Micro Labs Electrical Maintenance Engineer Interview Questions and Answers

Q1. What is IC engine
Ans. 
An IC engine, or internal combustion engine, is a type of engine that generates power by burning fuel inside the engine itself.
• IC engines are commonly used in vehicles such as cars, motorcycles, and trucks.

• They work by igniting a mixture of fuel and air inside a combustion chamber, which creates high-pressure gases that move pistons to generate power.

• There are two main types of IC engines: spark-ignition engines (petro...read more
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Q2. What is refrigeration
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Refrigeration is a process of removing heat from a space or substance to lower its temperature.
• Refrigeration involves the use of refrigerants to absorb and release heat.

• It is used in various applications such as air conditioning, food preservation, and industrial processes.

• The basic components of a refrigeration system include a compressor, condenser, expansion valve, and evaporator.

• Refrigeration systems work on the pr...read more
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Q1. Details explaination about HVAC
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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
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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. Machine and power system
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Q2. What is a machine? Principal of machine? Adwantage of high voltage?
Ans. 
A machine is a device that uses energy to perform a task. The principle of a machine is to make work easier. High voltage has advantages in power transmission.
• A machine is a mechanical or electrical device that uses energy to perform a task.

• The principle of a machine is to make work easier by multiplying force or changing the direction of force.

• Examples of machines include engines, motors, pumps, and generators.

• High vo...read more
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Q3. What is skin effect?
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Skin effect is the tendency of high-frequency alternating current to flow near the surface of a conductor.
• Skin effect occurs due to the self-inductance of the conductor.

• It increases with frequency and decreases with the diameter of the conductor.

• It can cause power loss and distortion in high-frequency applications.

• It is mitigated by using stranded conductors or hollow conductors.

• Example: Skin effect is a major concern ...read more
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Q1. Tell me about yourself.
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Anshu pal

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