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201.

The preliminary test is always conducted in the field.

Agree

Disagree

202.

In preliminary test, the concrete is placed in the mould in

A.	two	B.	three
C.	four	D.	five

203.

Each layer of concrete placed in the mould, in preliminary test, is compacted 25 times with a 20 mm diameter rod and 60 cm in length

Right

Wrong

204.

The preliminary test should be repeated if the difference of compressive strength of three test specimens exceeds

A.	0.5 N / mm2	B.	1 N / mm2
C.	1.5 N / mm2	D.	2 N / mm2

205.

The mass concrete in piers and abutments, the grade of concrete mix used, is

A.	1 ; 1 : 2	B.	1 ; 1.5 : 3
C.	1 ; 2 : 4	D.	1 ; 3 : 6

206.

In performing the works test

A.	the mould for test specimen should be made of non-absorbent material	B.	the mould should be constructed in such a way that there is leakage of water from test specimen during moulding
C.	the base plate of the mould should be of non-absorbent material	D.	all of the above

207.

For highly loaded columns, the concrete mix used is of proportion

A.	1 ; 1 : 2	B.	1 ; 1.5 : 3
C.	1 ; 2 : 4	D.	1 ; 3 : 6

208.

If the proportions of different ingredients (cement, sand and aggregate) are in the ratio of 1 : 2 : 4, then the grade of concrete is

A.	M 10	B.	M 15
C.	M 20	D.	M 25

209.

If 30% excess water is added, the strength of concrete is reduced by

A.	30%	B.	40%
C.	50%	D.	60%

210.

The finer the sand, greater is the bulkage.

Correct

Incorrect