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Civil Engineering Objective Questions { Concrete Technology }



106.  Ordinary concrete is not used for concrete grade
A. M 100
B. M 150
C.M 200
D. M 400

107.  For preparing ordinary concrete, the quantity of water used, is
A. 5% by weight of aggregates plus 20% of weight of cement
B. 10% by weight of aggregates plus 10% of weight of cement
C. 5% by weight of aggregates plus 30% of weight of cement
D. 30% by weight of aggregates plus 10% of weight of cement

108. The following proportion of the ingredients of concrete mix, is not in conformation to arbitrary method of proportioning
A. 1 : 1 : 2
B. 1 : 2 : 4
C. 1 : 3 : 6
D. 1 : 4 : 10

109. If X, Y and Z are the fineness modulli of coarse, fine and combined aggregates, the percentage (P) of fine aggregates to combined aggregates, is
A. P =x 100
B. P = x 100
C. P = -Y x 100
D. P= x 100

110.  If P , Y and Z are the weights of cement, fine aggregates and coarse aggregates respetively and WIG is the water cement ratio, the minimum quantity of water to be added to first batch, is obtained by the equation
A. 01P + 03Y + 012 = WIG x
B. 03P + 01Y + 001Z = WIG x P
C. 04P + 02Y + 001Z = W/C x P
D. 05P + 03Y + 001Z = WIG x P

111.  If 50 kg of fine aggregates and 100 kg of coarse agregates are mixed in a concrete whose water cement ratio is 06, the weight of water required for harsh mix, is
A. 8 kg
B. 10 kg
C. 12 kg
D. 14 kg

112.  In the method of voids for determination of the quantity of cement paste, it is assumed that
A. Voids in coarse aggregates are filled by fine aggregates
B. Voids in fine aggregates are filled by the cement paste
C. Volume of fine aggregates is equal to total voids in coarse aggregates plus 10% extra
D. All the above

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