The most accurate method of finding the average depth of rainfall over an area is-
Anonymous Quiz
52%
(a) Isohyetal method
12%
(b) Arithmetic mean method
18%
(c) Thiessen polygon method
17%
(d) All of these
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Orographic precipitation occurs due to air masses lifted to higher altitudes by
Anonymous Quiz
19%
(a) The density differences of air masses
13%
(b) A frontal action
65%
(c) The presence of mountain barriers
3%
(d) Extra tropical cyclones
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In an area, if storms appear in every 10 years and the duration of each storm is 361 min, then the intensity of rainfall (mm/h) will be approximately given by
Anonymous Quiz
13%
(a) 15
44%
(b) 20
30%
(c) 25
13%
(d) 30
During temperature inversion in atmosphere air pollutants tends to
Anonymous Quiz
26%
(a) Accumulate above inversion layer
56%
(b) Accumulate below inversion layer
12%
(c) Disperse laterally
6%
(d) Disperse vertically
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Electrostatic precipitator is a device to control
Anonymous Quiz
5%
(a) SO2 emission
23%
(b) Particulate emission
58%
(c) Both SO2 and particulate emission
14%
(d) Precipitation of Al (OH)3 in water coagulation
A rainfall with an intensity of 5 mm/h is classified as
Anonymous Quiz
4%
(a) Trace
30%
(b) Light rain
60%
(c) Moderate rain
7%
(d) Heavy rain
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Cyclonic precipitation is caused by lifting of an air mass due to
Anonymous Quiz
59%
(a) Pressure difference
21%
(b) Temperature difference
19%
(c) Natural topographical barriers
1%
(d) None of these
Solid waste treatment by pyrolysis refers to
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27%
(a) Treating with chemicals before heating
9%
(b) No heating
28%
(c) Heating in presence of air
36%
(d) Heating in absence of air
In air pollution, PAN is:
Anonymous Quiz
10%
(a) peroxy acetyl nitride
28%
(b) peroxy acetyl nitrite
59%
(c) peroxy acetyl nitrate
3%
(d) None of the above
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The maximum damage to the Taj Mahal is because of the gas
Anonymous Quiz
19%
(a) CO2
12%
(b) CO
33%
(c) SO2
36%
(d) All of the above
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200 class room practice Surveying.pdf
2.1 MB
(In Both Language - English & Gujarati)
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In surveying, systematic error occurs due to
Anonymous Quiz
59%
(a) faulty instrument
10%
(b) bad weather
12%
(c) observer
19%
(d) variation in temperature
The shrinkage factor of an old map is 24/25 and the RF is 1/2400, then the corrected scale for the map is
Anonymous Quiz
52%
(a) 1/2500
18%
(b) 1/600
24%
(c) 1/2400
5%
(d) 1/60000
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A Vernier scale in which the smallest division is longer than the smallest division on the main scale; this Vernier is called as:
Anonymous Quiz
55%
(a) Retrograde vernier
26%
(b) direct vernier
13%
(c) double vernier
6%
(d) simple vernier
A graph showing variation of discharge with time, at a particular point of a stream is known as
Anonymous Quiz
57%
(a) hydrograph
10%
(b) none of three mentioned here
28%
(c) mass inflow curve
5%
(d) logistic curve
Mean precipitation over an area is best obtained based on gauged data using:
Anonymous Quiz
17%
(a) Thiessen method
26%
(b) Arithmetic mean method
29%
(c) Linearly interpolated isohyetal method
27%
(d) Orographically weighed isohyetal method
The standard height of a standard rain gauge is-
Anonymous Quiz
8%
(a) 10 cm
23%
(b) 20 cm
65%
(c) 30 cm
5%
(d) 40 cm
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Under the same conditions, which of the following shapes of water surface will give the highest rate of evaporation?
Anonymous Quiz
9%
(a) flat water surface
45%
(b) convex water surface
24%
(c) concave water surface
22%
(d) evaporation is independent of shape of water surface