Maruti Suzuki Qa Mechanical Engineer Interview Questions and Answers

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Q1. Your self introduction
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Q2. Core mechanical questions
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Q1. Discusing obout the company
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Q2. The package
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Q1. What is the capacity of diesel and petrol
Ans. 
Diesel has higher energy density than petrol, resulting in better fuel efficiency.
• Diesel has a higher energy density than petrol, meaning it can provide more energy per unit volume.

• Petrol is more volatile and burns faster than diesel.

• The capacity of diesel and petrol tanks in vehicles can vary depending on the size of the vehicle and its fuel efficiency.

• For example, a typical car may have a petrol tank capacity of arou...read more
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Q2. Difference b/w petrol engine & diesel engine
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Petrol engines use spark ignition, while diesel engines use compression ignition.
• Petrol engines use a spark plug to ignite the fuel-air mixture, while diesel engines rely on compression to ignite the fuel.

• Petrol engines are lighter and more responsive, while diesel engines are more fuel-efficient and have higher torque.

• Petrol engines are more common in cars and motorcycles, while diesel engines are often used in trucks
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Q3. What is meant by LNTD
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LNTD stands for Logarithmic Mean Temperature Difference.
• LNTD is a term used in heat transfer calculations to determine the overall temperature difference between two fluids in a heat exchanger.

• It is calculated using the formula LNTD = (ΔT1 - ΔT2) / ln(ΔT1 / ΔT2), where ΔT1 and ΔT2 are the temperature differences at the two ends of the heat exchanger.

• LNTD is important in designing efficient heat exchangers to maximize h...read more
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Q1. I am intresting production line
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Q2. Diploma in mechanical
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Q3. Good production line
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Q4. I am good performance
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Q5. I am intresting production supervisor
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Q1. Obd full form in vehicle
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On-Board Diagnostics
• On-Board Diagnostics (OBD) is a system in vehicles that monitors the performance of the engine and emissions systems.

• It helps to identify issues and malfunctions by providing codes that can be read with a diagnostic tool.

• OBD systems have evolved over the years, with OBD-II being the current standard in most vehicles.

• Examples of OBD codes include P0300 for random misfire and P0420 for catalytic conve
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Q1. What are the type of sections
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Sections in mechanical engineering design refer to the shapes of cross-sections of structural members.
• Sections can be classified as open or closed.

• Open sections have an opening or a void in the cross-section, such as a C-channel or an I-beam.

• Closed sections have a continuous cross-section, such as a rectangular or circular tube.

• Sections can also be classified based on their shape, such as square, rectangular, circular,...read more
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Q2. What is centre of gravity? write the formula to calculate it for an assymetrical I section
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Centre of gravity is the point where the entire weight of an object can be considered to act upon. Formula for an asymmetrical I section is (A1*d1 + A2*d2)/(A1+A2)
• Centre of gravity is important in designing structures and machines to ensure stability and balance

• It is the point where the object will balance perfectly in any orientation

• For an asymmetrical I section, the formula is (A1*d1 + A2*d2)/(A1+A2) where A1 and A2 ...read more
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Q3. Draw sfd and bmd for a simple cantilever beam
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Draw sfd and bmd for a simple cantilever beam
• SFD shows the variation of shear force along the length of the beam

• BMD shows the variation of bending moment along the length of the beam

• Shear force is maximum at the fixed end and zero at the free end

• Bending moment is maximum at the free end and zero at the fixed end
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Q1. 7qc tool 5s PFMA Red bin analysis
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