Vayudoot Aviation

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

Stable

Adiabatic

Unstable

Indifferent

2. CAT is most likely to be encountered in

A ridge aloft

A sharp trough aloft with winds of jet stream speed

A high close to a dust storm

After the passage of a severe sandstorm

3. Friction causes winds to get deflected ...........

Perpendicular to isobars

Towards high

Towards low

Parallel to isobars

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

Oct - Nov

Jul - Sep

Apr - Jun

Dec - Mar

5. Hail forms by collision with super - cooled water drops by

Evaporation

Deposition

Condensation

Transpiration

6. The wind 260102 KT, is reported in a METAR / SPECI as

260102 KT + 26002 KT

260P99 KT only

260P99 KT and complete wind in remark column

Only in remark column

7. 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

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

Wet bulb

Dew point

Dry bulb

Ambient

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

Under read

Over read

Reading will remain unchanged

10. ESNO is the name given to

El - Nino only

Southern oscillations and La - Nino

El - Nino and La - Nino combined

El - Nino and Southern oscillations

11. 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

12. Gradient wind

Blows parallel to straight isobars

Is super geostrophic in a low and subgeostrophic in a high

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

Is due to the balance between pressure gradient force and friction

13. No questions in the pdf

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

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

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

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

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

Geotropic force is maximum

Coriolis force is negligible

Pressure gradient force is negligible

Frictional force is minimal

15. Will SPECI be issued if

Visibility change from 6000 m to 4000 m

Wind change from 27010 KT to 29018 KT

RVR change, from 1400 m to 1600 m

Temperature change from 15 to 16 deg C

16. Aquaplaning may occur in

-GR

+RA

-TS

Thick Fog

17. Which is true of a cold front

Heavy convective weather and squall line

Less steeper than a warm front

Similar slope as warm front

Associated with continuous rain and ST clouds

18. 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

19. The axis of monsoon trough runs

Along the Gangetic plains

Along 22 deg East to West of India

In the Bay of Bengal

Along central peninsula

20. Under what conditions severe icing is encountered

Temperature 0 deg C

Visible vapour and temperature - 5 deg C

Rain and temperature below - 10 deg C

Rain at temperature - 20 deg C

21. 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

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

SS TS duration is less

AM TS occur in fronts

AM TS duration is more

SS TS duration is more

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

ISA is QNH

Isothermal is QNH

ISA is QFE

ISA is QFF

24. Ice accretion

Increases drag and weight and stalling speed

Alters aerodynamics, increases weight and lift

Increases drag but reduces stalling speed

Alters aerodynamics, reduces weight, and decrease lift

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

Height of A/C above ARP in ISA

A/C altitude AMSL

Flight level

Height of A/C wheels above runway

26. Advection fog occurs due to ........ air moving over ............ surface over .............

Moist and cold, warm, land only

Dry, wet, land only

Warm & moist air, cold, both land & sea

27. Thermal wind blows parallel to ............ keeping ............ to the left

Isotherms, low temperature

Isobars, low pressure

Isallobars, high temperature

Isobars, low temperature

28. Which is not true of post monsoon

Worst period for flying expect S India

Monsoon withdraws from the country

Pressure gradient is weakest of all seasons

Frequency of tropical cyclones is max

29. The main cause of seasons in India is

Advection of air from Arabian sea

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

Thermal equator at equator whole year

Earth rotating around its own axis

30. Example of non frontal stability is

Frontogenesis

Squall line

Inversion

Occlusion

31. The term 'monsoon' means

One of the four seasons with maximum rain in the N

Rains all over India

Seasonal reversal of winds and rainfall

Monsoon circulation

32. During monsoon season the low level winds are

NEly over Tamil Nadu

SEly along E coast

SEly North of monsoon trough

SEly over Bay of Bengal

33. Density altitude is

Higher if atmosphere is colder than ISA

Lower if atmosphere is warmer than ISA

Higher if atmosphere is warmer than ISA

Higher if atmosphere is isothermal

34. During SW monsoon the winds above 500 hPa are

Wly over S and weak Wly over N India

Ely over S weak Wly over N India

Strong Ely over S weak over N India

Wly over S and strong over N India

35. ITCZ affects weather over India during

Pre - monsoon only

Winters only

Monsoon only

All the four seasons

36. Wind shear in a TS is maximum

Beneath the cloud

In SW sector

Below the anvil

All sides of a CB

37. A cold front passes a station, the pressure

Change are very small

Rises continually

First increases and then decreases

First decreases and then increases

38. The two main seasons in India are

Hot season and Rainy season

Pre monsoon and SW monsoon

Winter and SW monsoon

Winters and Hot season

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

Wly, remains same

Wly, increases

Wly, decreases

Ely, increases

40. Diurnal variation of temperature is least

When winds are weak over the land surface

During land breeze over the coastal areas

When sky is clear

When sky is overcast

41. Translucent rime ice forms due to

Sublimation of large hail

Freezing of small supercooled water drops

Melting of large snow particles

freezing of large supercooled water drops

42. 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

43. 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

44. 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 prevent terrestrial radiations from escaping

Clouds radiate heat towards sky

45. CAVOK in a METAR replaces

Wind, visibility & cloud groups

Wind, temp & pressure groups

Visibility, temp & cloud groups

Visibility, cloud and Wx groups

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

Area free of clouds

No precipitation

A gap between two CB

Strong convective activity

47. TAF generally has a validity of .......... hr and TREND ........... hr

12 hr; 2 hr

9 hr; 2 hr

24 hr; 9 hr

24 hr; 3 hr

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

South side of core

at core

Cold side of core

About 3 km above the core

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

10 deg C colder than ISA

10 deg C warmer than ISA

15 deg C warmer than ISA

15 deg C colder than ISA

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

Indifferent

Stable

Absolutely unstable

Absolutely stable

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