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211.

The concrete in which preliminary tests are performed for designing the mix is called

A.	rich concrete	B.	controlled concrete
C.	lean concrete	D.	ordinary concrete

212.

The maximum quantity of aggregate per 50 kg of cement should not exceed

A.	100 kg	B.	200 kg
C.	350 kg	D.	450 kg

213.

The minimum quantity of cement to be used in controlled concrete is specified as

A.	120 kg / cm3	B.	160 kg / cm3
C.	220 kg / cm3	D.	280 kg / cm3

214.

The concrete in which no preliminary tests are performed for designing the mix is called

A.	rich concrete	B.	controlled concrete
C.	lean concrete	D.	ordinary concrete

215.

The ordinary concrete is no used for

A.	M 10	B.	M 20
C.	M 25	D.	M 40

216.

The controlled concrete is used for

A.	one grade of concrete mix	B.	three grades of concrete mix
C.	five grades of concrete mix	D.	all the seven grades of concrete mix

217.

The water used for ordinary concrete is equal to 5% by weight of aggregate plus

A.	10%	B.	20%
C.	30%	D.	40%

218.

For reinforced cement concrete lintels and slabs, the nominal size of coarse aggregate should not exceed.

A.	10 mm	B.	15 mm
C.	20 mm	D.	40 mm

219.

Which of following proportion of different ingredient of concrete mix confirm to the arbitrary mothod of mixing?

A.	1 ; 2 ; 5	B.	1 ; 3 : 7
C.	1 : 4 ; 8	D.	1 : 5 ; 9

220.

The factor which effect the design of concrete mix is

A.	fineness modulus	B.	water-cement ratio
C.	slump	D.	all of these