Questions for MET REGULAR SEP 2023

ADDITIONAL QUESTIONS

Answer the following questions

#1. The main cause of occurrence of weather over the earth surface is

Weather occurs due to variation in insolation over the Earth.

#2. Thermal lows are generally located over

Thermal lows form in equatorial regions due to high heating.

#3. The main cause of ground inversion is

Ground inversion is caused by radiation cooling at night under calm and clear conditions.

#4. Above the friction layer winds mostly blow parallel to isobars due to balance of

Above the friction layer, the geostrophic wind occurs due to balance between Coriolis and pressure gradient forces.

#5. Wind at 1 km height is 320/20 kt whereas surface wind is 260/05 kt because of

The reduction in wind speed and change in direction near surface is due to friction with terrain.

#6. The amount of water vapour which air can hold depends on

Dew point temperature indicates the maximum water vapour air can hold at a given temperature.

#7. In general circulation over the globe the equatorial low pressure belt is at the junction of which cells ?

The equatorial low pressure belt lies at the junction of Hadley and Ferrel cells.

#8. The dew point temperature

Dew point increases with more water vapour content in air.

#9. What controls the movement of most TS ?

Thunderstorm movement is mainly controlled by winds at 500-700 hPa level.

#10. Isohyets are the line of equal

Isohyets connect points of equal rainfall.

#11. How much in advance of departure a pilot must notify the Aeronautical Met Station (AMS) requiring Met Forecast for a national flight ?

Advance notice of 18-24 hours is needed for a national flight MET forecast.

#12. An a/c cruising at FL500 in July from Chennai to Trivandrum will generally experience

At FL500 over south India in July, subtropical westerly winds prevail.

#13. The sun is highest at noon, but two/three hours later the earth receives more radiation. Hence maximum temperature is around 1500 hr. It is due to

Thermal inertia causes maximum temperatures to occur later than solar noon.

#14. Which of the following Indian month corresponds to Grishm Ritu

Grishm Ritu corresponds to Jyeshtha and Asadha months in India.

#15. Due to Coriolis force an Ely wind blowing over the equator will

Coriolis force is minimal near equator; the easterly wind weakens slightly.

#16. The surface wind at coastal stations on west coast of India during late night/early morning in pre-monsoon season is

Pre-monsoon night winds are generally northerly along the west coast.

#17. Convective clouds develop at a place when the atmosphere is

Convective clouds form in absolutely stable or unstable air depending on lifting.

#18. In a SPECI report the QNH 1005.8 hPa is reported as

QNH is rounded to the nearest whole hPa: 1005 hPa.

#19. Stability of atmosphere is determined by

Environmental Lapse Rate (ELR) determines atmospheric stability.

#20. The characteristics features, good visibility and turbulence, are of

Unstable air has turbulence and good visibility features.

#21. Extreme turbulence in a TS can be assessed from

Hail presence indicates extreme turbulence in thunderstorms.

#22. Jet streams are strongest when temperature gradient are greatest

Jet streams intensify where horizontal temperature gradients are strong.

#23. While planning to land during TS, which is the most expected serious aviation hazard

Wind shear and turbulence pose the greatest hazard during landing in TS.

#24. In an arid area the cloud which is capable of causing Dust Storm is

Cumulus clouds can trigger dust storms in arid regions.

#25. If after the issue of a SPECI, conditions continue to be below the prescribed limit then the next routine report will be a

The next routine report could be METAR or SPECI depending on conditions.

#26. Fronts are characteristics of

Fronts are primarily features of extra-tropical depressions.

#27. In India in a VOLMET broadcast

VOLMET broadcast includes METAR, SPECI, SIGMET and TAF.

#28. In a SPECI the lowest layer of clouds, regardless of amount, is reported as

The lowest layer is always reported with FEW, SCT, BKN or OVC regardless of amount.

#29. The atmospheric pressure at an aerodrome is equal to the MSL pressure then

When pressure at aerodrome equals MSL pressure, QNH equals QFE.

#30. An a/c at FL180 in July from Kolkata to Mumbai will generally experience

Westerly winds prevail at that altitude and season.

#31. Isopicnic are the line of constant

Isopicnic lines represent constant geopotential height.

#32. The minimum notice required to be given to an aerodrome Met office (AMO) by an aircraft operator needing Met data for a National flight is

Minimum 6-hour notice is required for national flight MET data.

#33. METAR VIAG 250300Z 27005KT 1200 + SHRA FEW008 SCT025 BKN080 28/25 Q1004 TEMPO 0405 0800 + TSRA FEW020 CB OVC300 = In the METAR surface visibility in TS is

Surface visibility reported is 1200 m.

#34. The upper air report from an a/c other than weather reconnaissance a/c has the identification code as

VOLMET is the code for upper air reports from normal aircraft.

