Sunbeam Auto Assistant Maintenance Engineer Interview Questions and Answers

Q1. Star delta starter control circuit
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Q2. DG full load current
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Q1. Which bearing used in CNC spindle? And why ?
Ans. 
Angular contact ball bearings are commonly used in CNC spindles due to their ability to handle both radial and axial loads.
• Angular contact ball bearings are used in CNC spindles because they can handle both radial and axial loads efficiently.

• These bearings provide high rigidity and accuracy, which are crucial for CNC machining operations.

• The contact angle of angular contact ball bearings can be adjusted to optimize per...read more
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Q2. What is Backlash?and how to check it ?
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Backlash is the amount of clearance or play between two mating components in a mechanical system.
• Backlash is commonly found in gear systems, where it can affect the accuracy and efficiency of the system.

• To check backlash, one can use a dial indicator to measure the amount of movement between the components when they change direction.

• Backlash can be adjusted by tightening or loosening the components to reduce the cleara...read more
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Q3. How many types of Hydraulic valve are there ? Diffenciate between pressure relief and pressure reducing valve.
Ans. 
There are various types of hydraulic valves, including pressure relief and pressure reducing valves.
• Types of hydraulic valves include directional control valves, flow control valves, pressure control valves, and check valves.

• Pressure relief valves are designed to limit the pressure within a hydraulic system by diverting excess fluid when the pressure reaches a certain level.

• Pressure reducing valves, on the other hand, ...read more
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Q1. What is the plc
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PLC stands for Programmable Logic Controller, a digital computer used for automation of electromechanical processes.
• PLC is used to control machinery in industries by programming sequences of operations.

• It is designed to withstand harsh industrial environments.

• PLCs can be programmed using ladder logic, function block diagrams, or structured text.

• They are commonly used in manufacturing, automotive, and food processing in...read more
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Q2. What is cnc machine
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A CNC machine is a computer-controlled machine tool used for cutting, shaping, and finishing metal, wood, or other materials.
• CNC stands for Computer Numerical Control

• CNC machines use coded instructions to control the movement of the cutting tool

• Common types of CNC machines include milling machines, lathes, and routers

• CNC machines are widely used in manufacturing industries for precision machining
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Q3. What is servo drive
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A servo drive is an electronic amplifier used to power and control servo motors in automation systems.
• Converts low-power control signals into high-power signals to drive the servo motor

• Provides precise control over the speed, position, and torque of the motor

• Used in robotics, CNC machines, conveyor systems, etc.
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Q4. External encorder by pass parameter in cnc
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External encoder bypass parameter in CNC allows the machine to ignore the feedback from the external encoder and use internal feedback instead.
• External encoder bypass parameter is used in CNC machines to switch between using external encoder feedback and internal feedback.

• This parameter is typically used when the external encoder is malfunctioning or needs to be bypassed for testing purposes.

• By setting the bypass param...read more
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Basic from our bachelor degree

Q1. Simple question about my self and some technical questions
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Q1. Basics core subject questions
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Q1. Dept oriented questions
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Q2. Genral , plc , utility , CNC Type questions
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Q1. Draw a circuit diagram to convert 230v ac to 24v dc.
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Q2. PLC Ladder logic Diagram
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Q1. Working of motor
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A motor converts electrical energy into mechanical energy to produce motion.
• Electricity flows through the motor's coils, creating a magnetic field that interacts with the motor's permanent magnets.

• This interaction causes the motor's rotor to spin, which in turn drives the motor's output shaft.

• The speed and torque of the motor can be controlled by adjusting the amount of electrical current flowing through the coils.

• Diff...read more
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Q2. Plc base questions
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Q3. Utility base questions
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