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WorksheetsMETEOROLOGICAL AND BRIEFING+MISCELLANEOUS
Total questions: 60
Worksheet time: 33mins
Who prepares National SIGWX Charts
WAFC
MWOs
AMOs
Flight Level of freezing Level is included in SIGWX Charts
Medium level charts
High level charts
Low level charts
Fog, precipitation and weather that reduce visibility below 5000 m are considered Significant weather for
Low level flights
High level flights
All level flights
Briefing and consultation are generally provided to the aircrew hours prior to the scheduled departure
3 hr
5 hr
6 hr
SIGMET information is provided to
Low level flights
All level flights
High level flights
For Low Level flights, and those under Visual Flight Rules, briefing is given up to
FL120 or over the plains
FL110 above the sea
FL150 or above in mountains
The height indications in the flight documentation for all en‑route meteorological conditions (for example upper winds, turbulence, cloud base/top) are
Flight Levels
As requested by the pilot
Above aerodrome elevation
The height indications in the flight documentation for all aerodrome meteorological conditions (for example base and top of clouds) are
Above aerodrome elevation
Flight Levels
As requested by the pilot
For national flights the documents provided are
Both WAFC upper wind and temperature charts and National SIGWX charts
WAFC upper wind and temperature charts only
National SIGWX charts only
For national flights the winds and temperatures are provided for low-level flights for altitudes
3000 ft, 5000 ft, 10,000 ft
600, 1500 and 300 m
600, 1000 and 500 m
Translucent rime ice forms due to
Deposition by supercooled droplets
Sublimation of large hail
Freezing of small supercooled water drops
Freezing of large supercooled water drops
Advection fog occurs due to air moving over surface
Warm and moist air, cold, both land and sea
Cold and dry air, sea only
Moist and cold, warm, land only
Dry, wet, land only
ELR 6.5°C and SALR 7°C on lifting a saturated parcel of air the atmosphere would be
Stable
Absolutely stable
Indifferent
Absolutely unstable
Gradient wind is weaker than geostrophic wind around a low because
Coriolis force is added to the pressure gradient force
Centripetal force is added to the pressure gradient force
Coriolis force is opposite to centripetal
Centripetal force is provided by pressure gradient force
The altimeter of an aircraft is set to QFE before landing; on landing it will indicate
Height of aircraft wheels above runway
Flight Level
Aircraft altitude AMSL
Height of aircraft above ARP in ISA
TAF generally has a validity of how many hours, and TREND how many hours
24 hr; 9 hr
24 hr; 3 hr
9 hr; 2 hr
12 hr; 2 hr
CAT is most pronounced on which side of a subtropical jet stream
About 3 km above the core
At core
Cold side of core
South side of core
Hail forms by collision with super-cooled water drops by
Transpiration
Deposition
Condensation
Evaporation
Thermal wind blows parallel to keeping to the left
Isotherms, low temperature
Isobars, low temperature
Isallobars, high temperature
Isobars, low pressure
Roaring Forties are winds that blow throughout the year and are of very stormy nature in
Easterlies, Southern Hemisphere
Westerlies, Northern Hemisphere
Easterlies, Southern Hemisphere
Westerlies, Southern Hemisphere
Temperature in the troposphere decreases from equator to poles. The thermal wind throughout the troposphere is therefore what, and as height increases does what
Westerly, increases
Easterly, increases
Westerly, decreases
Westerly, remains same
A cold front passes a station; the pressure
First increases and then decreases
Changes are very small
Rises continually
First decreases and then increases
Flying conditions associated with cumulonimbus during pre-monsoon are
Continuous rain, poor visibility, light turbulence
Rain, poor visibility, turbulence
Hail, gusts, showers, severe turbulence
Good visibility, drizzle, turbulence
Which is true of a cold front
Heavy convective weather and squall line
Similar slope as warm front
Associated with continuous rain and stratiform clouds
Less steeper than a warm front
The observed temperature is −40°C at FL300 (10 km). It is termed as
10°C colder than ISA
At ISA standard temperature
20°C colder than ISA
10°C warmer than ISA
Aquaplaning may occur in
-TS
+RA
- GR
Thick Fog
CAT is most likely to be encountered in
A high close to a Dust Storm
After the passage of a severe Sandstorm
A sharp trough aloft with winds of jet stream speed
A ridge aloft
Example of non frontal stability is
Occlusion
Frontogenesis
Inversion
Squall line
If temperature initially is constant and then increases with height, the atmosphere is
Stable
Unstable
Indifferent
Adiabatic
Under what conditions severe icing is encountered
visible vapour and temperature -5 deg C
rain and temperature below -10 deg C
