FLUID-MECHANICS-QUIZ-6

FLUID MECHANICS QUIZ-6

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 large ship can float but a steel needle sinks because of

•  Viscosity
•  Surface tension
•  Density
•  None of these

Solution

Q2.A film of water is found between two straight parallel wires of length 10 cm each separated by 0.2 cm. If their separation is increased by 1 mm, while still maintaining their parallelism, how much work will have to be done? (surface tension of water is 7.2×10^-2 Nm^-1

•  7.22×10^-6 J
•  1.44×10^-5 J
•  2.88×10^-5 J
•  5.76×10^-5 J

Solution

Q3.  A wooden ball of density ρ is immersed in water of density ρ₀ to depth h and then released. The height H above the surface of water up to which the ball jump out of water is

•  Zero
•  h
•  (ρ₀ h)/ρ
•  (ρ₀/ρ-1)h

Solution

Q4. A given shaped glass tube having uniform cross section is filled with water and is mounted on a rotatable shaft as shown in figure. If the tube is rotated with a constant angular velocity ω then

•  Water levels in both sections A and B go up
•  Water level in Section A goes up and that in B comes down
•  Water level in Section A comes down and that in Bit goes up
•  Water levels remains same in both section

Solution

Q5.An adulterated sample of milk has density of 1032 kg m^-3, while pure milk has a density of 1080 kg m^-3. Then the volume of pure milk in a sample of 10 L of adulterated milk is

•  0.5 L
•  1 L
•  2 L
•  4 L

Solution
 

Q6. Angle of contact of a liquid with a solid depend on

•  solid only
•  liquid only
• solid and Liquid
•  orientation of the solid surface in liquid

Solution

Q7.The glycerin of density 1.25×10³kgm^-3 is flowing through a conical tube with end radii 0.1 m and 0.04 m respectively. The pressure difference across the ends is 10 Nm^-2. The rate of flow of glycerine through the tube is

•  6.4×10^-2 m²s^-1
•  6.4×10^-4m³ s^-1
•  12.8×10^-2 m³ s^-1
•  12.8×10³ m³ s^-1

Solution

Q8.Water is flowing through a horizontal pipe of non-uniform cross-section. At the extreme narrow portion of the pipe, the water will have ?

•  Maximum speed and least pressure
•  Maximum pressure and least speed
•  Both pressure and speed maximum
•  Both pressure and speed least

Solution

Q9.A river of salty water if flowing with a velocity 2 ms^-1. If the density of the water is 1.2 gcc^-1, then the kinetic energy of each cubic meter of water is

•  2.4 J
•  24 J
•  2.4 Kj
•  4.8 kJ

Solution

Q10. The cylindrical tube of spray pump has a cross-section of 8cm^2, one end of which has 40 fine holes each of area 10^-8 m². If liquid flows inside the tube with a speed of 0.15 m min^-1, the speed with which the liquid is ejected through the hole is

•  50 ms^-1
•  5 ms^-1
•  0.05 ms^-1
• 0.5 ms^-1

Solution