D34 CHECK YOUR LEVEL

Which type of soil is best suited for brick-making?

• Clayey soil
• Sandy soil
• Loamy soil
• Gravelly soil

Answer explanation

Clayey soil has fine particles and plasticity, making it most suitable for molding into bricks and firing.

Which of the following irrigation methods provides water directly to the root zone?

• Furrow irrigation
• Drip irrigation
• Sprinkler irrigation
• Check basin irrigation

Answer explanation

Drip irrigation delivers water directly to plant roots through emitters, ensuring minimal evaporation losses.

In compass surveying, the magnetic declination is the angle between:

• True meridian and grid meridian
• Magnetic meridian and true meridian
• Magnetic meridian and north pole
• True meridian and celestial north

Answer explanation

Magnetic declination is the angle between the true north and magnetic north, important in compass correction.

Which of the following is used to prevent the settlement of foundations on black cotton soil?

• Underpinning
• Well foundation
• Sand cushion
• Grouting

Answer explanation

Sand cushion below foundations in black cotton soils helps to reduce swell-shrink behavior and protect the structure.

What is the maximum permissible limit of silt in sand for plaster work as per IS standards?

• 2%
• 4%
• 6%
• 8%

Answer explanation

IS 1542 specifies that silt content in sand for plastering should not exceed 4% by weight.

Which part of a canal structure is provided to dispose surplus water?

• Head regulator
• Outlet
• Canal fall
• Escape

Answer explanation

Canal escapes are structures built to safely discharge excess water from canals into natural drains or rivers.

The maximum water-cement ratio for a mild exposure RCC work as per IS 456 is:

• 0.45
• 0.50
• 0.55
• 0.60

Answer explanation

As per IS 456:2000, for RCC work under mild exposure, the maximum water-cement ratio should not exceed 0.55.

Which IS code is used for load calculations on buildings?

• IS 875
• IS 456
• IS 800
• IS 962

Answer explanation

IS 875 deals with the code of practice for structural safety and loads including dead, live, snow, wind, and seismic.

The most commonly used preservative for timber is:

• Bitumen
• Tar
• Creosote oil
• Paint

Answer explanation

Creosote oil is widely used for timber preservation due to its penetration capacity and effectiveness against insects and decay.

Assertion (A): Bitumen is used in road construction. Reason (R): It provides water resistance and flexibility.

• 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

Bitumen’s flexibility and impermeability to water make it ideal for road surfacing. R explains A.