Estimating and Costing
While preparing a detailed estimate

Dimension should be measured correct to 0.01 m
Area should be measured correct to 0.01 sqm
All of these
Volume should be measured correct to 0.01 cum

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

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
The water seal is less than that of ordinary traps

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