Building Construction
For constructing a terrazzo floor, Pick up the incorrect statement from the following:

A 32 mm thick layer of cement concrete (1 : 2 : 4) is laid on the base course and the surface is made smooth by trowelling
After final grinding is over, oxalic acid mixed with water is spread over and rubbed hard with soft material
Glass strips are driven into the layer according to the pattern required
A base course is prepared as in cement concrete flooring

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Building Construction
Grillage foundation

All listed here
Does not require deep cutting as the required base area with required pressure intensity is obtained at a shallow depth
Is light and economical
Is used to transfer heavy structural loads from steel columns to a soil having low bearing capacity

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Building Construction
Rotary drilling

Is not economical for holes of less than 10 cm
All listed here
Hinders the ground water observations and permeability test
Is not suitable for deposits containing very coarse gravel

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