Sterling Indo Tech Consultants Senior Project Engineer Interview Questions and Answers

Flexible pavements and rigid pavements are two types of roads.

• Flexible pavements have an embankment thickness of 3m and large size soil particles.

• Rigid pavements are made of concrete or asphalt and have a rigid structure.

• Flexible pavements are more suitable for areas with high traffic loads and varying soil conditions.

• Rigid pavements are more durable and require less maintenance compared to flexible pavements.

• Examples ...read more

Discussion on DLC mix using M15 grade concrete and 12:1 aggregate cement ratio.

• Minimum cement content is 120 kg per cum if flyash is more than 20%.

• 5 samples of cube tested for 7 days with 10MPa compressive strength.

• DLC mix is homogeneous and uniform in pre mix batching plant.

• DLC is carried from one place to another place covered by tarpoline.

• One sample after 7 days showed 7.5 Mpa compressive strength.

The question is unclear and lacks context.

• The question needs to be rephrased for clarity.

• More information is needed to provide a proper answer.

• It is unclear what the purpose of the DLC surfaces is.

• The sub base surface compaction percentages are not relevant to the question.

• The question may be related to civil engineering or construction.

The question pertains to the expected stress and restrained movement on an expansion joint with dowel bar load transfer.

• Total thickness of 300mm with M40 grade concrete and 31.5mm aggregate size.

• Texture strength of cement concrete is 4.5 Mpa and compressive strength after 28 days curing is 40Mpa.

• Expansion joint thickness is 25mm with dowel bar load transfer to one slab to another slab.

• Dowel bar is 32mm dia, 500mm lengt...read more

The question is about the process of laying PQC mix on DLC surface using a pre-mix batching plant and electromagnetic paver sensor machine.

• Process of laying PQC mix on DLC surface

• Use of pre-mix batching plant and electromagnetic paver sensor machine

• Importance of proper compaction and blending

• Tolerance and effect on workability

The interviewer is asking about CBR valve and subgrade for road construction.

• CBR valve is generally between 3 to 15% for road construction

• Clay content should be less than 8%

• Sand content should be between 15% to 35%

• Gravel content should be greater than 25%

• CBR division of state highway develops CBR

• Subgrade and aggregate should meet the CBR valve requirements