14.

15.

16.

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20.

Which of the following is a key ingredient in the preparation of high performance concrete?
(^) Silica fume (B) Volcanic ash
(C) Blast furnace slag (D) Pumice

The curved triangular space formed between the extrados and the horizontal line through the
crown is known as:

(^) Voussoir (B) Springer
(C) Arcade ൯൩) Spandril

As per the specification in IS 456:2000, the transverse reinforcement for torsion shall be :
(൧) rectangular open stirrups placed perpendicular to the axis of the member
(B) rectangular closed stirrups placed perpendicular to the axis of the member
(C) rectangular closed stirrups placed at 45° to the axis of the member
(D) rectangular open stirrups placed at 45° to the axis of the member

The development length required for a reinforcement bar of 12 mm diameter and grade
Fe415, at a section where design bond stress is 1.92 MPa:

(^) 353mm ൯) 438 mm
(C) 564mm (D) 648 mm

High strength concrete is necessary for prestressed concrete because it :
(A) has high resistance to shrinkage crack
൯) allows reduced cross section
(C) has high bearing strength
(D) allof the above

A double angle discontinuous strut consists of two identical angles placed back-to-back which
are tack bolted. Comparing the compressive strength of two cases, viz., (i) Angles placed on
opposite sides of the gusset plate (ii) Angles placed on the same sides of the gusset plate :

(ಹ). Case (i) greater than case (ii) (B) Case (i) less than case (ii)
(C) Case (i) equal to case (ii) (D) Can be any of the above

A soil stratum is 10 m thick with pervious stratum on top and bottom. Determine the time
required for 50% consolidation.

Given :

Coefficient of permeability = 10-7 cm/sec.

Coefficient of compression = 0.0003 cm2/gm.

Void ratio = 2

Time factor = 0.197.
(A) 950 days (B) 690 days
(C) 570 days (D) 450 days

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