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11 . The initial setting time of lime-pozzolana, is
A. 30 minutes
B. 60 minutes
C. 90 minutes
D. 120 minutes.

12 . The clay to be used for manufacturing bricks for a large project, is dugout and allowed to weather throughout
A. the monsoon
B. the winter
C. the summer
D. none of these.

13 . The rocks which are formed due to cooling of magma at a considerable depth from earth's surface are called
A. Plutonic rocks
B. Hypabyssal rocks
C. Volcanic rocks
D. Igneous rocks.

14 . Quartzite is a
A. metamorphic rock
B. argillaceous rock
C. calcareous rock
D. silicious rock.

15 . Sand stone is
A. sedimentary rock
B. metamorphic rock
C. igneous rock
D. volcanic rock.