Indian Steel Corporation 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
Ans. 
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. Have clear understanding of basic Electrical concept & Practice to have interview in English .
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MCQ Question of total 10 question

Q1. What do you mean by Reverse Arc Flashing on ACB Breaker
Ans. 
Reverse arc flashing on ACB breaker refers to the phenomenon where the arc flash occurs on the opposite side of the contacts during the opening operation.
• Reverse arc flashing happens when the arc flash occurs on the side of the contacts opposite to the normal direction during the opening operation of the ACB breaker.

• This phenomenon can be caused by factors such as high fault currents, improper maintenance, or inadequat...read more
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Q1. Why you want to leave your present company
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Q1. Power factor What is vfd Difference between ac and dc motor
Ans. 
Power factor is the ratio of real power to apparent power in an AC circuit. VFD stands for Variable Frequency Drive. AC motors run on alternating current while DC motors run on direct current.
• Power factor is a measure of how effectively electrical power is being used in a circuit.

• It is calculated by dividing the real power (in watts) by the apparent power (in volt-amperes).

• A power factor of 1 indicates that all the pow...read more
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Q2. Types of load cell
Ans. 
Types of load cells include strain gauge load cells, hydraulic load cells, and capacitive load cells.
• Strain gauge load cells measure the strain or deformation of a material.

• Hydraulic load cells use hydraulic fluid to measure force.

• Capacitive load cells measure changes in capacitance to determine force.

• Other types of load cells include piezoelectric load cells and pneumatic load cells.
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