Vayudoot Aviation

1. ESNO is the name given to

El - Nino and La - Nino combined

El - Nino only

Southern oscillations and La - Nino

El - Nino and Southern oscillations

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

Wly, remains same

Ely, increases

Wly, decreases

Wly, increases

3. Will SPECI be issued if

Temperature change from 15 to 16 deg C

Wind change from 27010 KT to 29018 KT

RVR change, from 1400 m to 1600 m

Visibility change from 6000 m to 4000 m

4. 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

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

Strong convective activity

No precipitation

A gap between two CB

Area free of clouds

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

Stable

Absolutely unstable

Absolutely stable

Indifferent

7. The term 'monsoon' means

Monsoon circulation

Seasonal reversal of winds and rainfall

One of the four seasons with maximum rain in the N

Rains all over India

8. No questions in the pdf

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

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

9. Which is not true of post monsoon

Monsoon withdraws from the country

Frequency of tropical cyclones is max

Worst period for flying expect S India

Pressure gradient is weakest of all seasons

10. During monsoon season the low level winds are

SEly along E coast

SEly North of monsoon trough

NEly over Tamil Nadu

SEly over Bay of Bengal

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

Isobars, low pressure

Isallobars, high temperature

Isotherms, low temperature

Isobars, low temperature

12. Under what conditions severe icing is encountered

Rain at temperature - 20 deg C

Temperature 0 deg C

Visible vapour and temperature - 5 deg C

Rain and temperature below - 10 deg C

13. Translucent rime ice forms due to

Sublimation of large hail

Melting of large snow particles

Freezing of small supercooled water drops

freezing of large supercooled water drops

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

Wly, N hemisphere

Ely, S hemisphere

Wly, S hemisphere

15. The axis of monsoon trough runs

Along 22 deg East to West of India

In the Bay of Bengal

Along the Gangetic plains

Along central peninsula

16. During SW monsoon the winds above 500 hPa are

Wly over S and weak Wly over N India

Strong Ely over S weak over N India

Ely over S weak Wly over N India

Wly over S and strong over N India

17. Ice accretion

Increases drag and weight and stalling speed

Alters aerodynamics, reduces weight, and decrease lift

Alters aerodynamics, increases weight and lift

Increases drag but reduces stalling speed

18. The two main seasons in India are

Winter and SW monsoon

Pre monsoon and SW monsoon

Hot season and Rainy season

Winters and Hot season

19. 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

20. Density altitude is

Lower if atmosphere is warmer than ISA

Higher if atmosphere is isothermal

Higher if atmosphere is warmer than ISA

Higher if atmosphere is colder than ISA

21. 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

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

About 3 km above the core

at core

South side of core

Cold side of core

23. The calm and clear night is cooler than cloudy night because

Clouds prevent terrestrial radiations from escaping

Due to CO2 and H2O present in the air

Terrestrial radiation skip through clouds

Clouds radiate heat towards sky

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

Wet bulb

Dew point

Ambient

Dry bulb

25. Diurnal variation of temperature is least

When sky is clear

When sky is overcast

When winds are weak over the land surface

During land breeze over the coastal areas

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

15 deg C colder than ISA

15 deg C warmer than ISA

10 deg C colder than ISA

10 deg C warmer than ISA

27. Example of non frontal stability is

Inversion

Squall line

Occlusion

Frontogenesis

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

Under read

Over read

Reading will remain unchanged

29. Friction causes winds to get deflected ...........

Perpendicular to isobars

Towards low

Towards high

Parallel to isobars

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

Pressure gradient force is negligible

Geotropic force is maximum

Frictional force is minimal

Coriolis force is negligible

31. A cold front passes a station, the pressure

First decreases and then increases

First increases and then decreases

Change are very small

Rises continually

32. CAVOK in a METAR replaces

Wind, temp & pressure groups

Wind, visibility & cloud groups

Visibility, cloud and Wx groups

Visibility, temp & cloud groups

33. Wind shear in a TS is maximum

Beneath the cloud

Below the anvil

All sides of a CB

In SW sector

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

AM TS duration is more

SS TS duration is less

AM TS occur in fronts

SS TS duration is more

35. What are Norwesters

TS of E and NE India in premonsoon

TS affecting NW India in premonsoon

Severe Dust storm from NW

Warm dry winds coming from NW

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

ISA is QFF

Isothermal is QNH

ISA is QNH

ISA is QFE

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

Evaporation

Transpiration

Deposition

Condensation

38. ITCZ affects weather over India during

Monsoon only

Pre - monsoon only

Winters only

All the four seasons

39. Which is true of a cold front

Associated with continuous rain and ST clouds

Heavy convective weather and squall line

Similar slope as warm front

Less steeper than a warm front

40. Due to friction the wind

Strengthens and backs during landing

Strengthens and backs during take off

Decreases and backs during landing

Decreases and veers during landing

41. CAT is most likely to be encountered in

A high close to a dust storm

A sharp trough aloft with winds of jet stream speed

A ridge aloft

After the passage of a severe sandstorm

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

Oct - Nov

Apr - Jun

Dec - Mar

Jul - Sep

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

Indifferent

Unstable

Adiabatic

Stable

44. Gradient wind

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

Blows parallel to straight isobars

Is due to the balance between pressure gradient force and friction

Is super geostrophic in a low and subgeostrophic in a high

45. Flying conditions associated with CB during pre monsoon are

Rain, poor visibility, and turbulence

Hail, gusts, shower, and severe turbulence

Good visibility, drizzle, turbulence

Continuous rain, poor visibility, light turbulence

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

A/C altitude AMSL

Height of A/C above ARP in ISA

Height of A/C wheels above runway

Flight level

47. Gradient wind is weaker than geostrophic wind around a low because

Centripetal force is added to the pressure gradient force

Centripetal force is provided by pressure gradient force

Coriolis force is added to the pressure gradient force

Coriolis force is opposite to centripetal

48. Aquaplaning may occur in

-GR

-TS

Thick Fog

+RA

49. The main cause of seasons in India is

Thermal equator at equator whole year

Earth rotating around its own axis

Advection of air from Arabian sea

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

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

260P99 KT only

260P99 KT and complete wind in remark column

Only in remark column

260102 KT + 26002 KT

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