ESTIMATION AND COSTING OF WIRING - Practice Mode

1) Which factor determines the size of wire used for industrial wiring?

Type of wiring distance Distance from source Line voltage Load current

Correct Answer: Load current

2) Which is the distance of saddles to be fixed from the centre of bends (or) couplings in metal circuit wiring?

60cm 50cm 30cm 15cm

Correct Answer: 30cm

3) Which is the alpha numberic rotation for apparatus AC 3 phase system?

A,B,C,N X,Y,Z,N U,V,W,N A,B,C,N

Correct Answer: U,V,W,N

4) Which is the minimum size of copper conductor used for power wiring in commercial wiring as per IE rule?

1 mm<sup>2</sup> 1.5 mm<sup>2</sup> 2.0 mm<sup>2</sup> 2.5 mm<sup>2</sup>

Correct Answer: 2.5 mm<sup>2</sup>

5) Which is the minimum size of PVC conduit used in government installations prescribed by CPWD?

20mm 16mm 19mm 32mm

Correct Answer: 19mm

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