Mechanical Properties of Fluids

Q1.Bernoulli's principle states that for a streamline flow, the sum of pressure, kinetic energy per unit volume, and potential energy per unit volume is:

• AZero
• BConstant
• CProportional to velocity
• DProportional to height

Q2.The SI unit of pressure is:

• ANewton
• BPascal
• CJoule
• DWatt

Q3.The excess pressure inside a soap bubble of radius R and surface tension T is:

• A2T/R
• B4T/R
• CT/R
• D6T/R

Q4.A Venturi meter has pipe cross-sections A₁ = 10⁻² m² and A₂ = 10⁻³ m². The pressure difference is 10⁴ Pa. The volume flow rate (ρ = 1000 kg/m³) is:

• AAbout 1.4×10⁻³ m³/s
• BAbout 1.4×10⁻² m³/s
• CAbout 1.4×10⁻¹ m³/s
• DAbout 1.4 m³/s

Q5.A hydraulic lift has pistons of areas 10 cm² and 1000 cm². A force of 100 N applied on the smaller piston lifts a load on the larger piston of:

• A1 N
• B100 N
• C10000 N
• D1000 N