NEET Physics: Mechanical Properties of Fluids — MCQ Test 10

Q6. A \( 40 \, \text{kg} \) wooden plank is placed on a performer’s chest. If each femur has an area of \( 12 \, \text{cm}^2 \), what is the pressure on the femurs? (Take \( g = 10 \, \text{m/s}^2 \))

Q7. What is the primary reason a heavy object falls faster than a lighter one through a viscous fluid?

Q8. A sphere of radius \( 0.03 \, \text{m} \) falls through machine oil (\( \eta = 0.113 \, \text{Pa s} \)) at \( 0.15 \, \text{m/s} \). What is the viscous drag force?

Q9. According to Pascal’s law, what happens to the pressure in a fluid when an external force is applied?

Q10. Why does a bubble collapse when the external pressure exceeds its internal pressure?

Q11. An aircraft (\( m = 2.2 \times 10^5 \, \text{kg} \), wing area \( 440 \, \text{m}^2 \)) flies level. What is the pressure difference across the wings? (Take \( g = 10 \, \text{m/s}^2 \))

Q12. A spray pump tube (\( 10 \, \text{cm}^2 \)) has 50 holes, each of diameter \( 0.8 \, \text{mm} \). If the flow speed inside is \( 1.2 \, \text{m/min} \), what is the ejection speed?

Q13. A hydraulic lift raises a \( 2300 \, \text{kg} \) load using a small piston of radius \( 5.0 \, \text{cm} \) and a large piston of radius \( 20 \, \text{cm} \). What force is applied on the small piston? (Take \( g = 9.8 \, \text{m/s}^2 \))

Q14. A soap bubble of radius \( 11 \, \text{mm} \) has a surface tension of \( 0.027 \, \text{N/m} \). What is the excess pressure inside?

Q15. What does the equation of continuity imply about fluid flow in a pipe of varying cross-section?

NEET Physics — Mechanical Properties of Fluids

Free MCQ Test 10 of 22

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Medium

A pipe’s cross-sectional area changes from \( 0.08 \, \text{m}^2 \) to \( 0.02 \, \text{m}^2 \). If the speed at the larger end is \( 1.2 \, \text{m/s} \), what is the speed at the smaller end?

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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 Sectional, Manometer, Difference, Pressure, Capillary, and Absolute.

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. A pipe’s cross-sectional area changes from \( 0.08 \, \text{m}^2 \) to \( 0.02 \, \text{m}^2 \). If the speed at the larger end is \( 1.2 \, \text{m/s} \), what is the speed at the smaller end?

  • A. 3.6 m/s
  • B. 4.0 m/s
  • C. 4.8 m/s
  • D. 5.2 m/s

Q2. A manometer with ethyl alcohol (\( \rho = 806 \, \text{kg/m}^3 \)) shows a height difference of \( 0.26 \, \text{m} \). What is the pressure difference? (Take \( g = 9.8 \, \text{m/s}^2 \))

  • A. 1800 Pa
  • B. 2000 Pa
  • C. 2055 Pa
  • D. 2200 Pa

Q3. A capillary tube of radius \( 0.3 \, \text{mm} \) 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 \( g = 10 \, \text{m/s}^2 \))

  • A. 3.5 cm
  • B. 4.8 cm
  • C. 5.5 cm
  • D. 6.0 cm

Q4. Water flows at \( 3.5 \, \text{m/s} \) at \( 4.5 \, \text{m} \) height with pressure \( 1.5 \times 10^5 \, \text{Pa} \). What is the pressure at \( 2.5 \, \text{m} \) height with speed \( 4.5 \, \text{m/s} \)? (\( \rho = 1000 \, \text{kg/m}^3 \), \( g = 9.8 \, \text{m/s}^2 \))

  • A. 1.62 × 10⁵ Pa
  • B. 1.65 × 10⁵ Pa
  • C. 1.66 × 10⁵ Pa
  • D. 1.68 × 10⁵ Pa

Q5. What is the absolute pressure at \( 300 \, \text{m} \) depth in seawater (\( \rho = 1.03 \times 10^3 \, \text{kg/m}^3 \)) with \( P_a = 1.01 \times 10^5 \, \text{Pa} \)? (Take \( g = 10 \, \text{m/s}^2 \))

  • A. 3.0 × 10⁶ Pa
  • B. 3.19 × 10⁶ Pa
  • C. 3.3 × 10⁶ Pa
  • D. 3.5 × 10⁶ Pa

+ 10 more questions in the actual test

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