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WEATHER > WIND SHEAR > Flashcards

WIND SHEAR Flashcards

1
Q

Which is a definition of “severe wind shear”

A

Any rapid change in wind direction or velocity which causes airspeed changes greater that 500 ft/min

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2
Q

In comparison to an approach in a moderate headwind, which is an indication of a possible wind shear due to a decreasing headwind when descending on the glide slope

A

Higher pitch attitude is required

Which INITIAL cockpit indications should a pilot be aware of when a headwind shears to a calm wind
Indicated airspeed decreases aircraft pitches down and altitude decreases

Which condition would INITIALLY cause the indicated airspeed and pitch to increase and sink rate to decrease?
Sudden increase in a headwind component

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3
Q

Which INITIAL cockpit indications should a pilot be aware of when a headwind shears to a calm wind

A

Indicated airspeed decreases aircraft pitches down and altitude decreases

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4
Q

Which condition would INITIALLY cause the indicated airspeed and pitch to increase and sink rate to decrease?

A

Sudden increase in a headwind component

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5
Q

Which INITIAL cockpit indications should a pilot be aware of when a constant tailwind shears to a calm wind

A

Altitude pitch and indicated airspeed

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6
Q

Which wind shear condition results in a loss of airspeed

A

Decreasing headwind and increasing tailwind

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7
Q

WHich wind shear condition results in a an increase in airspeed

A

Decreasing tailwind and increasing headwind

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8
Q

Which airplane performance characteristics should be recognized during takeoff when encountering a tailwind shear that increases in intensity

A

Loss of or diminished airspeed performance

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9
Q

Thrust being managed to maintain desired indicated airspeed and the glide slope is being flown. Which characteristics should be observed when a tailwind shears to a constant headwind?

A

PITCH ATTITUDE increases VERTICAL SPEED decreases INDICATED AIRSPEED increases then decreases

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10
Q

WHat is an important characteristic of wind shear

A

It may be associated with either a wind shift or a windspeed gradient at any level in the atmosphere

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11
Q

Where can the maximum hazard zone caused by windshear associated with a thunderstorm be found

A

On all sides and directly under the thunderstorm cell

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12
Q

Which is a necessary condition for the occurrence of a low-level temperature inversion wind shear

A

A calm or light wind near the surface and a relatively strong wind just above the inversion

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13
Q

The horizontal wind shear critical for turbulence (moderate or greater)

A

per 150 miles is

greater than 18 KTS

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14
Q

What is the expected duration of an individual microburst

A

Seldom longer than 15 minutes from the time the burst strikes the ground until dissipation

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15
Q

Maximum down drafts in a microburst encounter may be as strong as

A

6000 ft/min

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16
Q

Maximum downdrafts in a microburst encounter are strong and may include horizontal winds near the surface as strong as

A

45 KTS

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17
Q

An aircraft that encounters a headwind of 40 KTS within a microburst may expect a total shear across the microburst of

A

80 KTS

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18
Q

Doppler wind measurements indicate that the windspeed change a pilot may expect when flying through the peak intensity of a microburst is approximately

A

45 KTS

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19
Q

Maximum downdrafts in a microburst encounter may be as strong as

A

6000 ft/min

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20
Q

An aircraft that encounters a headwind of 45 KTS within a microburst may expect a total shear across the microburst of

A

90 KTS

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21
Q

What information from the control tower is indicated by the following transmission SOUTH BOUNDARY WIND ONE SIX ZERO AT TWO FIVE WEST BOUNDARY WIND TWO FOUR ZERO AT THREE FIVE

A

THere is a possibility of wind shear over or near the airport

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22
Q

What is the recommended technique to counter the loss of airspeed and resultant lift from wind shear

A

Maintain or increase pitch attitude and accept the lower than normal airspeed indications

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23
Q

What are the characteristics of an increasing headwind shear?

A

IAS Increases and Ground speed decreases

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24
Q

What are the characteristics of an increasing tailwind shear?

A

KIAS decreases, Ground speed increases.

25
Q

You are flying a stabilized, visual approach at 150 KIAS on glide path. Without changing pitch or power, you start going low on glide path and your airspeed changes to 160 KIAS. Which condition have you encountered?

A

Increasing headwind shear.

26
Q

You’re flying an ILS doing 150kts. and all of a sudden you’re high and your IAS is 160kts. What have you experienced?

A

Head wind shear.

27
Q

Reduced Braking Action due to ICE. What do you do?

A

Max braking early.

28
Q

Mtn. Wave turbulence

A

Updrafts and downdrafts crated by wind greater Than or equal to 15 knots from the west.

