D57 CHECK YOUR LEVEL

Statement 1: Ridge canals are constructed along the highest natural ground. Statement 2: Ridge canals help in irrigating both sides and reduce the number of cross-drainage works. Which of the following is correct?

• Only Statement 1 is correct
• Only Statement 2 is correct
• Both statements are correct
• Both statements are incorrect

Answer explanation

Ridge canals are constructed along natural ridges and can irrigate both sides with fewer cross-drainage works.

Statement 1: Tricalcium silicate (C3S) contributes to early strength of cement. Statement 2: Di-calcium silicate (C2S) provides strength in the first few days of hydration.

• Only Statement 1 is correct
• Only Statement 2 is correct
• Both statements are correct
• Both statements are incorrect

Answer explanation

C3S provides early strength while C2S contributes to strength at later stages; hence Statement 2 is incorrect.

Which component in AutoCAD helps to align the crosshair cursor precisely to geometrical points?

• Ortho
• Grid
• Snap
• Object Snap (Osnap)

Answer explanation

Object Snap allows precise selection of key geometric points like endpoints and midpoints in AutoCAD.

Which compound in cement is primarily responsible for the heat of hydration in the first 24 hours?

• C3A
• C3S
• C2S
• C4AF

Answer explanation

C3A reacts quickly and generates the highest heat of hydration, especially in the first 24 hours.

In theodolite, the horizontal axis is also referred to as:

• Line of collimation
• Trunnion axis
• Axis of bubble tube
• Altitude axis

Answer explanation

The horizontal axis in a theodolite is called the trunnion axis and supports the telescope.

Which AutoCAD command restores the last deleted object?

• UNDO
• OOPS
• REDO
• REGEN

Answer explanation

OOPS command restores the last deleted object unlike UNDO which reverses the last command.

Which survey is done to measure fluctuations of ocean tides and depth of water?

• City Survey
• Topographical Survey
• Hydrographical Survey
• Cadastral Survey

Answer explanation

Hydrographical survey is used to measure depths, tides, and underwater features in seas and rivers.

Which estimation type is required when additional works are added to the original sanctioned work?

• Revised Estimate
• Supplementary Estimate
• Preliminary Estimate
• Detailed Estimate

Answer explanation

Supplementary estimates are prepared when additional items need to be added to an existing sanctioned estimate.

Which canal outlet type has discharge independent of head in parent and field canal?

• Non-modular
• Modular
• Semi-modular
• Pipe outlet

Answer explanation

Modular outlets have discharge independent of both parent and field canal heads, ensuring constant flow.

The vertical circle in a theodolite is attached rigidly to which part?

• Upper Plate
• Telescope
• Tripod
• Shifting head

Answer explanation

Vertical circle is directly attached to the telescope and moves with it in vertical motion.