Estimating and Costing
The ground surface slopes 1 in 50 along a proposed railway embankment 150 m in length. The height of the embankment at zero chainage is 0.5 m, the width is 11 m and side slopes 2:1. If the falling gradient of the embankment is 1 in 150, the quantity of the earthwork calculated by Prismoidal formula, is

3250 m³
3275 m³
3300 m³
3225 m³

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Estimating and Costing
Pick up the incorrect statement regarding a master trap from the following:

The water seal is less than that of ordinary traps
The mica flap valve which opens inwards only, is fitted at the top of the inlet pipe
It is provided a cleaning eye at the top of the trap
It is provided in between the lower end of the house drain and the street sewer

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