2.7 Altimeter Errors

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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

a) the actual altitude above sea level.
b) higher than the actual altitude above sea level
c) lower than the actual altitude above sea level.

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C : When the an altimeter setting is at a lower value than the correct setting, the altimeter is indicating less than it should and thus would be showing lower 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

a) lower than the actual altitude above sea level
b) higher than the actual altitude above sea level
c) the actual altitude above sea level

B : When flying from higher pressure to lower pressure without adjusting your altimeter, the altimeter will indicate a higher than actual altitude. As you adjust an altimeter barometric setting lower, the altimeter indicates lower.

Which Condition would cause the altimeter to indicate a lower altitude than true altitude?

a) Air temperature lower than standard
b) Atmospheric pressure lower than standard
c) Air temperature warmer than standard

C) In air that is warmer than standard temperature, the airplane will be higher than the altimeter indicates. Said another way, the altimeter will indicate a lower altitude than actually flown.

Under what condition will true altitude be lower than indicated altitude?

a) In colder than standard air temperature
b) In warmer than standard air temperature
c) When density altitude is higher than indicated altitude

A : The airplane will be lower than the altimeter indicates when flying in air that is colder than standard temperature. Remember that altimeter readings are adjusted for changes in barometric pressure but not for changes in temperature. When one flies from warmer to cold air and keeps a constant indicated altitude at a constant altimeter setting, the plane has actually descended.

How do variations in temperature affect the altimeter?

a) Pressure levels are raised on warm days and the indicated altitude is lower than true altitude
b) Higher temperatures expand the pressure levels and the indicated altitude is higher than true altitude.
c) Lower temperatures lower the pressure levels and the indicated altitude is lower than true altitude.

A : On Warm days, the atmospheric pressure levels are higher than on cold days. Your altimeter will indicate a lower than true altitude. Remember, "low to high, clear the sky"