Deccan Fine Chemicals Interview Questions and Answers for Freshers

Distillation column design principles involve understanding the separation process, heat transfer, and fluid dynamics.

• Understanding the separation process is crucial for designing an efficient distillation column.

• Consider the heat transfer requirements to ensure proper temperature control within the column.

• Fluid dynamics play a key role in determining the flow patterns and efficiency of the distillation process.

Critical speed of ball mill is the speed at which the centrifugal forces equal gravitational forces at the mill shell's inside surface.

• Critical speed is calculated by the formula: Nc = 1/(2*pi*sqrt(D/g)) where Nc is the critical speed, D is the diameter of the mill in meters, and g is the acceleration due to gravity (9.81 m/s^2).

• At critical speed, the grinding media in the mill starts rotating with the mill shell and no longer falls back, but stays on the perimeter of the mil...read more

Strength of materials, thermal, hydraulics, and projects

• Strength of materials refers to the study of how materials behave under different forces and loads

• Types of materials commonly studied include metals, ceramics, polymers, and composites

• Thermal engineering deals with the transfer of heat and the design of systems to control temperature

• Hydraulics involves the study of fluid behavior and the use of pumps to move and control fluids

• Projects in this context may refer to practic...read more

Relays are electrically operated switches that control high power circuits with low power signals. Types include electromechanical, solid state, and reed relays.

• Relays work by using an electromagnet to mechanically switch contacts open or closed.

• Types of relays include electromechanical relays, solid state relays, and reed relays.

• Electromechanical relays use an electromagnet to operate mechanical contacts.

• Solid state relays use semiconductor devices to switch the circuit on a...read more

A single line diagram is a simplified diagram that shows the electrical connections and components of a power system in a single line.

• It is used to represent the electrical system in a simplified manner.

• It shows the connections between various components like generators, transformers, circuit breakers, etc.

• It helps in understanding the overall layout of the system and how different components are interconnected.

• It is commonly used in power distribution systems and industrial ...read more

Induction motor works on the principle of electromagnetic induction to produce rotational motion.

• A rotating magnetic field is produced by the stator winding

• This magnetic field induces current in the rotor winding

• The interaction between the magnetic field and the induced current produces torque, which causes the rotor to rotate

• The speed of the rotor is slightly less than the speed of the rotating magnetic field

• Induction motors are widely used in various applications such as fa...read more