29
Q

Lose EPR

A

Check RMP

30
Q

What happens to stall speed as you increase in altitude?

A

Stall speed increases due to load factor increase.

31
Q

How does turbulence affect stall speed?

A

Increase due to load factor increase.

32
Q

If you get Spatial Disorientation?

A

give the other person control of the jet.

33
Q

At VDP tower directs you to execute missed approach

A

Go to MAP, then execute missed approach procedure.

34
Q

Effects of Density Alt on V1

A 
Higher altitude increase V1
Heavy wights increase V1
Stall speed increases with weight increase.
TAS increases with altitude 
TAS increases with Temp.
35
Q

Holding Speed

A

0 to 6,000 = 200 IAS
6001 to 14,000 = 230 IAS
14,001 and up = 265 IAS

36
Q

As you slow down you _______ Induced Drag

A

Increase Induced drag do to the increased AOA

37
Q

Headwinds increase on final

A

Decrease rate of descent.

38
Q

Lose generates, but eventually get one back

A

indication of load (work) on AC bus

look at Ammeter to read Kilowatt.

39
Q

Critical Mach is _________ at higher Altitude.

A

Lower

40
Q

Shock Wave formation occurs at_____ edge first.

A

trailing

41
Q

60 DME .6 Mach need to fly from 270 Radial to 300 Radial. find lead point and time to intercept?

A

= 5 min and 4 radials
.6 - 2 = 4 radials
30 radials / 6mpm = 5 min.

42
Q

Inbound Rwy 36. FAF is defiance off XYZ 090/20 and your bearing to XYZ is 288. how far to the FAF?

A

= 6 NM
(288 = 108) 108 - 090 = 180
180 / 3 (20 = 3) = 6

60 = 1 
30 = 2
20 = 3 
15 = 4
10 = 6
43
Q

Speed of sound Varies with?

As Temperature increases the speed of sound _______.

As Temp increases TAS __________.

A

Temperature

Increases

Increases

44
Q

an increase in density altitude will increase the landing velocity (TAS) but will not alter the net _________>

A

Retarding force (Braking Action)

45
Q

An approximate increase in landing distance with altitude is approximately ____ for each 1,000 ft. of altitude.

A

3.5 %

46
Q

MDA LOC 27 = 450 AGL

What is the VDP Distance

A

= 1.5 from end of runway

450/300 = 1.5 miles.

47
Q

Vortex Generator.

A

Provides airflow control that delays boundary layer separation. They are small wing like surfaces that protect vertically into the airstream. A vortex is formed at the tips of these generators placed ahed of the control surface and adds energy to the air in the boundary layer from outside the boundary layer. This additional energy enable the boundary layer to overcome the additional pressure gradient of the shock wave and prevents separation. They also reduce wave drag.

48
Q

What three things effect hydroplaning?

A

Tire Pressure
Weight
Depth of water

49
Q

Vref =

A

Reference speed normally 1.3 VSO

50
Q

What is a Mountain wave?

A

Air flowing up the windward side of a mountain is relatively smooth. Dangerous down drafts may be encountered on the lee side. The wave pattern may exited 100 miles down wind of the barrier. Mountain wave winds are typically Westerly.

51
Q

What are the effects of landing on a narrow runway?

A

You fly a lower than normal approach.

52
Q

Mach ___________ with an increase in altitude.

TAS ____________ with an increase in altitude.

Speed of Sound __________ with an increase in altitude.

Critical Mach Number __________ with increase in alt.

A

Increases

Increases

Decreases

Decreases

53
Q

If you have a total AC power failure and get a Generator back on line what will give you an indication of its power?

A

Kilowatt Meter

Some say Ammeter.

54
Q

Holding fuel is Gross weight minus the ___________

A

Zero fuel weight.

55
Q

Fuel burn per engine is 3,000 lbs per engine. You have 5000 lbs of holding fuel. How long can you hold?

A

= 50 min
5,000 / 6000 = .833
.833 X 60 = 49.8 min

56
Q

Always land with good engine into the wind in counteracts the _______________.

A

Weather vane.

57
Q

FL 250 and your Mach is .70 the Temp is -40C What is your Ground Speed

A

= 414 kts
.70 X 60 = 420
-40C = (250 x 2 = 50 - 15 = 35) The Standard Temp at 250 should be -35 C.
-40 C is 5 degrees colder that standard, so you are going slower.
5 x 1.2 = 6 knots
420 - 6 = 414 knots.

58
Q

What Changes AC to DC

A

Transformer Rectifier, they change the frequency and the rectifier changes AC to DC

WEATHER (11 decks)

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