National Designer Display System PPC Engineer Interview Questions and Answers

Q1. Introduce yourself
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Q2. What are your strengths
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Q3. Asked about the role
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Q4. Asked about projects
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Q5. Projects related qns
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Q1. What is 7qc tool
Ans. 
7QC tools are a set of quality control tools used for process improvement and problem-solving in quality management.
• 1. Check sheets: Used to collect and analyze data in a systematic way.

• 2. Pareto chart: Helps identify the most significant factors contributing to a problem.

• 3. Cause and effect diagram (Fishbone diagram): Used to identify and analyze potential causes of a problem.

• 4. Histogram: Represents data distribution...read more
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Q2. Least count of micrometer
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The least count of a micrometer is the smallest measurement that can be read on the scale of the micrometer.
• The least count of a micrometer is typically 0.01 mm or 0.001 mm depending on the type of micrometer.

• It is determined by the number of divisions on the thimble and the pitch of the screw.

• For example, a micrometer with 50 divisions on the thimble and a pitch of 0.5 mm would have a least count of 0.01 mm.
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Q1. How do you calculate the displacement of a bike with no tools
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To calculate the displacement of a bike without tools, measure the distance traveled in one full rotation of the wheel
• Measure the circumference of the bike's wheel

• Count the number of rotations the wheel makes over a certain distance

• Multiply the circumference by the number of rotations to get the displacement

• Displacement = Circumference of wheel x Number of rotations
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1st consists of Gaming, Aptitude, pseudo code, Essay writing

Q1. Yet to take the interview
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1 Hour duration, High level apptitude

Q1. Domain basis question
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Q1. Salary discussion & many more
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Q1. Sucrose structure
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Q2. Basic knowledge of ISO, HACCP, CCP
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Q1. 1). Where you have worked?
Ans. I told about my past job experience.
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Q2. 2). What is TDC and BDC and how do you understand about it?
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TDC stands for Top Dead Center and BDC stands for Bottom Dead Center. They are reference points in the rotation of an engine's crankshaft.
• TDC is the point where the piston is at its highest position in the cylinder during the compression stroke.

• BDC is the point where the piston is at its lowest position in the cylinder during the exhaust stroke.

• Understanding TDC and BDC is crucial for timing engine components such as v...read more
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Q3. 3). How you will measure clearance of TDC and BDC for vertical reciprocating compressor ?
Ans. 
The clearance of TDC and BDC for a vertical reciprocating compressor can be measured using a dial indicator.
• Use a dial indicator to measure the distance between the top dead center (TDC) and bottom dead center (BDC) positions of the piston.

• Rotate the crankshaft to bring the piston to TDC and set the dial indicator to zero.

• Rotate the crankshaft to bring the piston to BDC and note the reading on the dial indicator.

• The di...read more
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Q4. 4). How you will measure the clearance for big end bearing ?
Ans. 
The clearance for big end bearing can be measured using a micrometer or a feeler gauge.
• Use a micrometer to measure the diameter of the crankshaft journal and the inner diameter of the big end bearing. The clearance is calculated by subtracting the crankshaft journal diameter from the bearing inner diameter.

• Alternatively, a feeler gauge can be used to measure the clearance by inserting the gauge between the crankshaft j...read more
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Q5. 5). What thing should focus during the suction and discharge valve box up ?
Ans. 
Focus on proper alignment, tightness, material compatibility, and proper torque during suction and discharge valve box up.
• Ensure proper alignment of the valves to prevent leakage

• Check for tightness of the connections to avoid any leaks

• Use materials compatible with the fluid being handled to prevent corrosion or damage

• Apply the correct torque to the bolts to ensure a secure connection
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