quiz 2 basics of construction materials

aggregates means a mass of crushed ................ , .................... and .................. that predominantly composed of individual particles.

• rock

• sand

• stone

• gravel

aggregates is an essential ingredient in OPC production.

how much percentage of aggregates volume contributed in this cement mx?

• 92-96

• 79-85%

• 75-85%

• 60-75%

Usually, what is the aggregates weight contributed in the POC mix?

• 60-75%

• 79-85%

• 75-85%

• 92-96%

rock quarries is one of the natural source of aggregates other than ............. and .................. .

• slate

• limestone quarries

• river run deposit

• gravel pits

in general, aggregates are use as

• binder in cement mortar

• underlying pavement walkway

• underlying material for buildings' foundation

• Portland cement ingredient

choose THREE (3) benefits of aggregates

• provide a drainage layer

• aesthetic value

• protect structure against frost damage

• structure stability

below are aggregates particles shapes, except

• flaky

• rounded

• angular

• sharpie

a GOOD TIMBER must have principle characteristic. this includes ... (choose 3 correct answer)

• narrow annual ring

• light weight

• no wooliness at the cutting surface

• dark color

what is the reason that make the wood so important as civil engineering material. (choose 3 answer)

• exclusive

• easy to used

• durability

• availability

Trees can be classified based on reasons stated below, EXCEPT?

• direction of wood cutting

• color

• strength

• weight