2. temperature

7/27/2019 2. Temperature

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TEMPERATURE

1. The measurement of surface temperature is madea) At ground levelb) At approx. 10 meters from ground levelc) At approx. 4 feet above ground leveld) At approx. 4 meters above ground level

2. The purpose of a Stevenson screen is toa) Maintain a moist atmosphere so that the wet bulb thermometer can function correctlyb) To prevent the mercury freezing in the low winter temperaturesc) Protect the thermometer from wind, weather and from direct sunshined) Keep the wet and dry bulb thermometers away from the surface extremes of

temperature

3. If temperature remains constant with an increase in altitude there isa) An inversionb) An inversion aloftc) Uniform lapse rated) An isothermal layer

4. The surface of the earth Is heated bya) Convectionb) Conductionc) Long wave solar radiationd) Short wave solar radiation

5. Cloud cover will reduce diurnal variation of temperature becausea) Incoming solar radiation is reflected back to space and outgoing terrestrial radiation is

reflected back to earth

b) Incoming solar radiation is re-radiated back to space and atmospheric heating byconvection will stop at the level of the cloud cover

c) The cloud stops the suns rays getting through to the earth and also reduces outgoingconduction

d)

Incoming solar radiation is reflected back to space and outgoing terrestrial radiation isre radiated from the cloud layer back to the surface

6. Diurnal variation of the surface temperature willa) Be unaffected by a change of wind speedb) Decrease as wind speed increasesc) Increase as wind speed increasesd) Be at a minimum in calm conditions

7. Which of the following surfaces is likely to produce a higher than average diurnal variation oftemperaturea) Rock or concrete


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b) Waterc) Snowd) Vegetation

8. Most accurate temperatures above ground level are obtained bya) Tephigramb) Aircraft reportsc) Temperature probed) Radio sonde

9. The method by which energy is transferred from one body to another by contact is calleda) Radiationb) Convectionc) Conductiond) Latent heat

10.The diurnal variation of temperature isa) Greater over sea than over landb) Less over desert areas then over temperate grasslandc) Reduced anywhere by the presence of cloudd) Increased anywhere as wind speed increases

11.The troposphere is heated largely bya) Absorption of the suns short wave radiationb) Radiation of heat from cloud tops and the earths surfacec) Absorption by ozone of the suns short wave radiationd) Conduction from the surface, convection and the release of latent heat

12.An inversion is one whicha) There is no horizontal gradient of temperatureb) There is no change of temperature with heightc) There is an increase of temperature as height increasesd)

There is a decrease of temperature as height increases

13.The sun gives out.. Amount of energy with wavelengths. Theearth gives out relatively .. Amounts of energy with relatively

.. Wavelengths.

a) Large, large, small , smallb) Small , small , large , largec) Large , large , small , larged) Large , small , small , large

14.With a clear night sky, the temperature change with height by early morning is most likely toshow


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a) A steady lapse rate averaging 2C/1000 feetb) A stable lapse rate of 1C/1000 feetc) An inversion above the surface with an isothermal layer aboved) An inversion from near the surface and a 2C/1000 feet lapse rate above

15.Over continents and oceans, the relative temperature conditions area) Warmer in winter over land, colder in summer over seab) Colder in winter over land, warmer in winter over seac) Col in winter over land and sead) Warmer in summer over land and sea

16.Diurnal variation of temperature is greatest when wind isa) Calmb) Lightc) Strong

17.Diurnal variation of temperature is maximum overa) Forestb) Oceanc) Land

18.On a clear day the amount of solar radiation received by earth surface isa) b) 30%c) 5/6

19.Albedo isa) Radiation received by earthb) Amount of heatc) Reflecting power of earth

20.During day the ambient temperature is.. than grounda)

Lower

b) Higherc) Same

21.Diurnal variation of temperature over ocean isa) More than landb) Above 3Cc) Less than 1C

22.At a coastal station the diurnal variation of temperature depends upona) Wind directionb) Wind speed


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c) Radiation23.Snow surface reflects about % of solar radiation

a) 75%b) 80%c) 90%

24.Amount of solar radiation received per unit area isa) Insolationb) Convectionc) Radiation

25.Solar radiation received by the earth isa) Long waveb) Albedoc) Short wave

26.Rise in temperature of a surface is proportional to its specific heata) Directlyb) Inverselyc) Not related

27.Specific heat of land is .. than that of watera) Lowerb) Samec) Higher

28.Minimum temperature is reached ata) Sunriseb) Mid nightc) -1 hour after dawn

29.Air parcel is lifted till it gets saturated. the temperature attained by it is calleda) Potential temperatureb) Dew point temperaturec) Wet bulb temperature

30.Cloudy nights area) Coldb) Normalc) Warm

31.Water vapour is transparent to terrestrial radiationa) Completely


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b) Partiallyc) Indifferent

32.Higher the temperature . Would be the wavelength of emitted radiationa) Longerb) Shorterc) Equal

33.Air is a bad conductor of heat. An air parcel of air can therefore be regarded as insulatedfrom the environment

a) Falseb) True

34.Warmer the earth will be the nocturnal radiationa) Intenseb) Weakerc) Moderate

35.Heat is the of the KE of all the molecules and atoms of a substancea) Sum totalb) Average

36.The solar radiation consists of about 46% ofa) UVb) IRc) Visible

37.The total energy radiated by a black body is proportional to its temperaturea) T2b) T3c) T4

38.Intense radiation are emitted bya) Hot bodiesb) Cold bodiesc) Stars

39.The wavelength of most intense radiation is inversely proportional to itsa) Absolute temperatureb) Humidityc) Albedo

40.Hot bodies like sun radiatea) Short waves


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b) Long wavesc) Both

41.The flow of heat from earth surface is 77% bya) Sensible heatb) Latent heat

42. -40C = -40Fa) Trueb) False

43.Surface temperature is recorded at a height of .. above grounda) 1.5Mb) 1.25Mc) 2M

44.The door of Stevensons screen should opena) Opposite to the sunb) Into sunc) Any direction

45.The liquid used in minimum thermometer isa) Mercuryb) Alcoholc) Spirit

2. temperature

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