Chapter 7.2 - Exam Review

Question 1

In the southern hemisphere, the wind blows (clockwise/anticlockwise) around an anti-cyclone?

Answer 1

Anti-Clockwise.

Question 2

In what direction does the wind blow around a depression or low pressure in the southern hemisphere?

Answer 2

Clockwise.

Question 3

What is another name for an anticyclone? What type of weather is generally associated with an anticyclone?

Answer 3

• High.

- Warm/Fine Weather.

Question 4

What is the name given to lines on a weather map joining places of equal pressure?

Answer 4

Isobars.

Question 5

The close together the isobars on a weather map, the (weaker/stronger) the wind?

Answer 5

Stronger.

Question 6

An inversion is a condition in the atmosphere where the temperature (increases/decreases) with height rather than the other way round?

Answer 6

Increases.

Question 7

What should the minimum visibility be for VFR flights?

Answer 7

5000m.

Question 8

When the air is unstable, it will continue to rise after initial lifting and (cumuliform/Stratiform) clouds will form?

Answer 8

Cumuliform.

Question 9

If the air is stable, it will not rise any further after initial and (cumuliform/Stratiform) clouds will form?

Answer 9

Stratiform.

Question 10

If a cloud’s base is anywhere from the surface up to 8500ft, it belongs to the (low/middle/high) groups of cloud?

Answer 10

Low.

Question 11

Name on cloud which usually has a very low base and, like fog, can obscure rising ground?

Answer 11

Stratus.

Question 12

What is the name of the thunderstorm cloud?

Answer 12

Cumulonimbus.

Question 13

Heavy rain is more likely to be associated with (stratus/nimbostratus) cloud?

Answer 13

Nimbostratus.

Question 14

Drizzle is more likely to be associated with (stratus/nimbostratus) cloud?

Answer 14

Stratus.

Question 15

The worst hazard to flight associated with thunderstorms is (heavy rain/turbulence)?

Answer 15

Turbulence.

Question 16

List three visible, forecast or geographic signs, which may indicate the presence of turbulence?

Answer 16

• Thunderstorms.
• Strong Winds.
• Cold Front.

Question 17

If turbulence is encountered in high-speed cruising flight, the Aircraft’s speed is usually increased to/decreased to) its turbulence penetration speed?

Answer 17

Decreased to.

Question 18

True or False. Excessive gust-induced loads (from severe turbulence) at the high end of the speed range may overstress the Aircraft’s structure to the extent that failure will result?

Answer 18

True.

Question 19

The term used to describe a sudden change in windspeed and/or direction from the surface to about 2000ft AGL is (low level Windshear/mountain wave turbulence)?

Answer 19

Low Level Windshear.

Question 20

True or False. Forecast strong winds gusting to high speeds and/or change in wind direction above a temperature inversion are signs of the likely presence of a strong wind gradient or Windshear?

Answer 20

True.

Question 21

Are all thermals visible?

Answer 21

No.

Question 22

Do thermals pose a greater problem to Aircrafts during cruise or on approach to land? What hazard do they create?

Answer 22

• Approach to Land.

- Difficult to control flight path.

Question 23

When approaching to land in hot, dry, inland areas, dust devils can suddenly form and spin across the runway in front of the Aircraft. What is the major hazard to Aircrafts in this situation (structural damage/difficulty in control)?

Answer 23

Difficulty in Control.

Question 24

For thermals and/or dust devils to form, the atmosphere in the lower levels must be (stable/unstable)?

Answer 24

Unstable.

Question 25

Which of the following meteorological phenomenon normally rises to a higher level in the atmosphere (dust devils/thermals)?

Answer 25

Thermals.

Question 26

In ATIS broadcasts, wind direction is given in (true/magnetic) whereas in area forecasts (ARFORs) and aerodrome forecasts (TAFs), it is given in (true/magnetic)?

Answer 26

- Magnetic. | - True.

Question 27

In an aerodrome weather report or a TAF, what term is used to indicate the following conditions are visibility of 10km or more, no cloud below 5000ft AGL and no cumulonimbus cloud with no weather phenomenon?

Answer 27

CAVOK.

Question 28

Cloud base in an ARFOR is given (AGL/AMSL)?

