Fluid Mechanics · Physics · COMEDK

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MCQ (Single Correct Answer)

COMEDK 2024 Evening Shift
What is the relation obeyed by the angles of contact $$\theta_1, \theta_2$$ and $$\theta_3$$ of 3 liquids of different densities $$P_1, P_2$$ and $$P_...
COMEDK 2024 Morning Shift
64 rain drops of the same radius are falling through air with a steady velocity of $$0.5 \mathrm{~cm} \mathrm{~s}^{-1}$$. If the drops coalesce, the t...
COMEDK 2023 Morning Shift
A block of wood floats in water with $$(4 / 5)$$ th of its volume submerged. If the same block just floats in a liquid, the density of the liquid is (...
COMEDK 2023 Morning Shift
A balloon with mass $m$ is descending down with an acceleration $$a$$ (where, $$a ...
COMEDK 2023 Morning Shift
The speeds of air-flow on the upper and lower surfaces of a wing of an aeroplane are $$v_1$$ and $$v_2$$, respectively. If $$A$$ is the cross-sectiona...
COMEDK 2023 Evening Shift
Water from a tap of cross-sectional area $$1 \mathrm{~cm}^2$$, falls vertically downwards at $$2 \mathrm{~m} / \mathrm{s}$$. The cross sectional area ...
COMEDK 2022
A raft of density 600 g/m$$^3$$ and mass 120 kg floats in water. How much weight can be put on the raft to make it just sink?
COMEDK 2022
Water is poured in a tank through a cylindrical tube of area of cross-section A and ejecting water at a constant speed 4 m/s. the tank contains a hole...
COMEDK 2021
According to Pascal's law, pressure in a fluid at rest is the same at all points, if
COMEDK 2021
The surface tension of a liquid at its boiling point
COMEDK 2020
A ball floats on the surface of water in a container exposed to the atmosphere. When the container is covered and the air is partially removed, then t...
COMEDK 2020
A frame made of metallic wire enclosing a surface area A is covered with a soap film. If the area of the frame of metallic wire is reduced by 50%, the...
COMEDK 2020
A fluid is in streamline flow across a horizontal pipe of variable area of cross-section. For this which of the following statements is correct?...
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