1. Multiple Choices. (2'x10-20 pts) 1) In a mortar, the binding material is Acement C.water 2) For ensuring quality of concrete, use A.single sized aggegates B.two sized aggregate (C)graded aggregates D.coarse aggregates. B.sand D.gravel 3) Separation of coarse aggregates from mortar during transportation, is known A.bleeding B.creeping segregation D.shrinkage E. none of these. 4) You are asked to construct a massive dam, the type of cement you will use, is A.ordinary Portland cement B.rapid hardening cement C.low heat cement (D.blast furnace slag cement E. white cement. 5) Workability of concrete for a given water content is good if the aggregates, are A rounded aggregate Birregular aggregate C.angular aggregate D.flaky aggregates. 6) Age of a tree may be ascertained by A.radius of its stem B.circumference of its stem C.number of branches Dnumber of annual rings.