Agro Meterorology Test - 1 — Agri Master Mind
The World Meteorological Organization (WMO) day falls on
- 23rd March
- 21st March
- 21st June
- 23rd December
It is the study of climatological and biological responses in both human being and animals
- Agroclimatology
- Phenology
- Biometeorology
- Microclimatology
The threshold temperature for majority of field crops are ranges from
- 0° to 5°C
- 4.5° to 12.0°C
- 4° to 8°C
- 10° to 15°C
The amount of heat is required to vaporize the unit mass of water
- Sensible heat
- Latent heat
- Soil heat
- Relative humidity
Photosynthetically active radiation (PAR) is measured by
- Albedomete
- Pyranometer
- Infrared thermometer
- Quantum sensor
The albedo of the crop surface is
- 10 12 %
- 15-20 %
- 15 – 30%
- 25 43 %
The phenomena in which water vapour converted into liquid form
- Evaporation
- Condensation
- Transpiration
- Evapotranspiration
The process of change of internal energy of a system with addition or withdrawal of heat is known as
- Lapse rate
- Non adiabatic process
- Temp. Inversion
- adiabatic process
The wind blows from sub-tropical high to sub-polar low is known as
- Trade winds
- Westerlies
- Polar easterlies
- Anticyclones
The unit of wind speed is
- Knot
- Millibar
- Okta
- Atmosphere
Cyclones and anticyclones are considered as
- Primary circulation
- Tertiary circulation
- Seasonal circulation
- Secondary circulation
It is comes under tertiary circulation of air over the earth's surface
- Mountain breezes
- Westeries
- Cyclones
- Cold waves
As per IMD classification, the number of meteorological sub-division in India is
- 25
- 127
- 36
- 133
Planning commission of India classified the number of agro-climatic regions of India is
- 8
- 15
- 10
- 25
Total number of Agro-climatic zones of India classified by NARP of ICAR
- 8
- 127
- 15
- 133
Type of weather forecast is mostly useful to agricultural operations
- Short range
- Long range
- Medium range
- Nowcasting
La Nina is associated with India as
- High rainfall and cold water temperature
- Scanty rainfall and cold water temperature
- High rainfall and high water temperature
- Scanty rainfall and high water temperature
If the rainfall deficit is more than 75 per cent of the normal is termed as
- Hydrological drought
- Severe drought
- Disaster drought
- Moderate drought
A moisture index (MI) is a ratio of
- Water deficit and PET
- Water deficit and AET
- Water Surplus and AET
- Water Surplus and PET
The difference of mean daily temperature and base temperature is called
- Potential evapotranspiration
- Heliothermal unit
- Growing degree day
- None
It is a temperature below which no growth takes place is known as
- Base temperature
- Optimum temperature
- Maximum temperature
- All
Heliothermal unit is the product of growing degree dayand
- Bright sunshine hours
- Photo temperature
- Humidity
- Day length
It is a temperature below which no growth take place
- Minimum threshold temperature
- Nycto- temperature
- Maximum threshold temperature
- Optimum temperature
Actual evapotranspiration (AET) can be directly measured by
- Pan Evaporimeter
- Rain gauge
- Lysimeter
- Hygrometer
Evapotranspiration is highest, when water supply is
- Limited
- Unlimited
- Scare
- Withdrawn
The quantity of heat absorbed or emitted, without change of temperature, during a change of state of unit mass of material.
- Sensible heat
- Specific heat
- Latent heat
- Absolute heat
The sum of incoming direct and diffused radiation is known as
- Global radiation
- Sky radiation
- Net radiation
- Long wave radiation
Time during a day when incoming and outgoing radiation is balance at earth's surface
- 1200 hr
- 800 hr
- 1400 hr
- 2400 hr
Ozone concentration in atmosphere is reduced by
- Methane
- Chlorofluorocarbon
- Carbon dioxide
- Nitrous oxide
Weather phenomenon takes place in which layer of atmosphere
- Troposphere
- Mesosphere
- Stratosphere
- Thermosphere
In winter, near the earth surface temperature increases with altitude is known as
- Lapse rate
- Isotherms
- Temperature Inversion
- Condensation
Due to which process latent heat of condensation is released in Atmosphere
- Dry adiabatic lapse rate
- Wet adiabatic lapse rate
- Isothermal lapse rate
- Inversion
In which condition of atmosphere actual lapse rate is equal than dry adiabatic lapse rate
- Stable
- Neutral
- Unstable
- None of these
Due to which force the moving air mass on earth surface is deflecting right and left side
- Pressure gradient force
- Gravitational force
- Coriolis force
- Frictional force
During day time wind blowing from sea to land is known as
- Land breeze
- Sea breeze
- Valley breeze
- Mountain breeze
The difference between net shortwave radiation and longwave radiation
- Net radiation
- Ground heat flux
- Sensible heat flux
- Energy balance
On irrigated crop field surface what is energy balance equation
- Rn H+ LE+G
- Rn = H+LE+G+P+M
- Rn H+ LE+G
- Rn H+ LE
Estimates of evaporation from free water surface is measured by
- Pshychrometer
- Lysimeter
- USWB class A pan
- Anenometer
Which climatic anomaly characterized by low temperature?
