B5 Plus Mechanical Maintenance Engineer Interview Questions and Answers

Q1. What are type of crane used
Ans. 
Various types of cranes are used in mechanical maintenance, including overhead cranes, gantry cranes, jib cranes, and mobile cranes.
• Overhead cranes are commonly used in industrial settings for lifting and moving heavy loads.

• Gantry cranes are used in shipyards and construction sites for lifting and moving large objects.

• Jib cranes are often used in workshops and warehouses for precise lifting and positioning of materials...read more
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Q2. What are type of loading on bearing
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Types of loading on bearings include radial load, axial load, and moment load.
• Radial load: Load acting perpendicular to the axis of rotation.

• Axial load: Load acting parallel to the axis of rotation.

• Moment load: Load causing bending or twisting of the bearing.

• Combination loading: Bearings may experience a combination of radial, axial, and moment loads.

• Examples: Radial load on a wheel bearing, axial load on a thrust bear
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Q3. What type of heat treatment to be done on tube mill shaft
Ans. 
The tube mill shaft should undergo heat treatment to improve its strength and durability.
• The most common heat treatment for tube mill shafts is quenching and tempering.

• Quenching involves heating the shaft to a high temperature and then rapidly cooling it in water or oil to increase its hardness.

• Tempering is done after quenching to reduce the brittleness caused by the rapid cooling process.

• Other heat treatment methods l...read more
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Q4. What do you understand by Pickling process
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Pickling process is a metal surface treatment method to remove impurities and improve corrosion resistance.
• Pickling is a chemical process used to remove impurities like stains, rust, and scale from metal surfaces.

• It involves immersing the metal in an acidic solution, such as hydrochloric acid or sulfuric acid.

• The process helps to improve the metal's corrosion resistance and prepare it for further treatments like painti...read more
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Q5. What happen in cold rolling mill process to structure of steel
Ans. 
In cold rolling mill process, the structure of steel is altered through compression and deformation.
• Cold rolling reduces the thickness of steel by compressing it between rollers

• This process increases the strength and hardness of the steel

• Grain structure of the steel becomes elongated and aligned in the direction of rolling

• Cold rolling can also improve the surface finish and dimensional accuracy of the steel

• Examples: Co...read more
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Q6. How Centrifugal pump work
Ans. 
Centrifugal pumps work by converting mechanical energy from a motor into kinetic energy to move fluid through the pump.
• Centrifugal force is created by the rotation of the pump impeller, which pushes the fluid towards the outer edges of the pump casing.

• The kinetic energy of the fluid increases as it moves through the pump, creating pressure that forces the fluid out of the pump discharge.

• Centrifugal pumps are commonly u...read more
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Q7. Tube mill roll materail and their root dia
Ans. 
Tube mill rolls are typically made of high-quality alloy steel or tool steel, with varying root diameters depending on the specific application.
• Tube mill rolls are commonly made of materials such as high-quality alloy steel or tool steel for durability and wear resistance.

• The root diameter of tube mill rolls can vary depending on the specific requirements of the milling process.

• Examples of tube mill roll materials incl...read more
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Q8. Gear box ratio and output power
Ans. 
Gear box ratio determines the relationship between input and output speeds, while output power is the amount of work done per unit of time.
• Gear box ratio is the ratio of the number of teeth on the input gear to the number of teeth on the output gear.

• Output power is the product of the force applied and the distance over which the force is applied per unit of time.

• For example, if a gear box has a ratio of 2:1 and the inp...read more
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Q1. What is safety, What is Hazards.
Ans. 
Safety refers to measures taken to prevent accidents and injuries, while hazards are potential sources of harm or danger.
• Safety involves implementing protocols and procedures to minimize risks in the workplace

• Hazards are factors or situations that have the potential to cause harm

• Examples of hazards include electrical hazards, chemical hazards, and ergonomic hazards

• Safety measures may include training employees on prope...read more
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Q2. What is predictive maintenance.
Ans. 
Predictive maintenance is a proactive maintenance strategy that uses data analysis to predict when equipment failure is likely to occur.
• Uses data analysis to predict when equipment failure is likely to occur

• Helps in scheduling maintenance activities before a breakdown occurs

• Reduces downtime and increases equipment reliability

• Examples include vibration analysis, oil analysis, and thermography
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Q1. Types of bearing.
Ans. 
Types of bearings include ball bearings, roller bearings, plain bearings, and fluid bearings.
• Ball bearings use balls to reduce friction between two surfaces.

• Roller bearings use cylindrical rollers to reduce friction.

• Plain bearings have a sliding surface instead of balls or rollers.

• Fluid bearings use a thin layer of liquid or gas to reduce friction.

• Examples: Ball bearings - deep groove ball bearing, Roller bearings - cy...read more
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Q2. Difference between petrol engine & diesel engine
Ans. 
Petrol engines use spark ignition, while diesel engines use compression ignition.
• Petrol engines use a spark plug to ignite the air-fuel mixture, while diesel engines rely on compression to ignite the fuel.

• Petrol engines are lighter and more responsive, while diesel engines are more fuel efficient and have higher torque.

• Petrol engines are typically used in cars and motorcycles, while diesel engines are commonly found in
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Q3. Types of gears.
Ans. 
Types of gears include spur gears, helical gears, bevel gears, worm gears, rack and pinion gears, and planetary gears.
• Spur gears have straight teeth and are the simplest type of gear.

• Helical gears have angled teeth for smoother and quieter operation.

• Bevel gears have cone-shaped teeth and are used to change the direction of rotation.

• Worm gears have a screw-like appearance and provide high gear reduction ratios.

• Rack and ...read more
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Q4. Show in tools name.
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Q1. What kind of hydraulic breakdown you faces
Ans. 
I have faced various hydraulic breakdowns in my career as a Mechanical Maintenance Engineer.
• One common hydraulic breakdown is a leak in the hydraulic system, which can be caused by worn-out seals or damaged hoses.

• Another issue is a hydraulic pump failure, which can occur due to excessive wear and tear or lack of proper maintenance.

• Clogged or blocked hydraulic filters can also lead to breakdowns, as they restrict the fl...read more
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Q2. What is difference between hydraulic and pneumatic system
Ans. 
Hydraulic systems use liquid to transmit power, while pneumatic systems use compressed air.
• Hydraulic systems use incompressible fluids like oil or water, while pneumatic systems use compressed air or gas.

• Hydraulic systems can generate higher forces and are used in heavy machinery like cranes and excavators.

• Pneumatic systems are lighter and more flexible, commonly used in applications like air brakes in vehicles.

• Hydraul...read more
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Jsw Steel is a best company

Q1. Sir company kis cheez ka manufacturing krti hai
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Q1. Sir company ka future me goal kya hai
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Q1. Basic questions
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Q2. What is your name
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Q3. Total experience
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Q4. Are u interested
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Q5. What is preventive maintenance
Ans. 
Preventive maintenance is a proactive approach to maintenance that involves regularly inspecting, servicing, and repairing equipment to prevent breakdowns and extend its lifespan.
• Preventive maintenance involves scheduled inspections and maintenance tasks.

• It aims to identify and address potential issues before they cause equipment failure.

• Examples of preventive maintenance include lubricating moving parts, replacing wor...read more
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