Quality Assurance Quality Control Engineer Interview Questions and Answers for Freshers

Workability refers to the ease of handling and placing concrete, while durability refers to its ability to withstand environmental and service conditions.

• Workability is influenced by factors such as water content, aggregate size, and admixtures.

• Workable concrete can be easily mixed, transported, and placed without segregation or excessive bleeding.

• Durability is affected by factors like the water-cement ratio, cement content, and curing conditions.

• Durable concrete can resist d...read more

The characteristic strength of concrete is influenced by the water-cement ratio.

• The water-cement ratio is the ratio of the weight of water to the weight of cement used in the concrete mix.

• A lower water-cement ratio generally results in higher characteristic strength.

• A higher water-cement ratio can lead to lower characteristic strength and reduced durability.

• The water-cement ratio affects the hydration process and the overall density and strength of the concrete.

• For example, a...read more

The density of DI, MS, and HDPE pipes varies depending on their composition and manufacturing process.

• Density is a measure of mass per unit volume.

• DI (Ductile Iron) pipes have a density of approximately 7.2 g/cm³.

• MS (Mild Steel) pipes have a density of around 7.85 g/cm³.

• HDPE (High-Density Polyethylene) pipes have a density ranging from 0.93 to 0.97 g/cm³.

• The density of pipes is an important factor in determining their strength and suitability for different applications.

The pressure range of DI and HDPE pipes varies depending on their size and application.

• The pressure range of DI (Ductile Iron) pipes typically ranges from 150 psi to 350 psi.

• HDPE (High-Density Polyethylene) pipes have a pressure range of 100 psi to 300 psi.

• The pressure rating of pipes also depends on their diameter and wall thickness.

• For example, a 4-inch DI pipe with a wall thickness of 0.25 inches may have a pressure rating of 250 psi.

• It is important to consult the manufact...read more

Vernier list count is a method used in quality control to track and count the number of items in a list.

• Vernier list count is a technique used to accurately count items in a list or inventory.

• It involves using a vernier scale or caliper to measure and count the items with precision.

• This method is commonly used in manufacturing and quality control processes to ensure accurate inventory management.

• For example, in a production line, a QA engineer may use vernier list count to ve...read more

The least count of a vernier caliper is the smallest measurement that can be read on the scale.

• The least count is determined by the number of divisions on the main scale and the vernier scale.

• It is calculated by dividing the smallest division on the main scale by the number of divisions on the vernier scale.

• For example, if the smallest division on the main scale is 0.1 mm and the vernier scale has 10 divisions, the least count would be 0.01 mm.

• The least count represents the a...read more