GATE XE discipline:engineering-sciences PYQs & Answers — Page 107

Questions 1061–1070 of 1772. Imported answers require independent review unless marked reviewed.

Consider tropical high-level clouds and low-level stratus clouds with bases at 12 km and 1 km above the surface of the Earth, respectively. Which of the following statement(s) is/are correct?

Your answerSelect all correct options. You can choose more than one.

High clouds are composed of ice crystals.

High clouds have a larger albedo than low clouds.

High clouds have a net warming effect on climate.

Low clouds have a net warming effect on climate.

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Which of the following statement(s) is/are correct in the context of Sverdrup transport?

Your answerSelect all correct options. You can choose more than one.

Sverdrup transport is always in the meridional direction.

Sverdrup transport is always orthogonal to the wind direction.

Sverdrup transport depends on the variation of the Coriolis parameter.

Sverdrup transport is only due to geostrophic currents.

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Which of the following statement(s) is/are true with regard to the Hadley circulation?

Your answerSelect all correct options. You can choose more than one.

The ascending branch is narrower than its descending branch.

Thunderstorms are more frequent in the subsiding region of the Hadley cell than in its ascending region.

The lower level winds between the ascending and descending branches of the Hadley cell are north-westerly.

Latent heat is transported from the subsiding to the ascending region of the Hadley cell.

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Which of the following statement(s) is/are true about the ocean circulation?

Your answerSelect all correct options. You can choose more than one.

Large-scale ocean surface currents are driven by winds.

Cold, dense and salty water forms in the North Atlantic Ocean.

Upwelling currents bring warm nutrient deficient water to the surface of the ocean.

Thermohaline circulation does not transport energy in the meridional direction.

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Coral reefs are found primarily in tropical and subtropical shallow seawaters. Which of the following statement(s) is/are correct?

Your answerSelect all correct options. You can choose more than one.

Corals require plenty of sunlight for photosynthesis and sunlight is abundant in the tropical and subtropical latitudes.

Corals grow optimally in seawater unsaturated in carbonate, which is found only in the tropical and subtropical oceans.

Corals grow optimally in fresh low-salinity water.

Corals grow optimally in water temperatures between 23°C and 29°C.

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In an incompressible fluid, the horizontal divergence is −0.01 s⁻¹. Then, the vertical velocity at 50 m above a flat surface is ____ m s⁻¹. Round off to one decimal place.

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In an atmosphere, temperature (T) decreases linearly with height above the ground (z), i.e., T(z) = T₀ − γ z, where γ is a constant. Surface pressure is 900 hPa. If the atmosphere is at rest, then the value of z at which the pressure decreases to half of that at the surface is ____ m (round off to the nearest integer).

Take acceleration due to gravity g = 10 m s⁻², gas constant R = 300 J kg⁻¹ K⁻¹, T₀ = 300 K and γ = 1/30 K m⁻¹, and the atmosphere behaves as an ideal gas.

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In a local Cartesian system, a zonal jet has a form u(y) = u₀ (1 − y²/L²), for −L ≤ y ≤ L. Here, y is the meridional distance measured from the axis of the jet and is positive northward. The vertical component of vorticity of this flow at y=L/2 is ____ s⁻¹. Round off to 3 decimal place.

Take u₀ = 50 m s⁻¹ and L = 5 km.

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An eastward flow with a speed of 10 m s⁻¹ goes from station M to station N, which are separated by a distance of 1 km. The temperature at station N is always higher than that at station M by 10 K. The absolute change in temperature due to advection at the mid-point between the stations in 50 s is ____ K (round off to nearest integer).

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Suppose, because of the doubling of atmospheric CO₂ concentration, an ocean water column receives an additional net energy input of 1 Wm⁻². If the entire water column of depth 1 km heats up uniformly, the water temperature will increase by 1 K in ____ years (round off to the nearest integer).

Assume all the additional heat added is retained and not lost. Take density of seawater = 1000 kg m⁻³; specific heat capacity of seawater = 4200 J kg⁻¹ K⁻¹.

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GATE XE discipline:engineering-sciences PYQs

Question 11

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Question 20