D60 FACE THE CHALLENGE

Which property of bitumen helps in providing an impermeable road surface?

• Adhesiveness
• Solubility
• Viscosity
• Impermeability

Answer explanation

Bitumen's impermeability helps prevent water penetration into roads.

Which gauge is used for finding the flakiness index of aggregates?

• Thickness gauge
• Length gauge
• Flakiness tester
• Diameter gauge

Answer explanation

Thickness gauge is used to measure particles thinner than 0.6 times average size.

Which polygon has exactly 9 sides?

• Nonagon
• Octagon
• Heptagon
• Decagon

Answer explanation

A nonagon has exactly 9 sides.

What is the standard size of a Johnson Table used in plane table surveying?

• 45x60 cm
• 30x60 cm
• 60x90 cm
• 60x75 cm

Answer explanation

Johnson tables are usually 60 x 75 cm in size for plane tabling.

What is the purpose of the breaking pin in a prismatic compass?

• Stops needle oscillation
• Lifts the tripod
• Holds sight vane
• Secures magnetic needle

Answer explanation

Breaking pin stops needle movement, enabling quick and stable readings.

What method is most suitable when radial distances are measured from a central station?

• Radiation
• Intersection
• Traversing
• Resection

Answer explanation

Radiation is used when all survey points are accessible from a central station.

In RCC footing, what is the minimum reinforcement for HYSD bars?

• 0.12% of gross area
• 0.15% of gross area
• 0.25% of gross area
• 0.10% of gross area

Answer explanation

Minimum reinforcement for HYSD bars in footings is 0.12% of gross area.

Which type of prism has two identical end faces connected by vertical edges?

• Cube
• Pyramid
• Cylinder
• Cone

Answer explanation

A prism has two identical end faces and vertical edges — a cuboid is an example.

Which level type has a compensating device for self-leveling?

• Dumpy level
• Tilting level
• Wye level
• Automatic level

Answer explanation

Automatic levels use compensator for self-leveling.

In which test is bitumen mixed with aggregate and heated up to 160°C?

• Affinity test
• Stripping value test
• Soundness test
• Softening test

Answer explanation

Stripping test identifies bitumen–aggregate bond by heating and mixing.