CMT-PREFINAL-EXAM

Fine aggregates generally consist of natural Sand or crushed stone with most particles smaller than _________.

• 5 mm

• 10 mm

• 15 mm

• 20 mm

Coarse aggregates typically consist of gravels, crushed stone, or a combination of both, with particles predominantly __________ 5 mm (0.2 in.) and generally between 9.5 mm and 37.5 mm (3⁄8 in. and 1½ in.).

• smaller than

• larger than

• equal to

• NOTA

Classification of Aggregates according to Source:

• Natural

• Manufactured

• Recycled

• Marine Dredged

Classification of Aggregate according to Petrological Characteristic

• Igneous Rocks

• Sedimentary Rocks

• Metamorphic Rocks

• Natural

Classification of Aggregate according to Unit Weight

• Heavy Weight

• Light Heavy Weight

• Normal weight

• Feather Weight

Soaking Time for Specific Gravity and absorption of Aggregates

• 15 to 19 hrs

• 15 to 18 hrs

• 15 to 16 hrs

• 16 to 19 hrs

Apparatus needed for Specific gravity and absorption of coarse aggregate except:

• Wire Basket

• Pycnometer

• Watertight Tank

• Oven

Apparatus needed for Specific gravity and absorption of fine aggregate except:

• Conical Mold and Tamper

• Pycnometer

• Watertight Tank

• Oven

How many drops is needed for the Cone Test of Saturated Surface Dry condition for Fine Aggregate?

• 25

• 50

• 75

• 100

How many drops is needed for the Unit Weight Determination (Rodded) for Fine Aggregate?

• 25

• 50

• 75

• 100