Estimating and Costing
The measurement is made in square metre in case of

Hollow concrete block wall
Cement concrete in foundation
None of these
R.C.C. structure

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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
The water seal is less than that of ordinary traps
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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