Estimating and Costing
The unit of measurement is per quintal for the following:

Collapsible gates with rails
M.S. reinforcement of R.C.C. works
Rolling shutters
Expanded metal wire netting

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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
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
It is provided a cleaning eye at the top of the trap

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Estimating and Costing
While estimating a reinforced cement structure, the omitted cover of concrete is assumed

All of these
For reinforcing longitudinal bar in a beam 25 mm minimum or diameter of the largest bar which is more
At the end of reinforcing bar, not less than 25 mm or twice the diameter of the bar
In thin slabs, 12 mm minimum or diameter of the bar whichever is more

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