Holcim Mechanical Engineer Interview Questions and Answers

Q1. What are the steps to dismantle turbine?
Ans. 
The steps to dismantle a turbine involve shutting down the system, disconnecting power sources, removing external components, disassembling internal parts, and safely disposing of any hazardous materials.
• Shut down the turbine system and ensure it is completely powered off.

• Disconnect all power sources to prevent any accidents during dismantling.

• Remove any external components such as casing, covers, and piping.

• Disassembl...read more
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Q1. About crusher type model, make general maintenance About compressor, water pump. About raw mill model, make & general maintenance schedule
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Q1. Basics mechanical question
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Q2. What is a thermodynamics
Ans. 
Thermodynamics is the branch of physics that deals with the relationships between heat and other forms of energy.
• Thermodynamics studies the transfer of energy in the form of heat and work.

• It involves concepts like entropy, temperature, and energy conversion.

• Examples include the efficiency of engines, refrigeration systems, and phase transitions in materials.
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Q3. Third law of motion
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The third law of motion states that for every action, there is an equal and opposite reaction.
• States that when one object exerts a force on a second object, the second object exerts an equal and opposite force on the first object

• The forces always occur in pairs

• Examples include a rocket pushing against the ground to lift off, or a person pushing against a wall
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Q4. Types of bearing
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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 simple surface with no moving parts

• Fluid bearings: use a thin layer of liquid or gas to reduce friction
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On maths and logical reasoning MCQ based questions being asked

Q1. Basic details of yourself
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Q2. Mental skills of candidates being check
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Q1. Pump and motor allignment various processes
Ans. 
Proper alignment of pumps and motors is crucial for efficient operation and preventing damage.
• Ensure the pump and motor shafts are parallel and at the same height to prevent misalignment.

• Use alignment tools such as dial indicators or laser alignment systems for precision.

• Regularly check and adjust alignment to prevent wear and tear on components.

• Improper alignment can lead to increased energy consumption, vibration, an...read more
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Q2. Details about fume extraction system and Dense phase conveying system being asked
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Q3. Difference between pump and compressor
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Pump moves liquid from one place to another, while compressor compresses gas to increase pressure.
• Pump is used to move liquids, while compressor is used to increase pressure of gases.

• Pump operates at lower pressure, while compressor operates at higher pressure.

• Examples of pumps include water pumps in cars, while examples of compressors include air compressors in HVAC systems.
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Q1. Function s of Belt conveyors and clinker Hopper & Roller press & cement silo
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Belt conveyors transport materials, clinker hopper stores clinker, roller press crushes materials, cement silo stores cement.
• Belt conveyors are used to transport materials from one location to another in a production process.

• Clinker hopper is a storage unit for clinker, a material used in cement production.

• Roller press is a machine used to crush materials before they are fed into the cement production process.

• Cement si...read more
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Q2. Long conveyor Erection processor and Time of completion the job and . Good safety Manner
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Q3. Sufficient Man power of 1000mtrs Belt conveyor structure Trassel assembly work & Gallery Assembly work time of erection time.
Ans. 
The time required for the erection of a 1000mtrs belt conveyor structure trassel assembly work and gallery assembly work depends on the manpower available.
• The time of erection will vary based on the experience and efficiency of the workers involved.

• Factors such as complexity of the structure, availability of equipment, and coordination among the team members will also impact the assembly time.

• For example, if there are ...read more
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Q4. Time of Belt laying and assembly the Gear box motor Alignment and fix the pulley s
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The time required for belt laying, gear box motor assembly, and pulley alignment depends on various factors such as complexity, experience of the engineer, and availability of tools.
• The time for belt laying can vary based on the length and type of belt being used.

• Assembling the gear box motor may take longer if it involves intricate components or precise alignment.

• Fixing the pulley s can be quick if the engineer is exp...read more
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Q1. Clinker Hopper and weigh Feeder and Bag Filter Fan & De-Dusting line and Compressor pipe line.
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Q2. Capacity of each Hopper & Dia of Hopper and length of Belt conveyor capacity of Gear box motor load RPM.
Ans. 
The capacity of each hopper, diameter and length of belt conveyor, capacity of gearbox motor load, and RPM are important factors in mechanical engineering.
• Capacity of each hopper refers to the maximum amount of material it can hold at one time.

• Diameter and length of belt conveyor determine the amount and speed of material that can be transported.

• Capacity of gearbox motor load indicates the maximum load the motor can ha...read more
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Q1. Salary discussion and my personal details
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Q2. Working in previous company salary payslip
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Q1. Conveyor AGV and robotics
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Q1. Tell us abt yourself
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Q2. Majority experience in field
Ans. 
I have 5 years of experience in the mechanical engineering field.
• Worked as a mechanical engineer for 5 years

• Experience in designing and testing mechanical systems

• Proficient in CAD software such as SolidWorks and AutoCAD

• Familiar with industry standards and regulations

• Collaborated with cross-functional teams to complete projects
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Q1. What type of pums used in cooler
Ans. 
Centrifugal pumps are commonly used in coolers for circulating the coolant fluid.
• Centrifugal pumps are commonly used in coolers for their ability to efficiently circulate fluids.

• Other types of pumps like diaphragm pumps or piston pumps may also be used in coolers depending on the specific application.

• The pump used in a cooler should be selected based on factors like flow rate, pressure requirements, and fluid compatibi...read more
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