Napino Auto & Electronics Interview Questions and Answers

Lap length of steel in tension zone is 50 times the diameter of the bar, while in compression zone it is 40 times.

• Lap length is the length of overlap between two bars in a reinforced concrete structure.

• In tension zone, the lap length is longer to ensure proper transfer of stress from one bar to another.

• In compression zone, the lap length is shorter as the bars are not subjected to as much stress.

• For example, if the diameter of the bar is 10mm, the lap length in tension zone w...read more

The test of fine aggregate is conducted to determine its quality and suitability for use in construction.

• The test of fine aggregate includes tests for grading, particle shape, specific gravity, water absorption, and moisture content.

• Grading test determines the particle size distribution of the aggregate.

• Particle shape test assesses the shape and texture of the particles.

• Specific gravity test measures the density of the aggregate compared to the density of water.

• Water absorpti...read more

Tests conducted on aggregates to determine their quality and suitability for use in construction.

• Gradation test to determine particle size distribution

• Abrasion test to determine resistance to wear and tear

• Impact test to determine toughness and resistance to impact

• Soundness test to determine resistance to weathering

• Specific gravity and water absorption test to determine density and porosity

Workability of concrete refers to its ease of mixing, placing, and compacting.

• Workability is affected by factors such as water-cement ratio, aggregate size and shape, and admixtures.

• Concrete with good workability is easier to handle and results in a smoother finish.

• Workability can be measured using tests such as slump test, flow test, and compacting factor test.

• Low workability can lead to problems such as segregation and honeycombing.

• Workability requirements vary depending on...read more

The process of tiles laying involves preparation of surface, marking layout, applying adhesive, laying tiles and grouting.

• Surface preparation involves cleaning and leveling the surface.

• Layout is marked using chalk lines or laser levels.

• Adhesive is applied using a notched trowel.

• Tiles are laid starting from the center and working outwards.

• Grouting is done after the adhesive has dried.

• Different types of tiles require different laying techniques.

• Tiles should be allowed to set fo...read more

Internal painting process involves surface preparation, primer application, and topcoat application.

• Surface preparation involves cleaning, sanding, and filling any cracks or holes.

• Primer application helps to improve adhesion and durability of the paint.

• Topcoat application is done after the primer has dried and provides the final color and finish.

• The type of paint and application method used depends on the surface being painted and the desired outcome.

• Proper ventilation and sa...read more

Internal plaster is the process of applying a layer of plaster on the interior walls and ceilings of a building.

• The surface to be plastered should be clean and free from dust and debris.

• A mixture of cement, sand, and water is prepared in the ratio of 1:4:5.

• The mixture is then applied to the surface using a trowel and leveled.

• The plaster is left to dry for a few days before it is painted or finished with a decorative coating.

• The thickness of the plaster layer should be between...read more