Estimating and Costing
The cross-sections for a highway is taken at

30 meters apart
All of these
Right angle to the centre line
Intermediate points having abrupt change in gradient

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

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