temperature 0 deg C
rain at temperature -20 deg C
The level most potent for dangerous icing is
Freezing level to about 25,000 ft
10 to 30 deg C temperature range
From ground to freezing level
-20 to -40 deg C temperature range
Ice accretion
alters aerodynamies, reduces weight, and decrease lift
alters aerodynamics, increases weight and lift
increases drag but reduces stalling speed
increases drag and weight and stalling speed
The wind 260102 KT is reported in a METAR/SPECI as
260P99 KT and complete wind in remark column
Only in remark column
260P99 KT only
26010 KT + 26002 KT
Will SPECI be issued if
RVR changes from 1400 m to 1600 m
Wind changes from 27010 KT to 29018 KT
Visibility changes from 6000 m to 4000 m
Temperature changes from 15 to 16 deg C
CAVOK in a METAR replaces
Visibility, cloud and Wx groups
Wind, visibility & cloud groups
Visibility, temp & cloud groups
Wind, temp & pressure groups
The calm and clear night is cooler than cloudy night because
Terrestrial radiation skip through clouds
Due to CO2 and H2O present in the air
Clouds radiate heat towards sky
Clouds prevent terrestrial radiation from escaping
Diurnal variation of temperature is least
When sky is clear
When winds are weak over the land surface
During land breeze over the coastal areas
When sky is overcast
Density altitude is
Higher if atmosphere is warmer than ISA
Lower if atmosphere is warmer than ISA
Higher if atmosphere is colder than ISA
Higher if atmosphere is isothermal
The temperature to which air should be cooled to saturate it is
—
Wet bulb
Dew point
Dry bulb
No cyclonic storm or high pressure systems form within 5° of the equator because
Coriolis force is negligible
Geotropic force is maximum
Pressure gradient force is negligible
Frictional force is minimal
Gradient wind
Is due to the balance between Pressure gradient force and Friction
Is due to the balance between Pressure gradient, Coriolis and Centripetal forces
Blows parallel to straight isobars
Is super geostrophic in a low and subgeostrophic in a high
Effect of Wind Shear
Weakening head wind raises aircraft above the flight path
Decreasing tail wind increases lift and a/c rises above the glide path
Increasing tail wind increases lift
Decreasing head wind increases lift
Due to friction the wind
Strengthens and backs during take off
Strengthens and backs during landing
Decreases and backs during landing
Decreases and veers during landing
The term 'monsoon' means
Seasonal reversal of winds and rainfall
Rains all over India
One of the four seasons with maximum rain in the N
Monsoon circulation
The two main seasons in India are
Pre monsoon and SW monsoon
Winter and SW monsoon
Hot season and Rainy season
Winters and Hot season
The main cause of seasons in India is
Along central peninsula
Along 22 deg East to West of India
Oscillation of sun 23½ N to 23 ½ S
Thermal equator at equator whole year
The axis of monsoon trough runs
Earth rotating around its own axis
Advection of air from Arabian sea
Along the Gangetic plains
In the Bay of Bengal
During monsoon season the low level winds are
SEly along E coast
SEly over Bay of Bengal
NEly over Tamil Nadu
SEly North of Monsoon Trough
During SW monsoon the winds above 500 hPa are
Wly over S and weak Wly over N India
Strong Ely over S and weak over N India
Wly over S and strong over N India
Ely over S and weak Wly over N India
Which is not true of post monsoon
Worst period for flying expect S India
Pressure gradient is weakest of all seasons
Frequency of tropical cyclones is max.
Monsoon withdraws from the country
The months during which Tamil Nadu gets most of its rainfall are
Dec - Mar
Jul - Sep
Apr - Jun
Oct - Nov
ITCZ affects weather over India during
Winters only
Monsoons only
All the four seasons
Pre - monsoon only
ESNO is the name given to
El - Nino and Southern oscillations
El - Nino and La - Nino combined
Southern oscillations and La- Nino
El - Nino only
Friction causes winds to get deflected
Station level pressure at an aerodrome reference point is reduced to mean sea level as per
ISA is QNH
Isothermal is QNH
ISA iS OFFI
ISA is QFF
An aircraft moving from west to east and drifting northwards will have its altimeter
Reading will remain unchanged
Under read
Over read
Wind shear in a thunderstorm is maximum
In southwest sector
Below the anvil
Beneath the cloud
All sides of a cumulonimbus
A key difference between airmass thunderstorms and steady state thunderstorms is
SS TS duration is more
AM TS duration is more
SS TS duration is less
AM TS occur in fronts
In a line of thunderstorms there is a hole in the radar echo. What would you infer?
A gap between two cumulonimbus
Strong convective activity
No precipitation
Area free of clouds
What are Norwesters
(a) Warm dry winds coming from NW
(b) Severe Duststorm from NW
(d)TS of E and NE India in premonsoon