#35. 'TAF AMD' covers validity period

TAF AMD applies only for the remaining validity period of the original TAF.

#36. RVR is a measure of

RVR measures the atmospheric transparency, runway lights intensity, and background illumination.

#37. SPECI is issued when the visibility changes from

SPECI is issued for visibility changes from 300 m to 400 m.

#38. During pre-monsoon the pressure gradient in the S parts of East coast of India is from

Pressure gradient is generally from North to South along the coast.

#40. The lapse rate of temperature in a low level inversion is

Low level inversion has a positive lapse rate (temperature increases with height).

#41. Which of the following Indian month corresponds to Rainy season/Varsha Ritu

Varsha Ritu corresponds to Shravana and Bhadrapad months.

#42. The Code Name for an aviation forecast in figure code for a specific area is

ARFOR is the code name for area-specific aviation forecasts in figure code.

#43. SIGMET message is

SIGMET contains actual or expected en-route weather affecting flight safety.

#44. Which of the following Indian month corresponds to Winter/Shishira Ritu

Shishira Ritu corresponds to Magha and Phalguna.

#45. The variable surface wind speed refers to

Variable surface wind speed is less than 3 KT.

#46. Which of the following Indian month corresponds to Sharad Ritu (Post monsoon)

Sharad Ritu (post-monsoon) corresponds to Asauj and Kartika months.

#47. TAF VECC 2203000 2400KT 3000FU SCT030 BECMG 0406 6000 SCT030 BKN100 TEMPO 0708 2000 TSRA SCT20CB OVC080= The above TAF forecasts TS and RA between

The TEMPO group 0708 refers to 0700–0800 UTC.

#48. The hailstones occur from

Hail can occur in both warm and cold clouds.

#49. SPECI is issued when the height of base of the lowest cloud layer > 5/8 changes to or passes

SPECI is issued at these thresholds of cloud base height.

#50. Fog is produced in Fronts by

Adiabatic cooling at fronts produces fog.

#51. Over the earth deserts are located in the regions of

Deserts are mostly under the subtropical high-pressure belts.

#52. The air can hold more moisture at MSL over the

Air holds the maximum moisture at equatorial regions.

#53. With altitude in an isothermal atmosphere the density of the air

Air density decreases with height even in isothermal atmosphere.

#54. The Fronts associated with WDs over NW India in winters are mostly

Winter depressions (WDs) mostly bring cold fronts over NW India.

#55. In a Cold Occlusion the

Cold occlusion occurs when the cold front air is colder than warm front air.

#56. A day is called Rainy Day when the amount of Rainfall in a day is

Minimum rainfall of 1.0 mm defines a rainy day.

#57. A cold front is defined as the

Cold front occurs when advancing cold air undercuts warm air.

#58. In a METAR the third layer of clouds is reported when amount is

The third layer is reported if it covers 5/8 or more BKN or OVC.

#59. SPECI is issued for RVR when it changes or passes

RVR changes by 200m trigger SPECI issuance.

#60. Above which datum the cloud base is reported at airports?

Cloud base is reported above the aerodrome level.

#61. For International Flight documentation, the following data is provided

International flight documentation includes SIGWX and upper wind/temperature charts.

#62. When visibility is 800 m to 5000 m, in a METAR it is reported in steps of

METAR reports visibility in 100 m steps in this range.

#63. The Polar Front is

The Polar Front is a non-continuous boundary.

#64. Most of the weather occurring in India is due to

Indian weather is largely influenced by the monsoon trough.

#65. The Doppler Weather Radar works on the principles of

Doppler radar measures change in frequency (Doppler effect).

#66. Flight forecast in "Chart form of Documentation" supplied in India consists of

Flight forecasts include SIGWX chart and upper air charts at 850, 500, 300 hPa.

#67. SIGMET message contains weather information which is

SIGMET reports actual or expected weather affecting aviation safety.

#68. Veering of geostrophic wind at a station with height indicates

Wind veering with height indicates warm air advection.

#69. The wind Bora is a

Bora is a cold katabatic wind.

#70. Will a SPECI be issued when the mean speed has changed by

SPECI is issued when mean speed changes by 10 kt or more.

#71. Highest annual rainfall over the earth occurs the regions?

Equatorial regions receive the highest annual rainfall.

#72. The most hazardous area for aviation in a cyclone is

The wall cloud around the eye is most hazardous for aviation.

#73. The ITCZ

ITCZ usually lies along the Equatorial Trough.

#74. The strong Wly winds which blow in both the hemispheres between 35° and 60° Lat are called

Strong westerlies between 35°–60° latitude are called Roaring Forties.

#75. Cold core low pressure system

Cold-core low pressure systems intensify with height.

Answer any or all questions; click “Finish Quiz” to see your score.

Questions for MET REGULAR SEP 2023

ADDITIONAL QUESTIONS

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