CFR Navigation Rules USCG National Maritime Center
← Previous All Questions Next →

Want to practice with timed exams?

Download Coast Guard Exams for the full exam experience.

App Store