NEET Physics: Mechanical Properties of Fluids — MCQ Test 7

Q6. An aircraft (\( m = 2.5 \times 10^5 \, \text{kg} \), wing area \( 400 \, \text{m}^2 \)) flies at \( 900 \, \text{km/h} \). What is the pressure difference across the wings? (Take \( g = 10 \, \text{m/s}^2 \), \( \rho_{\text{air}} = 1.2 \, \text{kg/m}^3 \))

Q7. Water flows at \( 2.5 \, \text{m/s} \) at \( 3 \, \text{m} \) height with pressure \( 1.5 \times 10^5 \, \text{Pa} \). What is the pressure at \( 1 \, \text{m} \) height with speed \( 3.5 \, \text{m/s} \)? (\( \rho = 1000 \, \text{kg/m}^3 \), \( g = 9.8 \, \text{m/s}^2 \))

Q8. What is the total pressure at a depth of \( 1.6 \, \text{m} \) in air (\( \rho = 1.29 \, \text{kg/m}^3 \)) with atmospheric pressure \( 1.01 \times 10^5 \, \text{Pa} \)? (Take \( g = 9.8 \, \text{m/s}^2 \))

Q9. A soap film supports \( 2.4 \times 10^{-2} \, \text{N} \) over a \( 48 \, \text{cm} \) slider. What is the surface tension?

Q10. A sphere of radius \( 0.035 \, \text{m} \) moves at \( 0.09 \, \text{m/s} \) through glycerine (\( \eta = 0.83 \, \text{Pa s} \)). What is the viscous drag force?

Q11. A manometer with ethyl alcohol (\( \rho = 806 \, \text{kg/m}^3 \)) shows a height difference of \( 0.3 \, \text{m} \). What is the pressure difference? (Take \( g = 10 \, \text{m/s}^2 \))

Q12. What is the force on a submarine window (\( 0.07 \, \text{m}^2 \)) at \( 350 \, \text{m} \) depth in seawater (\( \rho = 1.03 \times 10^3 \, \text{kg/m}^3 \)), interior at atmospheric pressure? (Take \( g = 10 \, \text{m/s}^2 \))

Q13. A capillary tube of radius \( 0.65 \, \text{mm} \) is dipped in water (\( S = 0.0727 \, \text{N/m} \), \( \rho = 1000 \, \text{kg/m}^3 \), \( \cos \theta = 1 \)). What is the capillary rise? (Take \( g = 9.8 \, \text{m/s}^2 \))

Q14. What is the main reason a plane’s wings generate lift during flight?

Q15. A sphere of radius \( 0.045 \, \text{m} \) moves at \( 0.15 \, \text{m/s} \) through machine oil (\( \eta = 0.034 \, \text{Pa s} \)). What is the viscous drag force?

NEET Physics — Mechanical Properties of Fluids

Free MCQ Test 7 of 22

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What is the key assumption behind the equation of continuity for fluid flow?

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Physics preparation, focusing specifically on the chapter Mechanical Properties of Fluids. It contains 15 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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Key concepts covered in this specific test include Assumption, Equation, Continuity, Cylindrical, Pressure, and Atmospheric.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1. What is the key assumption behind the equation of continuity for fluid flow?

  • A. Fluid is viscous
  • B. Flow is turbulent
  • C. Fluid is incompressible
  • D. Pressure is constant

Q2. A cylindrical vessel is filled with water (\( \rho = 1000 \, \text{kg/m}^3 \)) to a height of \( 2 \, \text{m} \). What is the pressure at the bottom of the vessel if the atmospheric pressure is \( 1.01 \times 10^5 \, \text{Pa} \)? (Take \( g = 10 \, \text{m/s}^2 \))

  • A. 1.11 × 10⁵ Pa
  • B. 1.21 × 10⁵ Pa
  • C. 1.31 × 10⁵ Pa
  • D. 1.41 × 10⁵ Pa

Q3. A tank has a hole \( 0.7 \, \text{m} \) below the water surface, open to the atmosphere. What is the efflux speed? (Take \( g = 9.8 \, \text{m/s}^2 \))

  • A. 3.0 m/s
  • B. 3.7 m/s
  • C. 4.2 m/s
  • D. 4.8 m/s

Q4. A hydraulic lift has a small piston of area \( 0.01 \, \text{m}^2 \) and a large piston of area \( 0.09 \, \text{m}^2 \). If a force of \( 100 \, \text{N} \) is applied on the small piston, what is the force exerted by the large piston?

  • A. 600 N
  • B. 900 N
  • C. 1200 N
  • D. 1500 N

Q5. What is the primary condition for streamline flow to occur in a fluid?

  • A. High velocity
  • B. Low velocity
  • C. High density
  • D. Low pressure

+ 10 more questions in the actual test

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