D49 QUIZ OF THE DAY

Which test is used to determine the load-bearing capacity of soil?

• CBR Test
• Impact Test
• Shape Test
• Abrasion Test

Answer explanation

CBR (California Bearing Ratio) test determines the load-bearing capacity of soil.

In Unified Soil Classification, what symbol represents clay?

• G
• S
• C
• M

Answer explanation

In Unified Soil Classification, C represents Clay.

What is the function of a prime coat in bituminous road construction?

• Provides final surface sealing
• Binds dust and loose particles
• Ensures bond between old and new pavement
• Introduces bitumen into road after placing metal

Answer explanation

Prime coat is applied to bind dust and loose particles on untreated surfaces.

Which type of bitumen is most suitable for maintenance work during rainy season?

• Tar
• Bitumen Emulsion
• Slow Curing Cutback
• Medium Curing Cutback

Answer explanation

Bitumen Emulsion is suitable for maintenance work in wet weather.

Assertion (A): Cut back bitumen can be applied at lower temperatures. Reason (R): Cut back bitumen contains volatile solvents that evaporate after application.

• Both A and R are true and R is the correct explanation of A
• Both A and R are true but R is not the correct explanation of A
• A is true but R is false
• A is false but R is true

Answer explanation

The volatile solvents in cutback bitumen reduce viscosity, allowing lower temperature application.

Which soil classification system is also known as HRB classification?

• Unified Soil Classification
• AASHTO Soil Classification
• Textural Classification
• Indian Standard Soil Classification

Answer explanation

AASHTO Soil Classification is also called HRB classification.

What is the purpose of a tack coat in road construction?

• Improve skid resistance
• Ensure bond between old and new pavement
• Seal the top surface against water penetration
• Bind dust and loose particles

Answer explanation

Tack coat is applied to ensure bonding between old and new pavement layers.

Which type of aggregate shape is considered the best for road construction?

• Rounded
• Angular
• Flaky
• Elongated

Answer explanation

Angular aggregates provide better interlocking and strength.

Which type of bitumen is prepared by mixing molten bitumen with hot water and emulsifying agents?

• Cutback Bitumen
• Bitumen Emulsion
• Tar
• Asphalt

Answer explanation

Bitumen Emulsion is a liquid product formed by mixing molten bitumen with hot water and emulsifying agents.

Which test is used to measure the softening point of bitumen?

• Penetration Test
• Ring and Ball Test
• Ductility Test
• Flash Point Test

Answer explanation

The Ring and Ball test determines the softening point of bitumen.