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

3275 m³
3225 m³
3300 m³
3250 m³

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Estimating and Costing
The assumption on which the trapezoidal formula for volumes is based, is

All listed here
The volume of the Prismoidal is over-estimated and hence a Prismoidal correction is applied
The end sections are parallel planes
The mid-area of a pyramid is half the average area of the ends

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

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
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

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