Chemical Engineering - MCQ Practice Questions

Which of the following dimensionless numbers represents the ratio of inertial forces to viscous forces in fluid flow?

In a horizontal pipe flow, the pressure drop increases with which of the following factors?

A centrifugal pump has an impeller diameter of 0.3 m rotating at 1500 RPM. Calculate the peripheral speed of the impeller tip.

The net positive suction head (NPSH) available is 4.5 m and NPSH required is 3.2 m for a pump. What can be concluded?

Which pump characteristic curve represents the relationship between head and flow rate?

In compressible flow through a nozzle, sonic or critical conditions occur when Mach number equals:

In a fluid flow system, which of the following best represents the Bernoulli equation?

The Reynolds number for a fluid flow is defined as the ratio of inertial forces to viscous forces. For a pipe flow with diameter 0.05 m, velocity 2 m/s, and kinematic viscosity 1.0×10⁻⁶ m²/s, calculate the Reynolds number.

Which of the following statements about laminar flow in a circular pipe is correct?

A fluid flows through a horizontal pipe of diameter 0.1 m at a velocity of 3 m/s. If the pipe suddenly contracts to 0.05 m diameter, what is the velocity in the contracted section (assuming incompressible flow)?

The friction factor 'f' in the Darcy-Weisbach equation depends on Reynolds number and relative roughness. For laminar flow (Re < 2300), friction factor is given by:

A manometer shows a pressure difference of 50 mm of mercury (ρ_Hg = 13,600 kg/m³). What is the equivalent pressure difference in Pa?

For a fluid flowing over a submerged object, the drag force is given by F_D = ($\frac{1}{2}$)ρV²AC_D. If velocity doubles and drag coefficient remains constant, drag force increases by a factor of: