Final answer:
To determine pressure altitude, adjust the altimeter reading by 10 feet for every 0.01" Hg it differs from 29.92" Hg. In this case, the correct pressure altitude is 2,650 ft, option c).
Step-by-step explanation:
The student is seeking to determine their pressure altitude when their altimeter is set to 29.27" Hg and reads 2,000 ft. Pressure altitude is the height above a standard datum plane (usually 29.92 inches of mercury), and can be calculated by finding the difference in altitude for every 0.01 inch of mercury the altimeter setting is off from the standard. For each 0.01 inch off from 29.92, the altitude is off by 10 feet. In this case, 29.27" Hg is 0.65 inches of mercury less than 29.92" Hg, which represents our standard atmosphere.
Knowing this, we can calculate the difference: 0.65 inches * 100 = 65, and then multiply by 10 feet for each 0.01 inch to get an altitude difference of 650 feet. Therefore, if the altimeter reads 2,000 ft, we need to adjust this reading by 650 feet to get the pressure altitude. Since 29.27" Hg is less than the standard, we must add this value to 2,000 ft to get the pressure altitude.
The pressure altitude is therefore 2,000 ft + 650 ft, which equals 2,650 feet. The correct answer for the student's question is c) 2,650 feet.