SANDHYA GROUP Mechanical Maintenance Engineer Interview Questions and Answers

Q1. About plc program and scada system
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Q2. About the analog system
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Q3. Furnace process
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Q4. How VFD variable frequency drive works ?
Ans. 
A VFD controls the speed and torque of an electric motor by varying the frequency and voltage of the power supplied to the motor.
• VFD converts fixed frequency AC power to variable frequency and voltage to control motor speed.

• It adjusts the frequency of the electrical input to the motor to change its speed.

• VFDs are commonly used in HVAC systems, pumps, conveyors, and other industrial applications.

• They improve energy effi...read more
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I am setting in office for aptitude test

Q1. Tell about your self
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I am a dedicated Mechanical Engineer with a strong background in designing and implementing mechanical systems.
• Graduated with a degree in Mechanical Engineering from XYZ University

• Proficient in CAD software such as SolidWorks and AutoCAD

• Experienced in conducting stress analysis and simulations for mechanical components

• Worked on projects involving HVAC systems design and optimization
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Q2. What is your goals
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My goal is to continuously improve my technical skills, contribute to innovative projects, and eventually become a lead engineer in the field.
• Continuously improve technical skills through ongoing education and training

• Contribute to innovative projects by proposing and implementing new ideas

• Work towards becoming a lead engineer by taking on more responsibilities and leadership roles
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Q1. SAP PM , diffrent types of egitor, vacuum pump, bucket elevator etc
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Equipment handled in past

Q1. Working principal of Plate heat exchanger
Ans. 
Plate heat exchanger works on the principle of transferring heat between two fluids through metal plates.
• Consists of multiple plates with small gaps in between for fluid flow

• Hot and cold fluids flow on opposite sides of the plates

• Heat is transferred through the plates from hot fluid to cold fluid

• Efficient in transferring heat due to large surface area of plates

• Commonly used in HVAC systems, refrigeration, and industria
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Q2. NPSH of Pump and its importance while pump selection
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NPSH of Pump is Net Positive Suction Head, crucial for preventing cavitation in pumps during operation.
• NPSH is the measure of a pump's ability to prevent cavitation by maintaining a sufficient pressure at the suction inlet.

• It is important to consider NPSH when selecting a pump to ensure it can operate effectively without cavitation.

• Factors affecting NPSH include pump design, fluid properties, and operating conditions.

• N...read more
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Q1. Tell me your past experience
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Q1. What you know about boiler
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A boiler is a closed vessel used to generate steam or hot water for heating or power generation.
• Boilers can be fueled by various sources such as natural gas, oil, coal, or biomass.

• Boilers can be classified into different types such as fire-tube, water-tube, and electric boilers.

• Boilers require regular maintenance to ensure efficient and safe operation.

• Boilers are commonly used in industries such as power generation, ch...read more
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Q2. What you know about company
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