MISCELLANEOUS – Air – DGCA Question Bank For Politics

#1. Translucent rime ice forms due to

Melting of large snow particles

freezing of large supercooled water drops

Freezing of small supercooled water drops

Sublimation of large hail

#2. Advection fog occurs due to ........ air moving over ............ surface over .............

Dry, wet, land only

Moist and cold, warm, land only

Warm & moist air, cold, both land & sea

#3. ELR 6.5° C and SALR 7° C on lifting a saturated parcel of air the atmosphere would be

Stable

Absolutely stable

Absolutely unstable

Indifferent

#4. Gradient wind is weaker than geostrophic wind around a low because

Centripetal force is provided by pressure gradient force

Centripetal force is added to the pressure gradient force

Coriolis force is added to the pressure gradient force

Coriolis force is opposite to centripetal

#5. The altimeter of an aircraft is set to QFE before landing, on landing it will indicate

Height of A/C wheels above runway

Flight level

A/C altitude AMSL

Height of A/C above ARP in ISA

#6. TAF generally has a validity of .......... hr and TREND ........... hr

9 hr; 2 hr

24 hr; 3 hr

12 hr; 2 hr

24 hr; 9 hr

#7. CAT is most pronounced on which side of a subtropical jet stream

About 3 km above the core

Cold side of core

South side of core

at core

#8. Hail forms by collision with super - cooled water drops by

Condensation

Deposition

Evaporation

Transpiration

#9. Thermal wind blows parallel to ............ keeping ............ to the left

Isotherms, low temperature

Isobars, low temperature

Isobars, low pressure

Isallobars, high temperature

#10. Roaring Forties are ............... winds blow throughout the year and are of very stormy nature in

Wly, N hemisphere

Ely, S hemisphere

Wly, S hemisphere

Ely, S hemisphere

#11. Temperature in the troposphere decreases from equator to poles. The thermal wind throughout troposphere is therefore ......... and ........ as height increases

Wly, increases

Wly, decreases

Wly, remains same

Ely, increases

#12. A cold front passes a station, the pressure

Change are very small

First increases and then decreases

First decreases and then increases

Rises continually

#13. Flying conditions associated with CB during pre monsoon are

Continuous rain, poor visibility, light turbulence

Good visibility, drizzle, turbulence

Hail, gusts, shower, and severe turbulence

Rain, poor visibility, and turbulence

#14. Which is true of a cold front

Less steeper than a warm front

Associated with continuous rain and ST clouds

Heavy convective weather and squall line

Similar slope as warm front

#15. The observed temperature is - 40 deg C at FL 300 (10 km). it is termed as

10 deg C warmer than ISA

10 deg C colder than ISA

15 deg C warmer than ISA

15 deg C colder than ISA

#16. Aquaplaning may occur in

-GR

+RA

-TS

Thick Fog

#17. 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

#18. What are Norwesters

Warm dry winds coming from NW

Severe Dust storm from NW

TS affecting NW India in premonsoon

TS of E and NE India in premonsoon

#19. Example of non frontal stability is

Squall line

Inversion

Frontogenesis

Occlusion

#20. If temperature initially is constant and then increases with height, the atmosphere is

Stable

Unstable

Indifferent

Adiabatic

#21. Under what conditions severe icing is encountered

Temperature 0 deg C

Rain and temperature below - 10 deg C

Visible vapour and temperature - 5 deg C

Rain at temperature - 20 deg C

#22. No questions in the pdf

The level from ground to freezing level is more susceptible for icing

Most potent area for dangerous icing is freezing level to about 25,000 ft

icing may be severe in the temperature range - 20 to - 40 deg C

Severe icing may form in the temperature range - 10 to 30 deg C

#23. Ice accretion

Increases drag but reduces stalling speed

Alters aerodynamics, reduces weight, and decrease lift

Alters aerodynamics, increases weight and lift

Increases drag and weight and stalling speed

#24. The wind 260102 KT, is reported in a METAR / SPECI as:

