Harman Finochem Maintenance Engineer Interview Questions and Answers

Q1. Why use Star delta stater in induction motor
Ans. 
Star delta starter is used in induction motors to reduce starting current and torque.
• Reduces starting current by starting the motor in star connection and then switching to delta connection

• Reduces starting torque to prevent mechanical stress on the motor and connected equipment

• Suitable for applications where high starting current and torque are not required, such as fans, pumps, and compressors
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Q2. Motor direction chang with out connection change
Ans. 
This can be achieved by changing the phase sequence of the motor.
• Motor direction can be changed by swapping any two of the three-phase wires.

• This will change the phase sequence and hence the direction of rotation.

• For example, swapping wires A and B in a three-phase motor will change the direction of rotation.
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Q3. What is plc full form
Ans. 
PLC stands for Programmable Logic Controller.
• PLC is a digital computer used for automation of electromechanical processes.

• It is commonly used in industries to control machinery and processes.

• PLCs are programmed using specialized software to perform specific tasks.

• Examples of PLC brands include Siemens, Allen-Bradley, and Mitsubishi.
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Q4. What is automatically plant
Ans. 
An automatically plant is a facility where various processes are controlled and operated automatically without the need for constant human intervention.
• Automatically controlled processes

• Utilizes sensors and programmable logic controllers (PLCs)

• Reduces the need for manual labor

• Examples: automated assembly lines, robotic manufacturing plants
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Q5. Transformer principal
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Q1. Details explaination about HVAC
Ans. 
HVAC stands for Heating, Ventilation, and Air Conditioning. It refers to the technology used for indoor environmental comfort.
• HVAC systems control temperature, humidity, and air quality in buildings.

• Heating is provided through furnaces, boilers, or heat pumps.

• Ventilation involves the exchange of indoor and outdoor air to maintain air quality.

• Air conditioning cools and dehumidifies the air using refrigeration cycles.

• HVA...read more
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Q2. How to calculate theACPH..?
Ans. 
ACPH can be calculated by dividing the total annual cooling load by the total annual cooling hours.
• ACPH stands for Annual Cooling Performance Hours.

• To calculate ACPH, you need to know the total annual cooling load and the total annual cooling hours.

• Divide the total annual cooling load by the total annual cooling hours to get the ACPH value.

• For example, if the total annual cooling load is 1000 kWh and the total annual c...read more
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Q3. Classification of clean room
Ans. 
Clean rooms are classified based on the level of cleanliness required for specific applications.
• Clean rooms are classified according to the number and size of particles allowed per cubic meter of air.

• The classification is determined by international standards such as ISO 14644-1.

• Clean room classifications range from ISO Class 1 (highest cleanliness) to ISO Class 9 (lowest cleanliness).

• Each classification has specific r...read more
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Q4. Type of bearing..?
Ans. 
There are various types of bearings used in engineering, including ball bearings, roller bearings, and plain bearings.
• Ball bearings are the most common type of bearing and consist of a series of balls held in a raceway.

• Roller bearings use cylindrical or tapered rollers to support a load.

• Plain bearings, also known as bushings, have a sliding surface and are used when low friction is required.

• Other types of bearings incl...read more
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Q5. Equipment qualification..?
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Q1. Transformer dg
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Q2. Plc motor dol start
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Q1. Transformer dg
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Q1. Education all company experience certificate checking
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Q1. What are the different types of maintenance?
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Q2. What are the performance parameters of a cooling tower?
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Q3. What is boiler efficiency, and what methods can be employed to improve it specifically in wood boilers?
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Q4. What are the different types of reactors and their applications?
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Q5. What are the different types of water chillers and what design considerations should be taken into account?
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Q6. What are preventive maintenance and breakdown maintenance?
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Q7. What are the design considerations for a condenser intended for a reactor with a 10 KL capacity?
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Q8. What is calibration, and why is it necessary in the pharmaceutical industry?
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Q1. Introduce yourself
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Q2. Family background
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Q1. Qualification related
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Q2. Project related
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Q3. Autocad related
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Q4. Documentation related
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Q1. Tell me about yourself.
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Q1. Chillar . boilers .ro .air compressor .air dry.nitroge
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