List of practice Questions

A cylindrical tank containing water is rotating about the z-axis at a constant angular velocity of 10 rad s$^{-1}$. The schematic of the isobaric surface is shown below, where ‘A’ and ‘B’ are two points on the isobaric surface at heights $z_1$ and $z_2$, respectively. Assuming negligible atmospheric pressure and no transient flow, estimate the elevation difference in m between $z_1$ and $z_2$. (Given: $r_1 = 0.5 \, m$, $r_2 = 1.0 \, m$, $g = 9.8 \, m/s^2$, $\omega = 10 \, rad/s$).
There are 295 million vehicles across India driving about 12000 km yr$^{-1}$. Each vehicle consumes about 25 km l$^{-1}$ of petrol, and the amount of carbon released per litre is 5.5 g. What is the amount of carbon emitted into the atmosphere in mega tons per year?
Two parallel isobars are separated by 250 km at 30°N with air density = 0.70 kg/m$^3$, Coriolis parameter $f = 2\Omega \sin \phi$ (where $\Omega = 14.6 \times 10^{-5}$ rad/s), and pressure gradient = 5 hPa. Calculate the geostrophic velocity in m/s.
Considering a gyre system (shown in the figure) where ‘L’ and ‘H’ represent low- and high-pressure regions along 45°N, the average slope between points ‘A’ and ‘B’ is 2.1 cm km$^{-1}$ under no-wind condition. For a steady southerly wind of 10 m s$^{-1}$ over these regions, find out the magnitude of the current velocity in m s$^{-1}$ (rounded off to two decimal places).
Which among the following gases has the highest global warming potential?
What will happen to the speed of a balanced flow as one moves across the isobar along a particular latitude?
The following illustration depicts the circulation pattern in the North Indian Ocean during the southwest (June–August) monsoon. Identify the markers numbered from 1–5 in the illustration and pick out the right choice.
From the following list identify the region that has low chlorophyll and low nutrients.
Choose the correct statement(s) in context to Ekman spiral from the following:
Which of the following is/are associated with winter rainfall over India?
Which classification of tides best represents the west coast of India?
The variation in geostrophic winds with height, at the atmospheric boundary layer, considering variation in pressure gradient as a function of height, is referred to as ..................
Consider the following options and pick out the right choice. The solubility of a gas in sea water increases with ...............
From the list given below, identify the organism type in the biological pump that takes up carbon dioxide from the atmosphere into the ocean.
The amount of CO$_2$ that can be absorbed ............... when the temperature of seawater decreases.
Identify the correct pair(s) of governing law with respective process operation.
A hammer mill is used to grind blackgram. The size distribution is such that 80% passes through a 6-mesh (3.36 mm) screen. The power required to produce a powder where 80% passes through a 45-mesh (0.354 mm) screen is 4.5 kW. Find the power in kW required to produce a finer powder, 80% of which passes through a 60-mesh (0.25 mm) screen. Use Bond’s law of size reduction.
If $D_{10}$ for {Salmonella} in egg yolk is 0.75 kGy, calculate the radiation dose in kGy (rounded off to 2 decimal places) required for reducing the {Salmonella} count in egg yolk by 8 log cycles.
The average moisture binding energy of a plant protein-based snack at 8% moisture content (dry basis) is 3200 cal.mol$^{-1}$. If the water activity of the snack at the above moisture content is 0.30 at 30°C, the water activity of the sample at 45°C is ............. (rounded off to 2 decimal places). Use $R = 1.987$ cal.mol$^{-1}$.K$^{-1}$.
Cow milk is pasteurized at a flow rate of 1 kg.s$^{-1}$ in a counter-current heat exchanger using hot water as the heating medium. The milk enters at 15°C and exits at 50°C. The specific heat of milk is 3.5 kJ.kg$^{-1}$.°C$^{-1}$. Hot water enters at 75°C and exits at 60°C. Overall heat transfer coefficient $U = 1800$ W.m$^{-2}$.°C$^{-1}$. Find the heat transfer surface area in m$^2$ (rounded off to 2 decimal places). Assume steady-state.
The net water level elevation near the coast arising due to a tropical-cyclone-induced storm is a combination of the following factors ................
The typical speeds of a tsunami wave in water depths of 10 m, 100 m, and 1000 m, respectively, are ................
Match the enzyme in Column I with its application in food processing/reaction given in Column II.
Identify the Gram +ve bacteria responsible for causing food borne diseases among the following.
Extrusion cooking is accomplished in four different stages (I, II, III, IV). Identify the correct order from the given options.