Statistical based quality control for concrete is carried out for a highway project in which 37 concrete samples were tested randomly. The average strength was found to be 40 MPa with a square of deviation of 400 MPa². What is the standard deviation of the test samples?

Which of the following tests is used to check the soundness of cement?

In levelling, which of the following is an advantage of the rise and fall method over the height of instrument method?

The centre to centre distance between individual fasteners in a line, in the direction of load is called ____________

In the case of lap joint welds, the minimum lap should NOT be less than X times the thickness of the thinner part joined or 40 mm (whichever is more), where X isL

The rate of an item at the store godowns from public market at a given time is called the __________.

During the construction of a steel truss roof, which of the following statements are correct?
1. Steel truss transmits self-weight and roof loads vertically on the walls.
2. Spacing between steel trusses are usually between 10 feet to 15 feet.
3. Steel trusses use reduced dead load of building making structure unstable.

Select the correct option for the given statements.
Statement
1 : Consolidation is due to a reduction in the volume of air voids at a given water content.
Statement
2 : In compaction volume reduction is due to expulsion of pore water from voids.

Canal bed level – (thickness of culvert + depth of culvert) = Level of the floor of ____________.

As per IS 383 (1970), the grading limit percentage of fine aggregates in Zone II which are passing through a 4.75 mm IS sieve is _________.