- Frost
- Drought
- Cyclone
- Flood
Which weather parameter help to disseminate the pathogens
- Radiation
- Relative humidity
- Temperature
- Wind
The first meteorological satellite was launched in the year
- 1950
- 1960
- 1970
- 1080
The head quarter of India Metrological Department (IMD) situated at
- Bombay
- New Delhi
- Pune
- Chennai
Global mean temperature has increased by
- 0.5°C
- 1.0°C
- 1.5°C
- 1.8°C
The World Meteorological Organization (WMO) is located at
- London
- Geneva
- Italy
- New Delhi
In troposphere, the value of wet adiabatic lapse rate is
- 4°C per km
- 9.8°C per km
- 6.5°C per km
- None
Isotherm lines on geographical map indicate
- Radiation variation
- Rainfall variation
- Temperature variation
- Pressure variation
Process in which heat and mass are transport horizontally in atmosphere
- Convection
- Radiation
- Advection
- None of these
The height of frictionless layer of atmosphere extends beyond
- 100 m
- 500 m
- 1000 m
- 1500 m
The total solar radiation absorbed by earth surface is about
- 25%
- 70%
- 47%
- 30%
The product of GDD and solar radiation
- PTU
- EDU
- SMGDD
- HTU
Plant activities are reduced significantly when the air temperature is
- 15-18°C
- 6-10°C
- 10-15°C
- below 6°C
For the study of climatology atleast how many years weather data is required
- 20
- 40
- 30
- 50
Autumn Equinox in northern hemisphere occur on
- 21st June
- 23rd September
- 21st March
- 22rd December
The average condition of weather over particular region is called as
- Atmosphere
- Climate
- Weather
- Environment
The earth moves around the sun with the greatest velocity at
- erihelion
- Autumn Equinoxes
- Aphelion
- Vernal Equinoxes
The most important variable of atmospheric constituents is
- Carbon dioxide
- Nitrogen
- Water vapor
- Dust
In which layer of atmosphere temperature increases with altitude
- Mesosphere
- Stratosphere
- Troposphere
- None
The process of change of internal energy of a system without addition or withdrawal of heat is known as
- Temperature Inversion
- Adiabatic process
- Non adiabatic process
- None
Which instrument records continuous atmospheric pressure on map?
- Thermograph
- Barograph
- Aneroid barometer
- None
The region which also called as Inter Tropical Conversion Zone (ITCZ)
- Doldrums
- Sub polar
- Sub-tropical
- Temperate zone
'Okta' is the unit of
- Visibility
- Fog density
- Rainfall
- Cloud cover
Type of precipitation occurs in mountain region is an example of
- Conventional precipitation
- Cyclonic precipitation
- Orographic precipitation
- Frontal precipitation
Which is the major constraint in dry land agriculture?
- High solar radiation
- Rainfall variability
- High wind speed
- Low relative humidity
When the rate of evaporation and transpiration deceases
- Air temperature increases
- Wind velocity increases
- Relative humidity increases
- Relative humidity decreases
Prolonged meteorological draught results in
- Agricultural droughts
- Seasonal drought
- Hydrological drought
- Contingent drought
Which statement(s) below is/are correct?
- Valleys are more susceptible to radiation fog than hill tops.
- Without the summer fog along the coast of California, redwoods would not grow well there.
- Fog can be composed of ice crystals.
- All of the above are correct.
Which of the following is the BEST indicator of the actual amount of water vapor in the air?
- air temperature
- saturation vapor pressure
- relative humidity
- dew point temperature
The lowest temperature that can be attained by evaporating water into the air is known as the:
- heat index.
- minimum temperature.
- wet-bulb temperature.
- frost point
If the air temperature remains constant, evaporating water into the air will_____ the dew point and ____ the relative humidity
- increase; increase
- increase; decrease
- decrease; increase
- decrease; decrease
The earth is tilted at an angle of 23.5 with respect to the plane of its orbit around the sun. If the amount of tilt were increased to 40, we would expect in middle latitudes:
- hotter summers and colder winters than at present.
- cooler summers and milder winters than at present.
- hotter summers and milder winters than at present.
- cooler summers and colder winters than at present.
The greatest variation in daily temperature usually occurs
- at the ground.
- about 5 feet above the ground.
- at the top of a high-rise apartment complex.
- at the level where thermals stop rising.
The earth's radiative equilibrium temperature is:
- the temperature at which the earth is absorbing solar radiation and emitting infrared radiation at equal rates.
- the temperature at which the earth is radiating energy at maximum intensity.
- the average temperature the earth must maintain to prevent the oceans from freezing solid.
