$1$

$($a$)$ What do you mean by re$-$vibration and over$-$vibration?

$($b$)$ Under what circumstances are rehabilitation and retrofitting of structures adopted?

$($c$)$ In fiber reinforced concrete, what do you mean by balling effect?

$($a$)$ How does river shingle and crushed coarse aggregate affect strength? Does grading of sand affect strength and how?

$($b$)$ Which one is stronger: $15$ cm cube or $15$ cm cylinder and why?

$3$

$($a$)$ Draw stress$-$strain graph of high strength concrete and explain mode of its fracture.

$($b$)$ Explain the methods of curing in hot weather and cold weather.

$4$

$($a$)$ What size of coarse aggregate is recommended for mix design of mass concrete and why?

$($b$)$ During mix design concrete, why do we take target strength and not the characteristic strength?

$($c$)$ Draw probability density curve of compressive strength and show therein characteristic strength and target strength.

$5$

$($a$)$ Under what conditions does corrosion of rebar take place? How is corrosion tested in laboratory?

$($b$)$ What do mean by self$-$ healing of concrete? Is self healing of a column feasible using bacteria?

$($c$)$ How is carbonation of concrete tested at the site?

$6$

$($a$)$ How will you assess presence of cracks on a flat concrete surface using USPV tester?

$($b$)$ State advantages and disadvantages of ultrahigh performance of concrete.

$($c$)$ What do you mean by ballistic concrete?