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Private Pilot Flashcards > Flight Instruments > Flashcards

Flight Instruments Flashcards

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Charter Pilot (Part 135) - Oral flashcards
1
Q

What are the 2 major components of the pitot-static system?

A

The Impact Pressure Chamber (Pitot Tube) and the Static Pressure Chamber (Static Port).

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2
Q

What does the pitot tube do?

A

It takes in the RAM air pressure or impact pressure.

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3
Q

What does the static port do?

A

It provides the reference source of ambient air pressure.

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4
Q

What instruments does the pitot/static system control?

A

The airspeed indicator, the vertical speed indicator and the altimeter.

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5
Q

What happens if the pitot tube gets blocked at a low altitude?

A

High pressure air will get trapped in it making the airspeed indicator read higher when you climb.

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6
Q

What happens if the pitot tube gets blocked at a higher altitude?

A

Low pressure air will get trapped in it making the airspeed indicator read lower when you descend.

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7
Q

What does the altimeter measure?

A

It measures the height above sea level.

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8
Q

How does the altimeter work?

A

It measures the ambient air pressure from the static port. The higher you fly, the less air pressure. Less air pressure is indicated by a higher altitude on the altimeter. Vice Versa.

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9
Q

How does the airspeed indicator work?

A

By measuring the dynamic pressure (movement). The pitot tube receives both dynamic and static air pressure. The static port receives static air pressure. The static air pressure cancels out in the airspeed indicator since both the pitot tube and static port are routed to it. Dynamic pressure is all that is left.

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10
Q

How does the vertical speed indicator work?

A

By measure the change in static pressure over time.

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11
Q

What type of airspeed is shown on the Airspeed Indicator?

A

Indicated Airspeed

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12
Q

What is calibrated airspeed?

A

It is the indicated airspeed corrected for installation and instrument errors.

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13
Q

What is true airspeed?

A

It is calibrated airspeed corrected for variations in temperature and pressure. Also defined as the actual airspeed relative to the air in which you are flying.

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14
Q

What does the white arc on the airspeed indicator represent?

A

It represents the flap operating range.

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15
Q

What does Vs0 represent?

A

The stalling speed in landing configuration when the flaps are down.

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16
Q

What does Vs1 represent?

A

The stalling speed in a clean configuration when the flaps are up.

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17
Q

What does Vfe represent?

A

The maximum speed with the flaps extended.

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18
Q

What does the green arc on the airspeed indicator represent?

A

The normal operating range of the aircraft.

19
Q

What does Vno represent?

A

The maximum speed of normal operations.

20
Q

What does the yellow arc on the airspeed indicator represent?

A

The caution range.

21
Q

What does the red Vne mark on the airspeed indicator represent?

A

The never exceed speed.

22
Q

What does Va represent?

A

Maneuvering speed.

23
Q

What does Vle represent?

A

Maximum landing gear extension speed.

24
Q

What does Vx represent?

A

The best angle-of-climb speed. The greatest altitude gain over a given distance. Used during a short-field takeoff to clear an obstacle.

25
Q

What does Vy represent.

A

The best rate-of-climb speed. Provides the most altitude gain in a given period of time.

26
Q

What does the Vertical Speed Indicator measure?

A

The rate of climb or descent in hundreds of feet per minutes.

27
Q

What does the altimeter indicate?

A

The height above mean sea level (MSL).

28
Q

Where do you set the barometric pressure on the altimeter?

A

The Kohlsman Window.

29
Q

What does the smallest hand on the altimeter represent?

A

10,000 feet

30
Q

What does the medium hand on the altimeter represent?

A

1,000 feet

31
Q

What does the biggest hand on the altimeter represent?

A

100 feet

32
Q

What is indicated altitude?

A

The altitude shown on the altimeter.

33
Q

What is true altitude?

A

The vertical distance of the aircraft above mean sea level (MSL).

34
Q

What is absolute altitude?

A

The vertical distance of the aircraft above ground level (AGL).

35
Q

What is pressure altitude?

A

The height above a standard datum plane (SDP) where the atmospheric pressure is 29.92” Hg.

36
Q

What is density altitude?

A

Pressure altitude corrected for non-standard temperatures.

37
Q

What do you obtain the pressure altitude in an airplane?

A

Set the altimeter setting to 29.92” Hg and read off the altitude.

38
Q

What two instruments are reliant on a vacuum pump in a non glass cockpit airplane?

A

The heading and attitude indicators.

39
Q

What powers the magnetic compass in an aircraft?

A

No external power is needed for the magnetic compass.

40
Q

What does the magnetic compass point towards?

A

The magnetic North.

41
Q

What are some magnetic compass errors?

A

Acceleration errors, Turning errors, variation and deviation.

42
Q

What is an acceleration error?

A

When flying east - west, the compass will swing North if you accelerate and swing South if you decelerate.

43
Q

What is a turning error?

A

When turning away from the North, the compass will lag behind the turn. When rolling out to a southern heading, the compass will lead ahead.

44
Q

What is variation with regards to the magnetic compass?

A

It is the difference between true and magnetic directions.

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