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mcq on Fluid Flow. We covered all the mcq on Fluid Flow in this post for free so that you can practice well for the exam.
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mcq on Fluid Flow for Students
Why do two ice cubes stick together when pressed firmly?
(a) Applying pressure lowers the melting point of ice
(b) Applying pressure increases the melting point of ice
(c) The melting point remains the same regardless of pressure
(d) Ice always melts at 0°C
Option a – Applying pressure lowers the melting point of ice
When an object is electrically charged by friction, what happens to its weight?
(a) It stays exactly the same
(b) It experiences a slight increase
(c) It undergoes a slight decrease
(d) It might either slightly increase or decrease
Option d – It might either slightly increase or decrease
An oil tanker is partially filled and accelerates uniformly on a level road. What happens to the oil’s surface?
(a) It stays level and horizontal
(b) It tilts with the rear end having less depth
(c) It tilts with the rear end having more depth
(d) It forms a parabolic surface
Option c – It tilts with the rear end having more depth
Which of the following is not caused by surface tension?
(a) Formation of vapor above the liquid surface
(b) A curved meniscus shape
(c) Capillary rise of a liquid
(d) Spherical droplets of mercury on the floor
Option c – Capillary rise of a liquid
Which of the following statements is accurate?
(a) Water makes an acute angle with glass; mercury forms an obtuse angle
(b) Water forms an obtuse angle with glass; mercury forms an acute angle
(c) Both water and mercury form acute contact angles with glass
(d) None of the statements are accurate
Option a – Water makes an acute angle with glass; mercury forms an obtuse angle
Which petroleum product has the lowest boiling point?
(a) Kerosene
(b) Diesel
(c) Petrol (gasoline)
(d) Lubricating oil
Option c – Petrol (gasoline)
What happens to the surface tension of water when common Salt is dissolved in it?
(a) It increases
(b) It decreases
(c) It may rise or fall based on the Salt
(d) No change occurs
Option a – It increases
What is the behavior of an oil droplet placed on the surface of water?
(a) It stays on top as a spherical droplet
(b) It spreads out into a thin film
(c) It forms a mix of film and droplet
(d) It floats in a distorted shape
Option b – It spreads out into a thin film
If two soap bubbles of different sizes are connected, what will occur?
(a) Air will move from the larger to the smaller until both equalize
(b) Their sizes remain unchanged
(c) Air flows from the smaller to the larger, enlarging the latter
(d) Both bubbles adjust their sizes to match each other eventually
Option c – Air flows from the smaller to the larger, enlarging the latter
Why is glue mixed with paint before applying it to walls?
(a) To improve adhesion between the paint and wall
(b) To reduce the paint’s adhesion to the wall
(c) To reduce cohesion between the paint particles
(d) For no particular reason
Option a – To improve adhesion between the paint and wall
When the adhesive force between a liquid and its container is much weaker than the liquid’s cohesive force, how will the surface appear?
(a) Flat and horizontal
(b) Vertical in shape
(c) Concave in form
(d) Convex in shape
Option d – Convex in shape
Which of the following statements are correct?
(a) Gas viscosity generally increases with temperature
(b) Liquid viscosity is directly influenced by pressure
(c) Gas viscosity doesn’t depend on pressure
(d) All of the above
Option d – All of the above
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