Indian Oil Corporation Mechanical Maintenance Technician Interview Questions and Answers

Q1. Tell the working principle of industrial compressors
Ans. 
Industrial compressors work by increasing the pressure of a gas to create mechanical energy.
• Industrial compressors use a motor to draw in and compress gas, then release it at a higher pressure.

• The compressed gas can be used for various industrial applications such as powering pneumatic tools or HVAC systems.

• Common types of industrial compressors include reciprocating, rotary screw, and centrifugal compressors.
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Q2. Overhauling procedure of centrifugal pump
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The overhauling procedure of a centrifugal pump involves disassembling, inspecting, repairing/replacing components, and reassembling the pump.
• Start by shutting off power to the pump and draining the system

• Remove the pump casing and impeller to access internal components

• Inspect components for wear, damage, or corrosion

• Repair or replace damaged components such as bearings, seals, or impeller

• Reassemble the pump, ensuring ...read more
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Q1. Tell me about yourself
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Q2. Favorite subject
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Q3. Scavenging, spoliers, gas cycles, etc.
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Q1. Biggest achievement
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Q2. Have you any time involved in decision making, can be during any task
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Q1. If any emergency what can do
Ans. 
In case of an emergency, I would remain calm, assess the situation, and take appropriate action to ensure the safety of all individuals involved.
• Remain calm and assess the situation quickly

• Follow emergency protocols and procedures

• Ensure the safety of all individuals involved

• Contact emergency services if necessary

• Provide first aid or medical assistance if trained to do so
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Q2. How is responsible in work side
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Q1. What's automobile industry
Ans. 
The automobile industry is a sector that designs, manufactures, and sells motor vehicles, including cars, trucks, and motorcycles.
• Involves the production of vehicles such as cars, trucks, and motorcycles

• Includes designing, manufacturing, and selling of motor vehicles

• Incorporates various components like engines, chassis, and electrical systems

• Involves research and development for innovation and improvement

• Global industr...read more
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Q2. How maintain commercial vehicle sigment
Ans. 
Maintaining commercial vehicles involves regular inspections, servicing, and repairs to ensure optimal performance and safety.
• Perform regular inspections of the vehicle's engine, brakes, tires, and other critical components.

• Follow manufacturer's recommended maintenance schedule for oil changes, filter replacements, and other routine tasks.

• Address any issues or malfunctions promptly to prevent further damage and ensure ...read more
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Q3. Automobile is a self-propelled vehicle which is used to carry the goods and passenger on the ground
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Q1. What's internal combustion engine
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An internal combustion engine is a type of engine that generates power by burning fuel inside the engine itself.
• Uses combustion of fuel within the engine to generate power

• Commonly used in vehicles such as cars, motorcycles, and trucks

• Consists of cylinders, pistons, spark plugs, and a fuel delivery system

• Two main types are gasoline and diesel engines
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Q2. How work internal combustion engine
Ans. 
Internal combustion engines work by burning fuel inside a combustion chamber to create controlled explosions that drive pistons and generate mechanical power.
• Fuel and air mixture is ignited inside the combustion chamber

• The resulting explosion pushes the piston down, converting the energy into mechanical motion

• The piston is connected to a crankshaft, which converts the linear motion into rotational motion

• The rotational ...read more
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Q1. Projects in CV, welding, GD&T
Ans. 
I have experience working on projects involving welding and applying GD&T principles.
• Completed a project where I designed and welded a steel frame for a small vehicle

• Utilized GD&T principles to ensure precise measurements and tolerances in a project involving machining parts for an assembly line

• Familiar with interpreting engineering drawings and applying GD&T symbols accurately
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Mainly on basic details

Q1. Normal and easy to tackle
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Q2. Mainly on hobbies
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Q3. Your favorite book and explain it by your own words
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Q1. Engine relented question and preventive maintenance
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Q2. Technical issue gear box
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Q1. Basic Question related to mechanical basics
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Q1. Tell me about yourself
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Q2. Strength & Weakness, Where you see 5 years from now.
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