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Assuming that all other variables remain constant, what effect does a decrease in temperature have on atmospheric pressure?
Atmospheric pressure decreases
Which flight instruments are dependent on the pitot-static system?
The airspeed indicator, vertical speed indicator, and altimeter.
The pitot system relies on what type of wind to operate?
Relative
Which color arc on the airspeed indicator indicates the speed range in which you will fly most of the time?
Green
What is the V-speed for the maximum structural cruising speed?
VNO
What corrections are applied to calibrated airspeed to determine true airspeed?
Altitude and temperatures
Below what altitude do some altimeters display a crosshatched area?
10,000 feet MSL
What type of altitude does the altimeter display?
Indicated
What is one of the common situations that would give a false altimeter indication?
Failing to keep the altimeter set
What is the most common altimeter error?
A failure to keep the altimeter set to the local altimeter setting
When you fly into an area of higher pressure and the aircraft's altimeter setting is set lower than the local altimeter setting
True altitude will be higher than indicated altitude
When you fly in an area of warmer temperature and you have not adjusted the altimeter setting
Your aircraft's true altitude will be higher than indicated altitude.
The VSI displays a rate of climb or descent in what unit of measure?
Feet per minute
What usually indicates a blocked pitot tube, static port, or both?
Incorrect pitot-static instrument readings
If the pitot tube and its associated drain hole become completely blocked but the static system remains open, what happens to the airspeed indication?
The airspeed indication will vary as altitude changes.
What can cause the airspeed indicator to operate inaccurately?
The static system is blocked but the pitot tube is clear.
Where does the spinning gyro display the aircraft movement that it senses?
Instrument face
What is meant by rigidity in space?
The principle that a wheel with a heavily weighted rim spun rapidly will remain in a fixed position in the plane in which it is spinning
What does precession cause?
Slow instrument drifting and minor erroneous indications
The turn coordinator shows two basic indications, the turn indication and the
Quality of turn
How do you correct a slip or skid?
Center the ball by varying the angle of bank or applying rudder pressure, or a combination of both actions.
What should you cross check to confirm a failed attitude indicator?
Cross check the attitude with outside visual references and other flight instruments.
What is another name for the heading indicator?
Directional Gyro
How would a heading of 200 degrees be displayed?
20
What two power sources do gyroscopic instruments typically use?
Electrical and vacuum
What is the magnetic compass aligned with?
The permanent magnetic field surrounding the earth
The compass lubber line is the vertical mark that indicates the
Heading
The angular difference between true north and magnetic north is
Magnetic variation
What is the primary cause of magnetic compass deviation?
Errors from metals and electrical accessories within the aircraft
When is the magnetic compass most accurate?
When your aircraft is in straight-and level, unaccelerated flight in smooth air
What is the primary cause of magnetic dip?
Compass needle trying to dip toward the magnetic poles
Acceleration and deceleration errors are fluctuations in the compass during changes in
Speed
No turning errors occur when you fly near the
Equator
On a digital display, the turn coordinator is combined with the
Attitude indicator
Where is true airspeed displayed on a digital airspeed indicator?
In a box at the bottom of the airspeed display
Where does the barometric setting appear on a digital altimeter?
Bottom box
What is the minimum climb or descent rate that the digital vertical speed indicator pointer displays?
100 feet per minute
In a digital display, what symbol replaces the miniature airplane in an analog attitude indicator?
A delta, or inverted V
What analog instrument feature is combined with the turn coordinator in a digital display?
Attitude indicator roll pointer
What digital instrument corresponds to the analog heading indicator?
Horizontal Situation Indicator
What is the barometric pressure and temperature for a standard ISA atmosphere at sea level?
Barometric pressure = 29.92 in. Hg. (1013.2 mb); temperature = 15°C (59°F).
Which of these V-speeds is not marked on the airspeed indicator?
VA
What does AGL refer to?
Height above the ground
How do pressure variations affect true altitude?
In areas of higher pressure, indicated altitude is lower than true altitude.
Which instrument would continually indicate zero when a static system blockage occurs?
Vertical Speed Indicator
What component of the gyroscope enables it to rotate freely in any direction as the aircraft moves?
Gimbal rings
What are the two basic components of the turn coordinator?
Indicator and inclinometer
The attitude indicator senses movement about the aircraft's
Longitudinal and lateral axes.
What is the purpose of the heading indicator?
It is the primary source of heading information.
What is the purpose of a magnetic compass?
Provides magnetic heading information
What is the primary difference in turn errors between the northern and southern hemispheres?
The leads and lags are in the opposite direction in each hemisphere
What do the various color-codes represent on a digital airspeed indicator?
Various airspeed limitations
What do the outriggers on the digital attitude indicator represent?
Wingtips
How frequently do you have to adjust the horizontal situation indicator?
Never
What replaces the ball on a digital turn coordinator?
Trapezoid