PNC Infratech Project Engineer Mechanical Interview Questions and Answers

Specification of machinery refers to the detailed requirements and characteristics of a machine or equipment.

• Includes dimensions, materials, performance criteria, and safety features

• Should be clearly defined to ensure proper design and functionality

• Examples: maximum load capacity, operating temperature range, power consumption

A lathe is a machine tool that rotates a workpiece about an axis of rotation to perform various operations such as cutting, sanding, drilling, knurling, or deformation.

• Lathe is used to shape and cut materials such as wood, metal, and plastic.

• It rotates the workpiece on its axis and a cutting tool is applied to the workpiece to remove material.

• Lathe can perform various operations such as turning, facing, drilling, borin...read more

Boiler drum is a cylindrical container which is used to store water and steam produced in a boiler.

• It is a vital component of a boiler system.

• It is usually made of steel and is located at the top of the boiler.

• It acts as a reservoir of water/steam and helps to separate steam from water.

• It also helps to regulate the pressure and temperature of the steam.

• The level of water in the drum is maintained by a feedwater control...read more

Pascal's law states that pressure applied to a fluid is transmitted equally in all directions. Entropy is a measure of disorder or randomness in a system.

• Pascal's law is important in hydraulic systems, where pressure is used to transmit force.

• Entropy is a thermodynamic property that increases with the degree of disorder in a system.

• Entropy can be used to predict the direction of chemical reactions and the efficiency of

Pressure classes are categories used to classify the pressure rating of piping components.

• Pressure classes are used to indicate the maximum allowable working pressure for piping components.

• Common pressure classes include 150, 300, 600, 900, 1500, and 2500.

• Each pressure class corresponds to a specific pressure rating in pounds per square inch (psi).

• Pressure classes are important for selecting the right components for a