FLUID-MECHANICS-QUIZ-4

FLUID MECHANICS QUIZ-4

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. At critical temperature, the surface tension of a liquid is

•  Zero
•  Infinity
•  Cannot be determined
•  The same as that at any other temperature

Solution

Q2.A metal plate of area 10³cm² rests on a layer of oil 6 mm Type equation here. thick. A tangential force of 10^-2 N is applied on it to move it with a constant velocity of 6 cms^-1. The coefficient of viscosity of the liquid is

•  0.1 poise
•  0.5 poise
•  0.7 poise
•  0.9 poise

Solution

Q3.  If two soap bubble of different radii are connected by a tube

•  Air flows from the bigger bubble to the smaller bubble till the sizes become equal
•  Air flows from the bigger bubble to the smaller bubble till the sizes are interchanged
•  Air flows from the smaller bubble to the bigger
•  There is no flow of air

Solution

Q4. The meniscus of mercury in a capillary glass tube, is

•  Concave
•  Plane
•  Cylindrical
•  Convex

Solution

Q5.A glass tube 80 cm long and open at both ends is half immersed in mercury. Then the top of the tube is closed and it is taken out of the mercury. A column of mercury 20 cm long then remains in the tube. The atmospheric pressure (in cm of Hg) is

•  90
•  75
•  60
•  45

Solution
 

Q6. A triangular lamina of area A and height h is immersed in a liquid of density ρ in a vertical plane with its base on the surface of the liquid. The thrust on the lamina is

•  1/2 Aρgh
•  1/3 Aρgh
• 1/6 Aρgh
•  2/3 Aρgh

Solution

Q7.A small spherical ball of steel falls through a viscous medium with terminal velocity. If a ball of twice the radius of the first one but of the same mass is dropped through the same method, it will fall with a terminal velocity

•  v/2
•  v/√2
•  v
•  2v

Solution

Q8.A jar shown in figure is filled with a liquid of density ρ. The jar is placed in vacuum. Cross-section of the jar is circular and base is having a radius R. The force exerted by the liquid column on the base of the jar is

•  ρ g(a+b+c)πR²
•  Less than ρ g(a+b+c)πR²
•  Greater than ρ g(a+b+c)πR²
•  2ρ g(a+b+c)πR²

Solution

Q9.A sniper fires a rifle bullet into a gasoline tank making a hole 53.0 m below the surface of gasoline. The tank was sealed at 3.10 atm. The stored gasoline has a density of 660 kgm^-3. The velocity with which gasoline begins to shoot out of the hole is

•  27.8ms^-1
•  41.0ms^-1
•  9.6ms^-1
•  19.7 ms^-1

Solution

Q10. The work done in increasing the size of a rectangular soap film with dimensions 8cm×3.75 cm to 10cm×6cm is 2×10^-4 J. The surface tension of the film in Nm^-1 is

•  1.65×10^-2
•  3.3×10^-2
•  6.6×10^-2
• 8.25×10^-2

Solution