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181.

For high degree of workability, the compaction factor is

A.	0.65	B.	0.75
C.	0.85	D.	0.95

182.

Workability of concrete mix having very low water-cement ratio should be obtained by

A.	flexural strength test	B.	slump test
C.	compaction factor test	D.	any one of these

183.

Vibrated concrete needs

less

high

184.

Concrete with higher compaction factor has less workability.

True

False

185.

The workability of concrete by slump test is expressed as

A.	minutes	B.	mm / h
C.	mm2 / h	D.	mm

186.

The slump test of concrete is used to mesure its

A.	consistency	B.	mobility
C.	homogeneity	D.	all of these

187.

The compaction factor is the ratio of weight of partially compacted concrete to the weight of fully compacted concrete.

Yes

188.

If the slump of concrete mix is 70 mm, its workability is considered to be

A.	very low	B.	low
C.	medium	D.	high

189.

A compaction factor of 0.88 indictes that the workability of concrete mix is

A.	very low	B.	low
C.	medium	D.	high

190.

The Vee-Bee test is suitable for concrete mixes of low and very low workabilities.

True

False