- the temperature at which rates of evaporation and condensation on the earth are in balance
Solar radiation reaches the earth's surface as:
- ultraviolet radiation only.
- infrared radiation only.
- visible and infrared radiation only.
- ultraviolet, visible, and infrared radiation
Suppose last night was clear and calm. Tonight low clouds will be present. From this you would conclude that tonight's minimum temperature will be:
- higher than last night's minimum temperature.
- lower than last night's minimum temperature.
- the same as last night's minimum temperature.
- above freezing.
A change of one degree on the Celsius scale is a change of one degree on the Fahrenheit scale.
- equal to
- larger than
- smaller than
- is in the opposite direction of
A dim, "watery" sun visible through a gray sheet-like cloud layer is often a good indication of clouds.
- stratocumulus
- cirrostratus
- cumulonimbus
- altostratus
The heat energy released when water vapor changes to a liquid is called:
- latent heat of evaporation.
- latent heat of fusion.
- latent heat of fission.
- latent heat of condensation.
Which of the following has a wavelength shorter than that of violet light?
- blue light
- infrared radiation
- red light
- ultraviolet radiation
If the earth's average surface temperature were to increase, the amount of radiation emitted from the earth's surface would , and the wavelength of peak emission would shift toward wavelengths.
- increase; shorter
- increase; longer
- decrease; shorter
- decrease; longer
Charged particles from the sun that travel through space at high speeds are called:
- radiation.
- the aurora.
- solar wind.
- solar flares.
The aurora is produced by:
- reflections of sunlight by polar ice fields.
- fast-moving charged particles colliding with air molecules.
- burning oxygen caused by the intense sunlight at high altitude.
- the combination of molecular and atomic oxygen to form ozone.
The main reason(s) for warm summers in middle latitudes is that:
- the earth is closer to the sun in summer.
- the sun is higher in the sky and we receive more direct solar radiation.
- the days are longer.
- b and c only
Two objects, A and B, have the same mass but the specific heat of A is larger than B. If both objects absorb equal amounts of energy,
- A will become warmer than B.
- B will become warmer than A.
- both A and B will warm at the same rate.
- A will get warmer, but B will get colder.
A strong radiation inversion is more likely to occur on a:
- warm, windy night.
- cool, windy night.
- rainy night with light winds.
- clear night with light winds.
The processes of condensation and freezing:
- both release sensible heat into the environment.
- both absorb sensible heat from the environment.
- do not affect the temperature of their surroundings.
- do not involve energy transport.
At which temperature would the earth be radiating energy at the greatest rate or intensity?
- -40F
- 60F
- 32 F
- 105 F
More solar radiation is received at the:
- earth's surface.
- top of the atmosphere.
- north and south poles.
- None
The total mass of water vapor stored in the atmosphere at any moment is about of the world's supply of precipitation.
- 1 day
- 1 week
- 1 month
- 1 year
The name given to a liquid drop of dew that freezes when the air temperature drops below freezing is:
- black frost.
- hoarfrost.
- white frost.
- frozen dew
Which of the following statements is not correct?
- The length of human hair changes as the relative humidity changes.
- During the winter, low relative humidity can irritate the mucus membranes in the nose and throat.
- The relative humidity is a measure of the air's actual water vapor content.
- A change in the air temperature can change the relative humidity.
Fog that most often forms as warm rain falls into a cold layer of surface air is called:
- radiation fog.
- evaporation (mixing) fog.
- advection fog.
- upslope fog.
At which city might you be able to observe cirrus clouds at an altitude of 3,000 m (10,000 feet) above the surface?
- Barrow, Alaska
- Honolulu, Hawaii
- Miami, Florida
- Chicago, Illinois
How do red and blue light differ?
- Blue light has a higher speed of propagation.
- The wavelength of red light is longer.
- Red light has a higher intensity.
- Red and blue light have different directions of polarization.
The earth emits radiation with greatest intensity at:
- infrared wavelengths.
- radio wavelengths.
- visible wavelengths.
- ultraviolet wavelengths.
When a liquid thermometer is held in direct sunlight,
- it will accurately measure the air temperature.
- it will measure a much higher temperature than that of the air.
- it will measure a much lower temperature than that of the air.
- it will measure the temperature of the sun rather than the air.
Which of the following is the BEST indicator of the actual amount of water vapor in the air?
- air temperature
- saturation vapor pressure
- relative humidity
- dew point temperature
The term "latent" means:
- hot.
- light.
- hidden.
- dense
Of the gases listed below, which is NOT believed to be responsible for enhancing the earth's greenhouse effect?
- chlorofluorocarbons (CFCs)
- molecular oxygen (O2)
- nitrous oxide (N2O)
- carbon dioxide (CO2)
An increase in albedo would be accompanied by in radiative equilibrium temperature
- an increase
- a decrease
- no change
- unstable oscillation
If all the water vapor in the atmosphere were to condense and fall to the ground, the globe would be covered with about of water.
- 1 millimeter
- 1 inch
- 1 foot
- 1 meter