$\backslash$table$[[,\backslash$table$[[($a$)$ List various problems that concrete structures may encounter during its service life.$],[($b$)$ Explain briefly the formation of Portland cement. Name the oxide composition of Portland cement.$],[($c$)$ Describe briefly the microstructure of hydrated cement paste.$]]],[2,\backslash$table$[[($a$)$ How is fineness of cement measured? How does fineness affect strength of concrete?$],[($b$)$ Discuss the different types of cement to be used in different conditions.$]]],[3,\backslash$table$[[($a$)$ Draw stress$-$strain graph of high strength concrete and explain mode of its fracture.$],[($b$)$ Write about the use of maximum size of coarse aggregate as prescribed by the IS code. State the reasons of limiting maximum size.$],[($c$)$ Write about the effect of presence of clay, silt and other organic impurities present in aggregates.$]]],[4,\backslash$table$[[($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$)$ What do you mean by slump loss? What are the primary causes of slump loss in concrete and what are its preventive measures?$]]],[5,\backslash$table$[[($a$)$ Under what conditions does corrosion of rebar take place?$],[$How is corrosion tested in laboratory?$],[($b$)$ Under what circumstances would you recommend the following workability tests: slump, Vebe, compacting factor and slump flow test?$]]],[6,\backslash$table$[[($a$)$ State the reasons for occurrence of settlement cracks. Comment on the possible location of settlement cracks.$],[($b$)$ What do you mean by chemical admixtures? What are the various types of chemical admixtures used in concrete?$],[($c$)$ Define high volume fly ash concrete $($HVFA$).]]],[7,\backslash$table$[[($a$)$ Describe the various types of mineral admixtures used in concrete.$],[($b$)$ Define water cement ratio and water binder ratio. Why and how does water cement ratio affect compressive strength of concrete?$]]],[8,($a$)$ How will you assess presence of cracks on a flat concrete surfice using USPV tester?$]]$