Fluid Mechanics Quiz

Which of the following is not a unit of pressure?

• Pascal

• atm

• bar

• Nm

Which of the following statements is true about the viscosity of gases?

• Viscosity decreases with an increase in temperature

• Viscosity increases with an increase in temperature

• Viscosity remains constant with an increase in temperature

• Viscosity first decreases then increases with an increase in temperature

Pascal’s Law states that:

• Fluids cannot be compressed

• The volume of a fluid decreases with an increase in pressure

• The velocity of a fluid increases with an increase in pressure

• Pressure applied to a confined fluid is transmitted undiminished in all directions

What is the bulk modulus of a hydraulic fluid?

• The ratio of compressive stress to volumetric strain

• The ratio of tensile stress to linear strain

• The ratio of shear stress to shear strain

• The ratio of volumetric strain to compressive stress

What is the correct relation between compressibility (β) and bulk modulus (K)?

• β = K

• β = 1/K

• β = 2K

• β = K/2

What is the correct relation between compressibility (β) and bulk modulus (K)?

• β = K

• β = 1/K

• β = 2K

• β = K/2

A high bulk modulus in hydraulic fluids indicates:

• High compressibility

• Low compressibility

• High viscosity

• Low viscosity

According to Pascal’s Law, an increase in pressure at any point in an enclosed fluid is transmitted:

• In the opposite direction

• In the perpendicular direction

• In the same direction

• In all directions

Which of the following is an application of Pascal’s Law in everyday life?

• Water bottle manufacturing

• Cooking food in a pressure cooker

• Charging a smartphone battery

• Lighting a matchstick

In a hydraulic lift system, if a small force is applied to the smaller piston, what happens to the force exerted by the larger piston?

• It decreases

• It increases

• It remains the same

• It becomes zero