Perkins Test Engineer Interview Questions and Answers

The standard MDD (Maximum Dry Density) of subgrade soil varies depending on the specific project requirements and soil characteristics.

• The standard MDD of subgrade soil is determined through laboratory tests.

• It is influenced by factors such as soil type, compaction method, moisture content, and compaction effort.

• Different soil types have different standard MDD values.

• For example, the standard MDD of a sandy soil may be...read more

TCS stands for Tata Consultancy Services.

• TCS is an Indian multinational IT services and consulting company.

• It is one of the largest IT service providers in the world.

• TCS offers a wide range of services including software development, infrastructure management, and consulting.

• The company has a strong presence in the highway engineering sector, providing technology solutions for transportation and infrastructure projects...read more

The quantity of soil in embankment or subgrade can be determined using the method of average end area.

• The method of average end area involves taking cross-sectional measurements at regular intervals along the embankment or subgrade.

• The cross-sectional measurements are used to calculate the area of each section.

• The average area is then multiplied by the length of the embankment or subgrade to determine the volume of soi...read more

The test to determine FDD of soil is called the Falling Head Permeability Test.

• Falling Head Permeability Test is used to determine the coefficient of permeability of soil.

• It involves measuring the time taken for water to flow through a soil sample under a constant head.

• The test is conducted using a permeameter, which consists of a cylindrical tube with a soil sample and a falling head of water.

• The coefficient of permea...read more

IRC recommends 8-10 passes of vibro roller for full compaction.

• IRC (Indian Road Congress) recommends 8-10 passes of vibro roller for full compaction.

• The number of passes may vary depending on factors such as soil type, moisture content, and thickness of the layer.

• In some cases, additional passes may be required to achieve the desired level of compaction.

• It is important to conduct regular tests to ensure that the desire...read more

The question is asking about the number of passes of different types of vibro rollers for highway construction.

• 6 passes of vibro roller 1P

• 6 passes of vibro roller 1MV

• 6 passes of vibro roller 1V

• 6 passes of vibro roller 2P