Estimating and Costing
Pick up the excavation where measurements are made in square meters for payment.

Surface excavation up to 30 cm depths
Ordinary cuttings up to 1 m
Surface dressing up to 15 cm depths
Both (B) and (C)

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

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