Vayudoot Aviation

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

15 deg C warmer than ISA

10 deg C warmer than ISA

10 deg C colder than ISA

15 deg C colder than ISA

2. 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

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

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

Cold side of core

About 3 km above the core

South side of core

at core

4. 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

5. During SW monsoon the winds above 500 hPa are

Strong Ely over S weak over N India

Wly over S and strong over N India

Ely over S weak Wly over N India

Wly over S and weak Wly over N India

6. What are Norwesters

Warm dry winds coming from NW

TS affecting NW India in premonsoon

TS of E and NE India in premonsoon

Severe Dust storm from NW

7. Aquaplaning may occur in

Thick Fog

+RA

-TS

-GR

8. Density altitude is

Lower if atmosphere is warmer than ISA

Higher if atmosphere is colder than ISA

Higher if atmosphere is isothermal

Higher if atmosphere is warmer than ISA

9. Diurnal variation of temperature is least

When winds are weak over the land surface

When sky is overcast

During land breeze over the coastal areas

When sky is clear

10. CAVOK in a METAR replaces

Wind, temp & pressure groups

Visibility, temp & cloud groups

Visibility, cloud and Wx groups

Wind, visibility & cloud groups

11. The main cause of seasons in India is

Thermal equator at equator whole year

Advection of air from Arabian sea

Earth rotating around its own axis

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

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

260P99 KT and complete wind in remark column

260102 KT + 26002 KT

260P99 KT only

Only in remark column

13. Which is not true of post monsoon

Frequency of tropical cyclones is max

Worst period for flying expect S India

Pressure gradient is weakest of all seasons

Monsoon withdraws from the country

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

ISA is QFF

ISA is QNH

ISA is QFE

Isothermal is QNH

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

Isobars, low pressure

Isobars, low temperature

Isotherms, low temperature

Isallobars, high temperature

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

Dew point

Dry bulb

Wet bulb

Ambient

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

Ely, S hemisphere

Wly, N hemisphere

Wly, S hemisphere

18. Wind shear in a TS is maximum

All sides of a CB

In SW sector

Beneath the cloud

Below the anvil

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

Dry, wet, land only

Warm & moist air, cold, both land & sea

Moist and cold, warm, land only

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

SS TS duration is more

SS TS duration is less

AM TS duration is more

AM TS occur in fronts

21. A cold front passes a station, the pressure

First decreases and then increases

First increases and then decreases

Change are very small

Rises continually

22. The term 'monsoon' means

Rains all over India

Seasonal reversal of winds and rainfall

One of the four seasons with maximum rain in the N

Monsoon circulation

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

Due to CO2 and H2O present in the air

Clouds radiate heat towards sky

Clouds prevent terrestrial radiations from escaping

Terrestrial radiation skip through clouds

24. Under what conditions severe icing is encountered

Temperature 0 deg C

Rain at temperature - 20 deg C

Visible vapour and temperature - 5 deg C

Rain and temperature below - 10 deg C

25. ITCZ affects weather over India during

Winters only

Pre - monsoon only

All the four seasons

Monsoon only

26. Ice accretion

Alters aerodynamics, reduces weight, and decrease lift

Alters aerodynamics, increases weight and lift

Increases drag and weight and stalling speed

Increases drag but reduces stalling speed

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

Transpiration

Evaporation

Deposition

Condensation

28. CAT is most likely to be encountered in

After the passage of a severe sandstorm

A sharp trough aloft with winds of jet stream speed

A ridge aloft

A high close to a dust storm

29. The axis of monsoon trough runs

Along central peninsula

In the Bay of Bengal

Along 22 deg East to West of India

Along the Gangetic plains

30. Flying conditions associated with CB during pre monsoon are

Good visibility, drizzle, turbulence

Hail, gusts, shower, and severe turbulence

Rain, poor visibility, and turbulence

Continuous rain, poor visibility, light turbulence

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

Absolutely stable

Indifferent

Stable

Absolutely unstable

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

A gap between two CB

No precipitation

Area free of clouds

Strong convective activity

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

Stable

Unstable

Adiabatic

Indifferent

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

12 hr; 2 hr

24 hr; 9 hr

9 hr; 2 hr

24 hr; 3 hr

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

Centripetal force is added to the pressure gradient force

Coriolis force is opposite to centripetal

Coriolis force is added to the pressure gradient force

Centripetal force is provided by pressure gradient force

36. ESNO is the name given to

Southern oscillations and La - Nino

El - Nino only

El - Nino and La - Nino combined

El - Nino and Southern oscillations

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

Frictional force is minimal

Pressure gradient force is negligible

Coriolis force is negligible

Geotropic force is maximum

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

Dec - Mar

Jul - Sep

Oct - Nov

Apr - Jun

39. Due to friction the wind

Strengthens and backs during take off

Decreases and veers during landing

Strengthens and backs during landing

Decreases and backs during landing

40. Will SPECI be issued if

Temperature change from 15 to 16 deg C

Visibility change from 6000 m to 4000 m

RVR change, from 1400 m to 1600 m

Wind change from 27010 KT to 29018 KT

41. Effect of wind shear

Decreasing head wind increases lift

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

42. Which is true of a cold front

Less steeper than a warm front

Associated with continuous rain and ST clouds

Similar slope as warm front

Heavy convective weather and squall line

43. 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

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

Height of A/C wheels above runway

Height of A/C above ARP in ISA

Flight level

A/C altitude AMSL

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

Reading will remain unchanged

Over read

Under read

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

Wly, increases

Wly, remains same

Ely, increases

Wly, decreases

47. Friction causes winds to get deflected ...........

Towards high

Towards low

Parallel to isobars

Perpendicular to isobars

48. Translucent rime ice forms due to

freezing of large supercooled water drops

Freezing of small supercooled water drops

Sublimation of large hail

Melting of large snow particles

49. Example of non frontal stability is

Squall line

Occlusion

Frontogenesis

Inversion

50. The two main seasons in India are

Winters and Hot season

Pre monsoon and SW monsoon

Hot season and Rainy season

Winter and SW monsoon

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