Answer 28

AMSL.

Question 29

Cloud base in a TAF is given (AMSL/AGL)?

Answer 29

AGL.

Question 30

In an ARFOR, how is cloud amount of 5 to 7 OKTAs indicated?

Answer 30

BKN (Broken).

Question 31

Is the height of both cloud base and cloud tops given in TAFs and ARFOR?

Answer 31

- No (TAF). | - Yes (ARFOR).

Question 32

What is the abbreviation used in forecasts to indicate that changes in prevailing conditions are expected to last for between 30 and 60 minutes?

Answer 32

TEMPO.

Question 33

Changing in prevailing conditions which are forecast to last less than 30 minutes are indicated by the abbreviation?

Answer 33

INTER.

Question 34

What is indicated by the abbreviation FM in a forecast?

Answer 34

A significant change in conditions is expected to be of a more lasting nature than TEMPO and INTER.

Question 35

In a TAF, the wind forecast as 01010G25KT. What does this mean?

Answer 35

Wind is coming from 010T at speed of 10kts and Gust of 25kts.

Question 36

In a TAF, what is meant be VRB05KT?

Answer 36

Variable Winds of 5kts.

Question 37

The wind in an aerodrome forecast (TAF) or a weather report (METAR) is shown as 00000. What does this mean?

Answer 37

Wind is calm.

Question 38

How is the visibility indicated in a TAF if it is above 10km?

Answer 38

9999.

Question 39

Forecasts are statements of (actual/expected) conditions and weather reports are statements of (actual/expected) conditions?

Answer 39

- Expected. | - Actual.

Question 40

TAFs are issued for a specified period in the Airspace within a radius of (5NM/10NM) from the centre of the aerodrome for which they are issued?

Answer 40

5NM.

Question 41

What type of forecast (as a minimum) would you need for a flight to the training area and back?

Answer 41

ANFOR.

Question 42

An aerodrome weather report issued routinely every hour or half hour and which is a statement of actual existing conditions at that time, is known as a (METAR/SPECI)?

Answer 42

METAR.

Question 43

The following TAF is issued for Broken Hill in NSW on the 13th December: ``` 01:15 UTC, 13/12/XX TAF YBHI 130115Z 1302/1314 VRB05KT 9999 RASH SCT040 INTER 1305/1311 3000 TS BKN040CB RMK T 32 34 32 25 Q 1019 1017 1017 1018 ``` a) For how long is the forecast valid and between what times? b) What is the visibility and is it likely to remain the same for the whole period? c) Between what times is the visibility forecast to deteriorate? d) For what periods is the visibility likely to deteriorate, and what is the forecast visibility during these periods? e) During the period of variation from the basic forecast, what amount, type and base of cloud is estimated?

Answer 43

a) 12hours (between 0200 and 1400). b) 10km and visibility will change. c) 0500 and 1100 on 13th. d) 30mins or less. 3000 metres. e) 5-7 OKTAs cumulonimbus base 4000ft AGL.

Question 44

An ARFOR forecast the following cloud: ISOL EMBD CB 3000/4000 BKN ST 1000/4000 IN RA/TS OVC NS 2000/28000 LYR a) Interpret the forecast cloud amount, type, base and top? b) What cloud type has the greatest coverage and what is its base? c) With this forecast covering your training area, would VFR flight be possible in the area? Give reasons.

Answer 44

a) Isolated embedded cumulonimbus, broken status, and overcast nimbostratus. b) Overcast nimbostratus with base at 2000ft AMSL. c) No – cloud is too low and has too much coverage.

Question 45

The visibility in an ARFOR is forecast as follows: 1000M TS, 3000M SH/RA a) Interpret the visibility as forecast? b) Would VFR flight be possible in the area? Give reasons.

Answer 45

a) 1000 metres in Thunderstorm and 3000 metres in showers of rain. b) Yes providing the weather is avoided.

Question 46

Part of an ARFOR contains the following: OCNL FBL/MOD THERMALS BLW 6000 TIL 0700 a) What hazardous weather phenomenon is forecast? b) Interpret the forecast as it exists?

Answer 46

a) Light to moderate thermals. | b) Occasional light to moderate thermals below 6000ft until 0700.