Chemical Engineering - MCQ Practice Questions

For incompressible flow through a converging nozzle, if the inlet area is 4 times the outlet area and inlet velocity is 5 m/s, the outlet velocity will be:

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:

A centrifugal pump delivers 30 m³/h of water. The inlet pressure is -0.2 bar (gauge) and outlet pressure is 8 bar (gauge). If the outlet is 2m higher than inlet, calculate the total head in meters. (Consider g = 9.81 m/s², ρ = 1000 kg/m³)

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

For a sharp-edged orifice, the coefficient of contraction (Cc) typically ranges between:

In the Hagen-Poiseuille equation for laminar flow through a circular pipe, the volumetric flow rate is proportional to:

A ball of diameter 5 cm falls through glycerin at terminal velocity. If the Stokes drag coefficient Cd is used, this indicates:

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

The Darcy-Weisbach equation relates friction loss to flow parameters. The friction factor f for turbulent flow in smooth pipes is given by:

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?

For compressible flow through a converging-diverging nozzle (de Laval nozzle), the throat conditions occur where:

A pipeline carries water at 20°C. When the flow velocity increases from 1 m/s to 3 m/s in a straight horizontal pipe of constant diameter, the friction factor:

Which of the following best describes the boundary layer separation phenomenon?

For flow over a flat plate, the drag force depends on velocity according to:

In a siphon arrangement, what is the maximum theoretical height from which water can be siphoned up using atmospheric pressure?

For a venturimeter operating with water flow, the pressure at the throat is found to be lower than upstream. This pressure drop is used to:

The relative roughness of a pipe is defined as:

In a pitot tube application, the stagnation point pressure exceeds static pressure by an amount equal to:

For a long horizontal pipeline with incompressible fluid, the pressure loss due to friction increases when: