NMDC Limited Maintenance Engineer Interview Questions and Answers

Q1. Explain for pump
Ans. 
A pump is a mechanical device used to move fluids from one place to another.
• Pumps are commonly used in various industries such as oil and gas, water treatment, and manufacturing.

• They can be classified into different types based on their principle of operation, such as centrifugal pumps and positive displacement pumps.

• Pumps can be powered by electricity, engines, or even manual operation.

• They are essential for maintaini...read more
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Q2. Explain for types of valves
Ans. 
There are four types of valves: gate valves, globe valves, ball valves, and butterfly valves.
• Gate valves are used to control the flow of fluid by raising or lowering a gate.

• Globe valves have a disc that moves up and down to control the flow of fluid.

• Ball valves use a rotating ball with a hole in it to control the flow of fluid.

• Butterfly valves have a disc that rotates to control the flow of fluid.
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Q3. Explain for screw pump
Ans. 
A screw pump is a type of positive displacement pump that uses rotating screws to move fluid.
• Screw pumps are commonly used in various industries, including oil and gas, wastewater treatment, and food processing.

• They consist of two or more intermeshing screws that rotate in opposite directions, creating a vacuum and pushing the fluid through the pump.

• Screw pumps are known for their high efficiency, low noise levels, and...read more
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Q4. Gear box working
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Q5. How to work Fire engine with high pressure
Ans. 
Working with a fire engine under high pressure requires proper training and knowledge of the equipment.
• Ensure proper training on operating the fire engine with high pressure

• Understand the different components and controls of the fire engine

• Follow safety protocols and guidelines

• Maintain and inspect the fire engine regularly

• Practice efficient water management to maximize effectiveness

• Be aware of potential hazards and tak...read more
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Q6. PPE ALL QUESTIONS
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Q7. Safety questions
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Q8. Industrial safety
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Q9. What is PPE& full fome
Ans. 
PPE stands for Personal Protective Equipment. Full form refers to the complete expansion of an acronym or abbreviation.
• PPE is equipment worn to minimize exposure to hazards that can cause injuries or illnesses.

• Examples of PPE include safety helmets, gloves, goggles, masks, and protective clothing.

• Full form refers to the complete expansion of an acronym or abbreviation, such as PPE (Personal Protective Equipment).
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Q1. Explain for pump
Ans. 
A pump is a mechanical device that moves fluids or gases by applying mechanical force.
• Pumps are used in various industries such as water treatment, oil and gas, and manufacturing.

• There are different types of pumps including centrifugal pumps, positive displacement pumps, and diaphragm pumps.

• Pumps work by creating a pressure difference to move the fluid from one place to another.

• Regular maintenance of pumps is essential...read more
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Q2. Explain for types of valves
Ans. 
There are four main types of valves: ball valves, gate valves, globe valves, and butterfly valves.
• Ball valves: used for on/off control without pressure drop, commonly used in gas and liquid applications

• Gate valves: used for on/off control with low pressure drop, commonly used in water and sewage systems

• Globe valves: used for regulating flow, commonly used in high-pressure steam systems

• Butterfly valves: used for on/off ...read more
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Q3. Explain for screw pump
Ans. 
A screw pump is a type of positive displacement pump that uses rotating screws to move fluid along the screw's axis.
• Screw pumps are known for their high efficiency and ability to handle high viscosity fluids.

• They are commonly used in industrial applications such as oil and gas, wastewater treatment, and food processing.

• Screw pumps can be classified into different types based on the number of screws, such as single scre
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Q4. Gear box working
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Q5. How to work Fire engine with high pressure
Ans. 
To work a fire engine with high pressure, ensure proper training, follow safety protocols, adjust pressure settings, and use appropriate nozzles.
• Ensure proper training on how to operate the fire engine with high pressure

• Follow safety protocols to prevent accidents and injuries

• Adjust pressure settings according to the specific situation and requirements

• Use appropriate nozzles to control the flow and direction of water

• Re...read more
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Q6. PPE ALL QUESTIONS
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Q7. Safety questions
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Q8. Industrial safety
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Q9. What is PPE& full fome
Ans. 
PPE stands for Personal Protective Equipment. It includes items like helmets, gloves, goggles, and full fome refers to the full form of PPE.
• PPE stands for Personal Protective Equipment

• It includes items like helmets, gloves, goggles, etc.

• Full fome refers to the full form of PPE, which is Personal Protective Equipment
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At first I have to pass a written test

Q1. Then I have to clear oral questions related to my stream
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Q2. He asked me about working process
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Q1. Aske me about my past experience and job category
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Q1. Tpm & psm realted questions
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Q1. Tpm & psm related
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