Excess of alumina in brick earth makes the brick______________?

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Plywood is made by bonding together thin layers of wood in such a way that the angle between grains of any layer to grains of adjacent layers is_________________?

A. 0° B. 30° C. 45° D. 90°...

With increase in moisture content, the bulking of sand_______________?

A. increases B. decreases C. first increases to a certain maximum value and then decreases D. first decreases to a certain minimum value and then increases...

The basic purpose of a retarder in concrete is_____________?

A. to increase the initial setting time of cement paste in concrete B. to decrease the initial setting time of cement paste in concrete C. to render the concrete more water tight D. to improve the workability of concrete mix...

The most important tool in brick laying for lifting and spreading mortar and for forming joints is____________?

A. trowel B. square C. bolster D. scutch...

Couple close roof is suitable for maximum span of______________?

A. 2.5 m B. 3.5 m C. 4.5 m D. 5.5 m...