Solve all questions. concrete technology material Q1 /Choose the correct answer.1- High permeability of concrete in field practice is due to . .a) Microcracking of interfacial transition zone. b) Adhesion resistance c) permeability ofaggregate d) not all of them2- The slump test is used for measurement the. .a- compressive strength b- segregation3- Compressive strength failure occurs through a combination of...a) Splitting fracture b) shear fracture c) shear and splitting. d) not all of them4- Concrete vibration reducinga) Air entraining voids b) air entrapped voids c) air capillary voids d) air gel voids5- The modulus of rupture is used for measurement the...a) Compressive strength b) tensile strength c) bond strength d) segregation6-The presence of chlorides in concrete containing embedded steel can lead to itsa- segregation b- volumetric change c- corrosion d- bleeding7- Accelerating admixtures can be used in . .a) Cold weather b) hot weather8- Surface wear isa) Chemical deterioration. b) Physical deterioration9- Map cracking of concrete is because of . .a) Frost Action b) Sulfate Attack c) Alkali-Aggregate Reaction d) surface wear10).. is a some of the water in the mix tends to rise to the surface of concrete.a) Segregation b) Revibration c) plastic settlement d) bleeding11) Strength and elasticity of aggregate depend on..a) Rock composition b) texture12- A sound aggregate is able to resist. .a) Volume changes in aggregate b) bond of aggregate c) strength of aggregate d) all ofthem.c- bleedingd- workability........c) normal weatherd) not all of themc) all of themd) not all of themc) microstructured) all of them13) Plastic shrinkage is caused by .a) Surface wear b) surface tension forces c) Sulfate Attack d) Alkali-AggregateReaction14), More severe attack on concrete is.. .a) Sodium sulfate b) potassium sulfates c) magnesium sulfate d) Ammonium sulfate15) Increased resistance to the action of freezing and thawing isa) Water reducing admixtures b) Set Retarding admixtures c) Superplasticising d) Air-entraining admixtures

2. The slump test is used for the measurement of workability. Answer:- d Explaination:- The concrete…

2- The slump test is used for measurement the... a- compressive strength 3- Compressive strength failure occurs through a combination of.. a) Splitting fracture b) shear fracture c) shear and splitting. d) not all of them 4- Concrete vibration reducing a) Air entraining voids b) air entrapped voids c) air capillary voids d) air gel voids 5- The modulus of rupture is used for measurement the... a) Compressive strength b) tensile strength c) bond strength d) segregation 6-The presence of chlorides in concrete containing embedded steel can lead to its. a- segregation b- volumetric change 7- Accelerating admixtures can be used in .. . a) Cold weather b) hot weather b- segregation c- bleeding d- workability C- corrosion d- bleeding c) normal weather d) not all of them