FLUID-MECHANICS-QUIZ-1

FLUID MECHANICS QUIZ-1

Dear Readers,

As per analysis for previous years, it has been observed that students preparing for NEET find Physics out of all the sections to be complex to handle and the majority of them are not able to comprehend the reason behind it. This problem arises especially because these aspirants appearing for the examination are more inclined to have a keen interest in Biology due to their medical background. 

Furthermore, sections such as Physics are dominantly based on theories, laws, numerical in comparison to a section of Biology which is more of fact-based, life sciences, and includes substantial explanations. By using the table given below, you easily and directly access to the topics and respective links of MCQs. Moreover, to make learning smooth and efficient, all the questions come with their supportive solutions to make utilization of time even more productive. Students will be covered for all their studies as the topics are available from basics to even the most advanced. 

Q1. A thin uniform cylindrical shell, closed at both ends, is partially filled with water. It is floating vertically in water in half-submerged state. If ρ_c is the relative density of the material of the shell with respect to water, then the correct statement is that the shell is

•  More than half filled if ρ_c is less then 0.5
•  More than half filled if ρ_c is less then 1.0
•  Half filled if ρ_c is less then 0.5
•  Less than half filled if ρ_c is less then0.5

Solution

Q2.A container with square base of side a height H with a liquid. A hole is made at a depth h from the free surface of water. With what acceleration the container must be accelerated, so that the water does not come out?

•  G
•  g/2
•  2gH/2
•  2gh/a

Solution

Q3.  From a steel wire of density ρ is suspended a brass block of densityρ_B. The extension of steel wire comes to l. If the brass block is now fully immersed in a liquid of density ρ_L, the extension becomes l'. The ratio l/l' will be

•  (ρ_B-ρ)/(ρ_L-ρ)
•  ρ_L/(ρ_B-ρ_L )
•  (ρ_B-ρ_L)/ρ_B
•  ρ_B/(ρ_B-ρ_L )

Solution

Q4. The pressure on a swimmer 20 m below the surface of water at sea level is

•  1.0 atm
•  2.0 atm
•  2.5 atm
•  3.0 atm

Solution

Q5.Bernoulli’s principle is not involved in the working/explanation of

•  Movement of spinning ball
•  Carburetor of automobile
•  Blades of a kitchen mixer
•  Heart Attack

Solution
 

Q6. A soap bubble A radius 0.03 and another bubble B of radius 0.04 m are brought together so that the combined bubble has a common interface of radius r, then the value of r is

•  0.24 m
•  0.48 m
• 0.12 m
•  None of These

Solution

Q7.A large tank is filled with water to a height H. A small hole is made at the base of the tank. It takes T₁ time to decrease the height of water to H/η (η>1): and it takes T₂ time to take out the rest of water. If T₁=T₂, then the value of η is

•  2
•  3
•  4
•  2√2

Solution

Q8.A piece of wax weighs 18.03 g in air. A piece of metal is found to weigh 17.03 g in water. It is tied to the wax and both together weigh 15.23 g in water. Then, the specific gravity of wax id

•  18.03/17.03
•  17.03/18.03
•  18.03/19.83
•  15.03/17.03

Solution

Q9.A small sphere of mass m is dropped from a great height. After it has fallen 100 m, it has attained its terminal velocity and continues to fall at that speed. The work done by air friction against the sphere during the first 100 m of fall is

•  Greater than the work done by air friction in the second 100 m
•  Less than the work done by air friction in the second 100 m
•  Equal to 100 mg
•  Greater than 100 mg

Solution

Q10. If a drop of water is broken in to smaller drops the surface energy

•  Increases
•  Decreases
•  Remain Unchanged
• Can increases as well as decreases

Solution