A compaction factor of .85 for a cement concrete sample indicates ___________

Low workability

Good workability

Medium workability

Very good workability

Correct Answer : Low workability

Explanation : Roads vibrated by hand-operated machines. At the more workable end of this group, concrete may be manually compacted in roads using aggregate of rounded or irregular shape.

Recently Updated in Concrete Technology Questions

Which of the following compound is used for fine polishing?

Nitric oxide

Iron oxide

Silicon carbide

Aluminum oxide

Correct Answer : Option (D) : Aluminum oxide

Explanation : Powder form of aluminum oxide is used for fine polishing process. It is surface treatment process.

Maximum nominal size of aggregates to be used in concrete may be as large as possible within the limits prescribed by __________

IS 456-2010

IS 456-2000

IS 465-2000

IS 513-1999

Correct Answer : Option (B) : IS 456-2000

Explanation : Option can be eliminated because there is no such code. Maximum nominal size of aggregates to be used in concrete may be as large as possible within the limits prescribed by IS 456:2000.

Air contents should be _________ % by volume.

1-2

2-3

3-4

4-5

Correct Answer : Option (C) : 3-4

Explanation : This type of cement was first of all developed in U.S.A. It is recommended that air contents should be 03-04 % by volume.