10+ Amazon Interview Questions and Answers

Answering questions related to setting up a quality lab and concrete mix design.

• To setup a quality lab, I would start by identifying the necessary equipment and tools required for testing and analysis.

• I would ensure that the lab is properly equipped with instruments like compression testing machine, sieve shaker, weighing balance, etc.

• For concrete mix design, the formula typically includes the proportions of cement, aggregates, water, and admixtures.

• The process of concrete mi...read more

FDD field dry density test is a method to determine the density of soil in the field.

• FDD stands for Field Dry Density.

• It is a test conducted on soil to measure its density.

• The test involves extracting a soil sample from the field and determining its dry weight and volume.

• The dry density is calculated by dividing the dry weight of the soil sample by its volume.

• This test helps in assessing the compaction and quality of soil for construction purposes.

A work permit is a written authorization that specifies the work to be done and the precautions to be taken before work can begin. ISO stands for International Organization for Standardization. Hira is a Hazard Identification and Risk Assessment process. Safety net is a fall protection system used in construction.

• Work permit is a written document that authorizes specific work to be done in a safe manner

• It outlines the precautions and safety measures to be taken before work ca...read more

The slump in column concreting should be between 150-175 mm.

• The slump should be measured before pouring the concrete.

• The slump should be consistent throughout the column.

• The slump should not exceed 175 mm to avoid segregation.

• The slump should not be less than 150 mm to ensure proper compaction.

• The slump can be adjusted by adding water or admixtures.

• The slump test should be performed according to ASTM standards.

Types of plaster include lime plaster, cement plaster, and gypsum plaster. Internal plaster is typically 12-15mm thick, while external plaster is 20mm thick. Gypsum plaster is usually 2-3mm thick. Waterproofing involves applying a waterproofing membrane or coating to prevent water penetration.

• Types of plaster: lime plaster, cement plaster, gypsum plaster

• Internal plaster thickness: 12-15mm

• External plaster thickness: 20mm

• Gypsum plaster thickness: 2-3mm

• Waterproofing process: app...read more

Slump in column concreting 90 to 100 mm

• Slump refers to the consistency of the concrete mix

• A slump of 90 to 100 mm indicates a very wet and unstable mix

• This can lead to issues with the structural integrity of the column

• Possible causes include incorrect water-cement ratio or improper mixing

• Solutions may include adjusting the mix proportions or using additives to improve stability

Cube casting and testing is a method to determine the compressive strength of concrete.

• Cubes are casted from a sample of fresh concrete

• The cubes are cured for a specific period of time

• The cubes are then tested for compressive strength

• The number of cubes to be casted depends on the project specifications

• Typically, 3 to 5 cubes are casted for every 50 cubic meters of concrete

Types of tiles include ceramic, porcelain, glass, and natural stone. Sizes vary from small mosaic tiles to large format tiles. Companies like Johnson Tiles, Kajaria, and Somany are popular choices.

• Types of tiles: ceramic, porcelain, glass, natural stone

• Sizes of tiles: small mosaic to large format

• Companies: Johnson Tiles, Kajaria, Somany

Calculating BBS and quantity takeoff

• Calculate the Bar Bending Schedule (BBS) by determining the quantity of reinforcement bars required for a project

• Consider the drawings, specifications, and structural requirements to accurately calculate the BBS

• Use software tools like Excel, AutoCAD, or specialized estimation software for efficient calculations

• Ensure accuracy in measurements and calculations to avoid material wastage or shortage

• Example: Calculate the BBS for a reinforced co...read more

Building materials have varying densities depending on their composition.

• Density is the mass per unit volume of a material.

• Common building materials and their densities include concrete (2.4 g/cm³), brick (1.9-2.2 g/cm³), and wood (0.5-0.8 g/cm³).

• Density affects the strength and durability of a structure, as well as its weight and cost.