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Concrete Technology



mcqs by everyone

The main object of compaction of concrete, is


Water cement ratio is generally expressed in volume of water required per


The operation of removing humps and hollows of uniform concrete surface, is known as


Pozzolanic properties exist in


Pick up the incorrect statement from thefollowing.
While performing preliminary test on concrete


To hydrate 500kg of cement full water needed, is


The bulk density of aggregates does not depend upon


If 50 kg of fine aggregates and 100 kg of coarse agregates are mixed in a concrete whose water cement ratio is 0.6, the weight of water required for harsh mix, is


An aggregate is said to be flaky, if its least dimension is less than


If P, Y and Z are the weights of cement, fine aggregates and coarse aggregates respetively and W/C is the water cement ratio, the minimum quantity of water to be added to first batch, is obtained by the equation


For construction of structures in sea water, the cement generally preferred to, is


M10 grade of concrete approximates


If the engineer-in-charge approves, the 10 cm cubes may be used for the work test of concrete provided maximum nominal size of aggregate, does not exceed


Water cement ratio is


Under normal conditions using an ordinary cement, the period of removal of the form work, is


Hydration of cement is due to chemical action of water with


To ensure constant moisture content in aggregates


The ratio of the length to breadth of a wooden float, is


In the method of voids for determination of the quantity of cement paste, it is assumed that


The cement becomes useless if its absorbed moisture content exceeds


Pozzolana cement is used with confidence for construction of


The type of aggregates of same nominal size, which contain less voids when compacted, are


Log Angles machine is used to test the aggregate for


The impurity of mixing water which affects the setting time and strength of concrete, is


'Ware house pack' of cement means


The mixture of different ingredients of cement, is burnt at


The datum temperature for maturity by Plowman, is


For preparing a test-specimen, it is necessary


The ratio of various ingredients
(cement, sand, aggregates) in concrete of grade M 200, is


A flaky aggregate is said to be elongated if its length is