Maxxis Rubber Mechanical Maintenance Engineer Interview Questions and Answers

Q1. What is limit switch.
Ans. 
A limit switch is a device that is used to detect the presence or absence of an object within a certain range of motion.
• Limit switches are commonly used in industrial applications to control machinery and equipment.

• They consist of an actuator that is mechanically linked to a set of contacts, which are opened or closed depending on the position of the actuator.

• Limit switches can be used to stop the motion of a machine w...read more
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Q2. Types of cooling use in dies.
Ans. 
Types of cooling used in dies include water cooling, air cooling, and oil cooling.
• Water cooling: uses water to remove heat from the die

• Air cooling: uses air to cool the die

• Oil cooling: uses oil to dissipate heat from the die
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Q3. Material and hrc of die parts.
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Material and hrc of die parts are crucial for determining the durability and performance of the parts.
• Material selection for die parts depends on factors like strength, wear resistance, and thermal conductivity.

• Common materials used for die parts include tool steels like H13, D2, and A2.

• Hardness of die parts is typically measured using Rockwell Hardness Scale (HRC).

• Higher HRC values indicate greater hardness and wear r...read more
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Q4. What type of breakdown in dies on machine.
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Breakdown in dies on machine can be due to wear and tear, misalignment, overheating, or material defects.
• Wear and tear from continuous use can lead to cracks or breakage in the dies.

• Misalignment of the dies can cause them to wear unevenly or break prematurely.

• Overheating of the dies can weaken their structure and lead to failure during operation.

• Material defects in the dies, such as impurities or weak spots, can cause ...read more
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Q1. Introduction and family background.
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Q2. Do you now anyone in Ahresty.
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Q3. Salary discussion.
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Q1. What are the lathe machine?
Ans. 
Lathe machines are tools used for shaping and cutting materials such as metal and wood.
• Lathe machines rotate a workpiece on its axis while a cutting tool is applied to shape it.

• They can be used for various operations such as drilling, knurling, and sanding.

• There are different types of lathe machines such as engine lathes, turret lathes, and CNC lathes.

• Lathe machines are commonly used in manufacturing and metalworking i...read more
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Q2. Types lathe , types milling
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GD is a discussion that tests the candidate skills such as leadership skills, commutation skills, social skills, behaviour, politeness, teamwork.

An aptitude test is designed to assess an individual's ability to perform certain tasks or react to a range of different situations. These tests are often used by educational institutions and employers to evaluate potential candidates' skills, talents, and potential for success in a specific role or academic program. Here are some key details about aptitude tests:

1. **Purpose**: Aptitude tests are used to measure a variety of skills, including logical reasoning, verbal ability, numerical skills, and spatial awareness. They help to identify strengths and weaknesses and predict future performance.

2. **Types**:
- **Verbal Reasoning**: Assesses understanding and reasoning using concepts framed in words.
- **Numerical Reasoning**: Tests ability to work with numbers, including basic arithmetic, data interpretation, and logical problem-solving.
- **Abstract Reasoning**: Evaluates the ability to identify patterns, logical rules, and trends in new data.
- **Mechanical Reasoning**: Measures understanding of mechanical and physical principles.
- **Spatial Reasoning**: Assesses the ability to visualize and manipulate objects.

3. **Format**: Aptitude tests can be multiple-choice, true/false, or involve practical problem-solving tasks. They are often timed, with specific sections dedicated to each type of reasoning.

4. **Preparation**:
- **Practice Tests**: Taking practice tests helps familiarize with the format and types of questions.
- **Study Guides**: Reviewing basic concepts in mathematics, grammar, and logical reasoning.
- **Skills Development**: Enhancing skills through puzzles, reading, and other related activities.

5. **Usage**:
- **Recruitment**: Employers use aptitude tests to screen job applicants and find the best fit for a role.
- **Education**: Schools and colleges use these tests for admissions, placement, and identifying areas for student improvement.
- **Career Counseling**: Helps individuals understand their strengths and areas for improvement, guiding career choices.

6. **Scoring**: Scores are typically presented as percentiles, showing how a test-taker compares to a norm group. Higher scores indicate better performance relative to the norm group.

If you have specific questions about a certain type of aptitude test or need preparation tips, feel free to ask!

Q1. Tell me about yourself.Tip: Provide a brief overview of your professional background, focusing on experiences relevant to the job you're applying for. Highlight your key achievements and skills.
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Q2. Know YourselfAssess and interest.
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Q1. What is star delta starter?
Ans. 
Star delta starter is a type of reduced voltage starter used in induction motors to reduce starting current.
• Consists of two contactors - one for star connection and one for delta connection

• Initially motor is started in star connection to reduce starting current

• After a set time, motor is switched to delta connection for full speed operation

• Used in applications where high starting current can damage equipment
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Q2. How to use third party device in plc what is process?
Ans. 
To use a third party device in a PLC, you need to establish communication protocols and configure the PLC to send and receive data from the device.
• Identify the communication protocol supported by the third party device (e.g. Modbus, Profibus)

• Configure the PLC to communicate with the third party device using the identified protocol

• Map the data points between the PLC and the third party device to ensure seamless data exc...read more
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Q3. What is eddy current formula?
Ans. 
The eddy current formula calculates the magnitude of induced currents in a conductor due to a changing magnetic field.
• The formula is given by: I = π * D * f * B * σ

• Where I is the eddy current (A)

• D is the diameter of the coil (m)

• f is the frequency of the magnetic field (Hz)

• B is the magnetic field strength (T)

• σ is the conductivity of the material (S/m)
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Q4. What methods can be used to improve the power factor of a 130 kW load with a power factor of 0.7, and what rating of capacitor is required for this improvement?
Ans. 
To improve the power factor of a 130 kW load with a power factor of 0.7, capacitors can be used. The required rating of the capacitor depends on the desired power factor improvement.
• Install capacitors in parallel with the load to improve power factor

• Calculate the required capacitance using the formula: C = (P * tan(acos(pf))) / (V^2)

• Choose capacitors with the appropriate voltage and capacitance rating for the load

• Ensur...read more
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Q1. What questions were asked regarding your family background, specifically about your mother, brother, wife, and daughter?
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Q2. What are two reasons why we should hire you?
Ans. 
I have a strong background in maintenance engineering and a proven track record of improving efficiency and reducing downtime.
• Extensive experience in troubleshooting and repairing mechanical and electrical systems

• Proven ability to implement preventive maintenance programs to increase equipment reliability

• Strong communication skills to work effectively with cross-functional teams

• Certified in relevant maintenance enginee
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Q1. What is eddy current What is 5s tpm What is electromagnetic induction What formula of rpm measurement How dc motor work How you daily shift handover takeover How deal with major breakdown How star delta ...read more
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Questions related to maintenance engineering including eddy current, 5S TPM, electromagnetic induction, RPM measurement, DC motor, shift handover, major breakdown, and star delta starter.
• Eddy current is a current induced in a conductor due to a changing magnetic field

• 5S TPM is a methodology for workplace organization and standardization

• Electromagnetic induction is the production of an electromotive force across a condu...read more
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Q1. Family baground and eduction oral discussion
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Q1. Machine related questions Ans Injections moulding horizontal type machine handle
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