archcom bldsci

Which of the following is not an ingredient of concrete?

• Sand

• Gravel

• Cement

• Water

• None of the above

What is the initial setting time of ordinary portland cement?

• 10 minutes

• 15 minutes

• 30 minutes

• 45 minutes

Which type of cement is used in retaining walls?

• Rapid hardening

• Sulphates resisting

• Pozzolanic

• None of the above

More water in the concrete mix makes concrete weaker.

• True

• False

Which class of concrete mix is used for suspended slabs?

• AA

• A

• B

• C

Machine mixed concrete may be used beyond 30 minutes.

• True

• False

Falsework is the temporary mold used to retain fluid concrete until it hardens.

• True

• False

Concrete elements are directly subjected to tensile loads.

• True

• False

Which of the following types of stone is metamorphic?

• Granite

• Limestone

• Sandstone

• Marble

• None of the above

Which of the following mortar for masonry units does not have lime?

• Pozzolanic Mortar

• Sticky Rice Mortar

• Egg White Mortar

• None of the above