TÜV SÜD Interview Questions and Answers

Q1. ,%of water absorption of bricks
Ans. 
Water absorption in bricks indicates their porosity and quality, typically ranging from 5% to 20%.
• Bricks with lower water absorption (5-10%) are generally stronger and more durable.

• High water absorption (15-20%) can indicate poor quality or excessive porosity.

• For example, clay bricks usually absorb around 10-15% water.

• Concrete bricks may have lower absorption rates, often below 5%.
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Q2. Maximum slump value for casting
Ans. 
The maximum slump value for casting typically ranges from 75 to 100 mm, depending on the application and mix design.
• Slump test measures the workability of concrete.

• A slump of 75-100 mm is ideal for structural elements.

• Higher slump values (up to 150 mm) may be used for complex shapes.

• Excessive slump (>150 mm) can lead to segregation of aggregates.
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Q3. Crossing strength of concrete
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Crossing strength of concrete refers to its ability to withstand loads without failure, crucial for structural integrity.
• Concrete's crossing strength is measured by its compressive strength, typically expressed in megapascals (MPa).

• For example, a standard mix of concrete might have a compressive strength of 25 MPa, suitable for residential structures.

• Factors affecting crossing strength include water-cement ratio, aggre...read more
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Q4. Sand and cement retio for brick masonry
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The sand and cement ratio for brick masonry typically ranges from 1:4 to 1:6, depending on the strength required.
• A common mix for brick masonry is 1 part cement to 5 parts sand (1:5) for general construction.

• For stronger structures, a ratio of 1:4 may be used, especially in load-bearing walls.

• In some cases, a 1:6 ratio is sufficient for non-load-bearing walls or decorative brickwork.

• The choice of ratio also depends on ...read more
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Q5. Compressive strength of bricks
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Compressive strength of bricks is a measure of their ability to withstand axial loads without failure.
• Compressive strength is typically measured in megapascals (MPa).

• Common bricks have a compressive strength ranging from 3.5 to 7.5 MPa.

• Engineering bricks can have compressive strengths exceeding 20 MPa.

• Testing involves applying load until failure, often using a universal testing machine.

• Higher compressive strength indic...read more
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Q6. What is clear cover and effective cover
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Clear cover is the distance from the surface of concrete to the reinforcement, while effective cover accounts for corrosion and other factors.
• Clear cover is essential for protecting reinforcement from environmental factors.

• Effective cover considers the actual depth of concrete after shrinkage and other factors.

• For example, if the clear cover is specified as 25mm, the effective cover may be less due to concrete shrinkag...read more
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Q7. Sand cement aggregate retio for M20 gread concrete
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M20 grade concrete typically uses a mix ratio of 1:1.5:3 for cement, sand, and aggregate respectively.
• M20 concrete mix ratio: 1 part cement, 1.5 parts sand, 3 parts aggregate.

• Total parts in M20 mix = 1 + 1.5 + 3 = 5.5.

• For 1 cubic meter of M20 concrete, approximately 400 kg of cement, 600 kg of sand, and 1200 kg of aggregate are used.

• Water-cement ratio is crucial; typically around 0.5 for M20 grade.
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Q8. Dimensions of modular brick
Ans. 
Modular bricks are standardized bricks used in construction, typically measuring 190mm x 90mm x 90mm.
• Modular bricks are designed for easy handling and uniformity in construction.

• Common dimensions include 190mm (length) x 90mm (width) x 90mm (height).

• These dimensions allow for efficient stacking and alignment in walls.

• Modular bricks can be used in various applications, such as residential and commercial buildings.
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Q9. What type of sand is used in plastering
Ans. 
Fine sand, typically river or manufactured sand, is used in plastering for a smooth finish and good adhesion.
• Fine sand is preferred for plastering due to its small particle size.

• River sand is commonly used as it is clean and free from impurities.

• Manufactured sand can also be used, providing consistency in grading.

• The sand should be well-graded to ensure a smooth application.

• Avoid using coarse sand as it can lead to a r...read more
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Q10. No of bricks required for 1q m Wall
Ans. 
Calculating the number of bricks for a 1 square meter wall involves considering brick size and mortar thickness.
• Standard brick size is typically 190mm x 90mm x 90mm.

• Assuming mortar thickness of 10mm, the effective size becomes 200mm x 100mm.

• Area of one brick with mortar = 0.2m x 0.1m = 0.02 sq.m.

• Number of bricks per square meter = 1 sq.m. / 0.02 sq.m. = 50 bricks.

• For a wall of 1 sq.m., approximately 50 bricks are neede...read more
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Q1. What is the process for installing solar panels, and what are the methods to test their functionality?
Ans. 
The process for installing solar panels involves site assessment, mounting the panels, connecting to the electrical system, and testing functionality.
• Site assessment to determine optimal location for maximum sunlight exposure

• Mounting the panels securely on the roof or ground

• Connecting the panels to the electrical system using inverters and wiring

• Testing functionality through performance monitoring and inspection
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Q2. How much type quality test in solar system
Ans. 
Various types of quality tests are conducted in solar systems to ensure efficiency and reliability.
• Quality tests for solar panels include performance testing, durability testing, and efficiency testing.

• Other quality tests may involve checking for defects in materials, connections, and overall construction.

• Regular maintenance and monitoring are also important quality control measures in solar systems.
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Q3. Installation teat
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Q4. Trench dept test
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Q5. Sand bedding test
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Diploma in electrical engineering

Q1. Self introduction
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Q2. About previous experience
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Q1. Self introduction
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Q2. Previous experience & domain related
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