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If a flight is made from an area of lower pressure into an area of high pressure without the altimeter setting being adjusted, the altimeter will indicate
If a flight is made from an area of lower pressure into an area of high pressure without the altimeter setting being adjusted, the altimeter will indicate
- The actual altitude above sea level
- Lower than the actual altitude above sea level (correct)
- Higher than the actual altitude above sea level
If a flight is made from an area of high pressure into an area of lower pressure without the altimeter setting being adjusted, the altimeter will indicate
If a flight is made from an area of high pressure into an area of lower pressure without the altimeter setting being adjusted, the altimeter will indicate
- The actual altitude above sea level
- Higher than the actual altitude above sea level (correct)
- Lower than the actual altitude above sea level
Which condition would cause the altimeter to indicate a lower altitude than true altitude?
Which condition would cause the altimeter to indicate a lower altitude than true altitude?
- Air temperature lower than standard
- Air temperature warmer than standard (correct)
- Atmospheric pressure lower than standard
Under what condition will true altitude be lower than indicated altitude?
Under what condition will true altitude be lower than indicated altitude?
How do variations in temperature affect the altimeter?
How do variations in temperature affect the altimeter?
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Study Notes
Altimeter Errors Overview
- Altimeter measures altitude based on atmospheric pressure; inaccurate settings can lead to incorrect altitude readings.
Lower to Higher Pressure Transition
- Flying from low to high pressure without adjusting the altimeter results in indicated altitude being lower than actual altitude.
Higher to Lower Pressure Transition
- Transitioning from high to low pressure without altitude adjustment causes the altimeter to show a higher than actual altitude.
Effects of Air Temperature on Altitude Indication
- Warmer air indicates a lower altitude than actually flown; altimeter shows lower altitude in warm conditions.
- Conversely, colder air results in the aircraft being lower than what the altimeter indicates; true altitude gets less than indicated altitude in cold air.
Temperature Variations and Altimeter Impact
- Higher temperatures cause pressure levels to expand, leading to indicated altitudes being higher than actual; remember the adage: "low to high, clear the sky."
- On warmer days, atmospheric pressure levels are raised compared to cooler days, resulting in a lower indication on the altimeter.
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