Chemical Engineering - MCQ Practice Questions

Which of the following is the SI unit of kinematic viscosity?

A fluid flows through a pipe of diameter 0.1 m with velocity 2 m/s. If the kinematic viscosity is 1×10⁻⁶ m²/s, calculate the Reynolds number.

Which equation relates pressure drop to velocity in laminar flow through pipes?

A centrifugal pump operates at 1500 RPM. If the impeller diameter is 0.3 m, what is the tip speed?

In the Bernoulli equation, which term represents the pressure energy per unit volume?

A fluid with dynamic viscosity 0.5 Pa·s and density 800 kg/m³ flows in a pipe. Its kinematic viscosity is:

For a Newtonian fluid, shear stress (τ) is related to shear rate (dV/dy) by:

In fluid mechanics, which dimensionless number represents the ratio of inertial forces to viscous forces?

Which pumping principle is used in a gear pump?

A fluid with dynamic viscosity of 0.8 Pa·s and density of 900 kg/m³ flows through a circular pipe. What is the kinematic viscosity of this fluid?

For laminar flow of a viscous fluid between two parallel plates, the velocity profile is:

Which dimensionless number is used to characterize the ratio of inertial forces to viscous forces in fluid flow?

Which of the following pump types operates on the principle of positive displacement with rotating screws?

In a U-tube manometer measuring differential pressure, if one side contains mercury (ρ = 13600 kg/m³) with a height difference of 250 mm, what is the differential pressure?

The relative roughness of a pipe is defined as:

A centrifugal pump operates with water (ρ = 1000 kg/m³) at an impeller diameter of 0.3 m and rotational speed of 1500 RPM. Calculate the peripheral velocity at the impeller tip.

In laminar flow through a circular pipe, the velocity profile is parabolic. What is the ratio of average velocity to maximum velocity at the centerline?

Which dimensionless number characterizes the relative importance of inertial forces to viscous forces in fluid flow?

In a reciprocating pump with piston diameter D = 0.1 m and stroke length L = 0.2 m operating at 60 RPM, calculate the theoretical displacement per revolution.

A fluid flows through a circular pipe of diameter 50 mm at a velocity of 2 m/s. If the kinematic viscosity is 1×10⁻⁵ m²/s, calculate the Reynolds number and identify the flow regime.