10+ BHEL Interview Questions and Answers for Freshers

Turbine blades are coated with thermal barrier coatings (TBCs) to protect them from high temperatures and corrosion.

• TBCs are made of ceramic materials such as zirconia and alumina

• TBCs help to reduce the heat transfer from the hot gas to the blade

• TBCs also protect the blade from oxidation and corrosion

• Other coatings such as thermal spray coatings and diffusion coatings are also used for turbine blades

• Thermal spray coatings are made of metals such as nickel and cobalt

• Diffusion ...read more

Stainless steel is corrosion-resistant due to the presence of chromium.

• Chromium forms a thin layer of oxide on the surface of the steel, which prevents further corrosion.

• The amount of chromium in stainless steel determines its level of corrosion resistance.

• Other elements like nickel and molybdenum can also contribute to corrosion resistance.

• Stainless steel is commonly used in applications where corrosion resistance is important, such as in the food and medical industries.

Synchronous motor runs at a constant speed while hysteresis motor has a rotor that follows the rotating magnetic field.

• Synchronous motor is used in applications where constant speed is required, such as in clocks and timers.

• Hysteresis motor is used in applications where precise control of speed is required, such as in record players and tape recorders.

• Synchronous motor has a stator and rotor that rotate at the same speed, while hysteresis motor has a rotor that lags behind th...read more

BHEL manufactures power generation equipment, transmission systems, transportation equipment, and industrial products.

• BHEL manufactures power generation equipment such as boilers, turbines, and generators.

• They also manufacture transmission systems like transformers and switchgears.

• BHEL produces transportation equipment such as locomotives and electric vehicles.

• They manufacture industrial products like valves, heat exchangers, and pumps.

• BHEL has also diversified into renewable...read more

BHEL is a reputable company with a strong track record in the industry.

• BHEL has a long history of delivering high-quality products and services.

• The company has a strong market presence and is well-known for its engineering expertise.

• BHEL has received positive feedback from my friends who have worked or interacted with the company.

• The company's financial performance and growth prospects are promising.

Various metals are used at work sites depending on the application and industry.

• Common metals used include steel, aluminum, copper, and brass.

• Steel is often used in construction and manufacturing for its strength and durability.

• Aluminum is lightweight and corrosion-resistant, making it ideal for aerospace and automotive industries.

• Copper is a good conductor of electricity and is used in electrical wiring and plumbing.

• Brass is a combination of copper and zinc and is often used...read more

PLC is a hardware device that controls industrial processes, while SCADA is a software system that monitors and controls those processes.

• PLC is a programmable logic controller that controls the input/output of industrial processes.

• SCADA is a supervisory control and data acquisition system that collects and analyzes data from the industrial processes.

• PLC is a hardware device, while SCADA is a software system.

• PLC is used for controlling the process, while SCADA is used for moni...read more

Relays are used for low power applications while contactors are used for high power applications.

• Relays are typically used in control circuits to switch low power loads such as lights and fans.

• Contactors are used to switch high power loads such as motors and compressors.

• Relays have a lower current rating than contactors.

• Contactors have larger contacts and can handle higher currents than relays.

• Relays are typically smaller in size than contactors.

• Contactors are typically more ...read more

Switch is an electronic component used to connect or disconnect a circuit while a timer is a device used to measure time intervals.

• Switch is used to turn on/off a device while timer is used to control the duration of a device's operation.

• Switch is a binary device with two states (on/off) while timer can be analog or digital and can measure time in seconds, minutes, or hours.

• Examples of switches include light switches, power switches, and toggle switches while examples of time...read more

Switches are used to control the flow of current in a circuit, while relays are used to switch a circuit on or off.

• Switches are manually operated, while relays are electrically operated.

• Switches are used in low voltage applications, while relays are used in high voltage applications.

• Switches are simple in construction, while relays are more complex.

• Examples of switches include light switches and toggle switches, while examples of relays include electromagnetic relays and soli...read more

Suggestion planning involves creating and implementing ideas for improvement within an organization.

• Involves brainstorming ideas for improvement

• Creating actionable plans based on suggestions

• Implementing changes to improve processes or outcomes

• Encouraging employee participation in suggesting ideas

• Regularly reviewing and evaluating the effectiveness of implemented suggestions

HR analytics is the process of collecting and analyzing HR data to improve decision-making and strategic planning within an organization.

• HR analytics involves using data to identify trends, patterns, and insights related to workforce performance, recruitment, retention, and employee engagement.

• It helps HR professionals make data-driven decisions to improve employee satisfaction, productivity, and overall organizational performance.

• Examples of HR analytics include tracking emp...read more