260102 KT + 26002 KT

260P99 KT only

Only in remark column

260P99 KT and complete wind in remark column

#25. Will SPECI be issued if

Wind change from 27010 KT to 29018 KT

RVR change, from 1400 m to 1600 m

Visibility change from 6000 m to 4000 m

Temperature change from 15 to 16 deg C

#26. CAVOK in a METAR replaces

Visibility, cloud and Wx groups

Wind, visibility & cloud groups

Wind, temp & pressure groups

Visibility, temp & cloud groups

#27. The calm and clear night is cooler than cloudy night because

Clouds prevent terrestrial radiations from escaping

Clouds radiate heat towards sky

Due to CO2 and H2O present in the air

Terrestrial radiation skip through clouds

#28. Diurnal variation of temperature is least

When sky is clear

During land breeze over the coastal areas

When sky is overcast

When winds are weak over the land surface

#29. 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

#30. The temperature to which air should be cooled to saturate it is ......... temperature

Wet bulb

Dew point

Dry bulb

Ambient

#31. No cyclonic storm or high pressure system form within 5° of the equator because

Pressure gradient force is negligible

Frictional force is minimal

Coriolis force is negligible

Geotropic force is maximum

#32. Gradient wind

Is due to the balance between pressure gradient force and friction

Is super geostrophic in a low and subgeostrophic in a high

Is due to the balance between pressure gradient, Coriolis and Centripetal forces

Blows parallel to straight isobars

#33. Effect of wind shear

Decreasing head wind increases lift

Increasing tail wind increases lift

Decreasing tail wind increases lift and a/c rises above the glide path

Weakening head wind raises aircraft above the flight path

#34. Due to friction the wind

Strengthens and backs during landing

Decreases and backs during landing

Strengthens and backs during take off

Decreases and veers during landing

#35. The two main seasons in India are

Pre monsoon and SW monsoon

Winters and Hot season

Hot season and Rainy season

Winter and SW monsoon

#36. The main cause of seasons in India is

Oscillation of sun 23 1/2 N to 23 1/2 S

Advection of air from Arabian sea

Thermal equator at equator whole year

Earth rotating around its own axis

#37. The axis of monsoon trough runs

In the Bay of Bengal

Along the Gangetic plains

Along 22 deg East to West of India

Along central peninsula

#38. During monsoon season the low level winds are

SEly along E coast

NEly over Tamil Nadu

SEly over Bay of Bengal

SEly North of monsoon trough

#39. During SW monsoon the winds above 500 hPa are

Ely over S weak Wly over N India

Wly over S and strong over N India

Wly over S and weak Wly over N India

Strong Ely over S weak over N India

#40. Which is not true of post monsoon

Pressure gradient is weakest of all seasons

Frequency of tropical cyclones is max

Monsoon withdraws from the country

Worst period for flying expect S India

#41. The months during which Tamil Nadu gets most of its rainfall are

Oct - Nov

Jul - Sep

Apr - Jun

Dec - Mar

#42. ITCZ affects weather over India during

Winters only

Pre - monsoon only

Monsoon only

All the four seasons

#43. ESNO is the name given to

El - Nino only

Southern oscillations and La - Nino

El - Nino and Southern oscillations

El - Nino and La - Nino combined

#44. Friction causes winds to get deflected ...........

Parallel to isobars

Towards low

Perpendicular to isobars

Towards high

#45. Station level pressure at ARP is reduced to MSL as per

ISA is QFF

ISA is QFE

Isothermal is QNH

ISA is QNH

#46. A/C moving from west to east and its drifting northwards. Its altimeter will

Under read

Over read

Reading will remain unchanged

#47. Wind shear in a TS is maximum

Below the anvil

All sides of a CB

Beneath the cloud

In SW sector

#48. Difference between Airmass TS (AM TS) and steady state TS (SS TS) is

SS TS duration is more

AM TS duration is more

SS TS duration is less

AM TS occur in fronts

#49. In a line of TS there is a hole in the Radar echo, what would you infer

No precipitation

Strong convective activity

Area free of clouds

A gap between two CB

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