Ground School Exam #2 UPDATED
ACTUAL Exam Questions and CORRECT
Answers
What is a Pitot Static System? - CORRECT ANSWER - Uses static air and dynamic
pressure both of these are used for the operation of airspeed indicator. There is an opening in the
front of the tube that allows both pressures to enter and a smaller tube in the back to allow for
moisture to drain from the system.
Static air is always present whether aircraft is moving or at rest.
Dynamic pressure is only present when an aircraft is in motion.
What is the air speed indicator? - CORRECT ANSWER - It is the speed indicated based
on the dynamic pressure. There is static pressure delivered to both sides of the tube which
cancels out static pressure and leaving dynamic to be displayed on instrument.
What two flight instruments use static pressure? - CORRECT ANSWER - Altimeter and
VSI
What happens if the primary static source becomes blocked? - CORRECT ANSWER -
There is a secondary system found in the flight deck and due to the venturi effect the air flowing
around the fuselage the air pressure inside the flight deck is lower than exterior pressure.
As a result the altimeter indicated a higher altitude, airspeed, and the VSI shows a momentary
climb then becomes stable
What is the altimeter? - CORRECT ANSWER - Measures the height of an aircraft above
given pressure level. The system itself is made up of aneroid wafers and when the static pressure
is higher static pressure presses down on the wafers and causes them to collapse. A lower static
pressure allows for the wafers to expand. Decrease in pressure is the needle decreasing and an
expansion of wafers into increase altitude.
, What happens when an aircraft travels from high pressure to lower pressure without the
adjustment to the altimeter? - CORRECT ANSWER - The constant altitude will be
displayed but the actual height of the aircraft above the ground would be lower then the indicated
altitude.
"Going from a high to low, Look out below"
What happens when operating in temps colder than standard? - CORRECT ANSWER -
The altitude is lower than the altimeter indication.
"From Hot to Cold, Look out below"
1 in of pressure is equal to approx 1,000 feet - CORRECT ANSWER - Find the difference
btwn pressures (org altimeter setting - current altimeter setting) and multiple by 1,000. Take that
number and subtract from indicated altitude.
What is indicated altitude? - CORRECT ANSWER - Read directly from the altimeter
(uncorrected) when it is set to the current altimeter setting
What is true altitude? - CORRECT ANSWER - The vertical distance of the aircraft above
sea level- the actual altitude. Expressed as feet above mean sea level (MSL). Altitude displayed
on airport terrain
What is absolute altitude? - CORRECT ANSWER - The vertical distance of an aircraft
above the terrain (AGL)
What is pressure altitude? - CORRECT ANSWER - Altitude indicated when altimeter is
adjusted to 29.92 Hg. This is above standard datum plane.
ACTUAL Exam Questions and CORRECT
Answers
What is a Pitot Static System? - CORRECT ANSWER - Uses static air and dynamic
pressure both of these are used for the operation of airspeed indicator. There is an opening in the
front of the tube that allows both pressures to enter and a smaller tube in the back to allow for
moisture to drain from the system.
Static air is always present whether aircraft is moving or at rest.
Dynamic pressure is only present when an aircraft is in motion.
What is the air speed indicator? - CORRECT ANSWER - It is the speed indicated based
on the dynamic pressure. There is static pressure delivered to both sides of the tube which
cancels out static pressure and leaving dynamic to be displayed on instrument.
What two flight instruments use static pressure? - CORRECT ANSWER - Altimeter and
VSI
What happens if the primary static source becomes blocked? - CORRECT ANSWER -
There is a secondary system found in the flight deck and due to the venturi effect the air flowing
around the fuselage the air pressure inside the flight deck is lower than exterior pressure.
As a result the altimeter indicated a higher altitude, airspeed, and the VSI shows a momentary
climb then becomes stable
What is the altimeter? - CORRECT ANSWER - Measures the height of an aircraft above
given pressure level. The system itself is made up of aneroid wafers and when the static pressure
is higher static pressure presses down on the wafers and causes them to collapse. A lower static
pressure allows for the wafers to expand. Decrease in pressure is the needle decreasing and an
expansion of wafers into increase altitude.
, What happens when an aircraft travels from high pressure to lower pressure without the
adjustment to the altimeter? - CORRECT ANSWER - The constant altitude will be
displayed but the actual height of the aircraft above the ground would be lower then the indicated
altitude.
"Going from a high to low, Look out below"
What happens when operating in temps colder than standard? - CORRECT ANSWER -
The altitude is lower than the altimeter indication.
"From Hot to Cold, Look out below"
1 in of pressure is equal to approx 1,000 feet - CORRECT ANSWER - Find the difference
btwn pressures (org altimeter setting - current altimeter setting) and multiple by 1,000. Take that
number and subtract from indicated altitude.
What is indicated altitude? - CORRECT ANSWER - Read directly from the altimeter
(uncorrected) when it is set to the current altimeter setting
What is true altitude? - CORRECT ANSWER - The vertical distance of the aircraft above
sea level- the actual altitude. Expressed as feet above mean sea level (MSL). Altitude displayed
on airport terrain
What is absolute altitude? - CORRECT ANSWER - The vertical distance of an aircraft
above the terrain (AGL)
What is pressure altitude? - CORRECT ANSWER - Altitude indicated when altimeter is
adjusted to 29.92 Hg. This is above standard datum plane.
