Quiz for Fluid Mechanics

Q1: What is the SI unit of pressure?

A. N/m² B. kg/m³ C. Pascal D. atm

Q2: The instrument used to measure fluid pressure is called?

A. Barometer B. Hygrometer C. Manometer D. Thermometer

Q3: According to Pascal's law, pressure at a point in a fluid is:

A. Unequal in all directions B. Equal in all directions C. Depends on direction D. Zero

Q4: Bernoulli’s theorem is based on the principle of:

A. Conservation of mass B. Conservation of energy C. Conservation of momentum D. Conservation of temperature

Q5: Viscosity is a measure of:

A. Density of fluid B. Flow rate C. Internal friction D. Surface tension

Q6: Streamline flow is also known as:

A. Turbulent flow B. Irregular flow C. Laminar flow D. Random flow

Q7: Which equation is used to determine buoyant force?

A. Pascal's Law B. Archimedes' Principle C. Bernoulli's Equation D. Newton's Law

Q8: The dimension of viscosity is:

A. ML⁻¹T⁻¹ B. MLT⁻² C. ML²T⁻² D. ML⁻²T⁻¹

Q9: Unit of coefficient of viscosity is:

A. kg/m² B. Pa·s C. m²/s D. N·m

Q10: Reynolds number is a ratio of:

A. Viscous force to pressure force B. Inertial force to viscous force C. Buoyant force to weight D. Velocity to density

Q11: The terminal velocity of a sphere in a viscous fluid depends on:

A. Its radius B. Viscosity of fluid C. Density difference D. All of these

Q12: Surface tension is measured in:

A. N/m B. Pa C. J/kg D. kg/m³

Q13: Capillary rise is directly proportional to:

A. Tube radius B. Tube length C. Tube diameter D. Inverse of tube radius

Q14: In Bernoulli's equation, which force is neglected?

A. Viscous force B. Gravitational force C. Pressure force D. Centripetal force

Q15: Which of the following flows has Reynolds number less than 2000?

A. Turbulent B. Chaotic C. Laminar D. Unsteady

Q16: A floating body is in stable equilibrium if:

A. CG is above CB B. CG and CB coincide C. CB is above CG D. CB is at origin

Q17: The angle of contact in water and glass is:

A. Greater than 90° B. 90° C. Zero D. Less than 90°

Q18: Stoke's law is valid for:

A. Turbulent flow B. Non-viscous flow C. Low Reynolds number D. Compressible flow

Q19: The pressure difference across a curved liquid surface is given by:

A. Young’s modulus B. Stoke’s law C. Laplace’s law D. Archimedes’ law

Q20: Hydraulic lift works on the principle of:

A. Newton's law B. Pascal's law C. Archimedes' law D. Bernoulli's law