Ingersoll Rand Mechanical Engg. Design Interview Questions and Answers

Boiler efficiency can be calculated by measuring the heat input and heat output of the boiler.

• Calculate the heat input by measuring the fuel flow rate, fuel calorific value, and fuel consumption.

• Calculate the heat output by measuring the steam flow rate and steam enthalpy.

• Direct efficiency = (Heat output / Heat input) * 100%

• Indirect efficiency = Direct efficiency * Boiler efficiency of other components (like economizer

The monthly maintenance cost of my section is approximately $10,000.

• The monthly maintenance cost includes expenses for spare parts, labor, equipment rental, and utilities.

• Regular maintenance tasks such as lubrication, inspections, and repairs contribute to the overall cost.

• Cost may vary depending on the size of the section, age of equipment, and frequency of maintenance activities.

Torque is the product of force and distance from the axis of rotation.

• Torque = Force x Distance

• The SI unit of torque is Newton-meter (Nm)

• Torque is a measure of the rotational force applied to an object

TIG welding uses a tungsten electrode to create a weld. The current used depends on the material being welded.

• TIG stands for Tungsten Inert Gas welding

• The current used in TIG welding can vary depending on the material thickness and type

• For thin materials, lower currents are typically used, while thicker materials require higher currents

• The current can range from 5 to 400 amps in TIG welding

Active Directory is a Microsoft service that manages network resources and user accounts.

• Active Directory is used to authenticate and authorize users and computers in a network.

• It allows administrators to manage and control access to network resources.

• Active Directory stores information about users, groups, computers, and other network objects.

• It provides a hierarchical structure for organizing network resources.

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The default protocol used in directory services is LDAP.

• LDAP stands for Lightweight Directory Access Protocol.

• It is used to access and manage directory information.

• LDAP is commonly used in enterprise environments for authentication and authorization.

• Examples of directory services that use LDAP include Microsoft Active Directory and OpenLDAP.