Construction Planning and Management
The part of a derrick crane include (i) Mast (ii) Boom (iii) Bull wheel (iv) Jack which of these statements are correct?

(i), (iii) and (iv) are correct
(i), (ii) and (iii) are correct
(ii), (iii) and (iv) are correct
(i), (ii) and (iv) are correct

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Construction Planning and Management
Batching refers to

Weighing accurately, the quantity of each material for a job before mixing
Controlling the quantity of each material into each batch
Adjusting the water to be added in each batch according to the moisture content of the materials being mixed in the batch
Controlling the total quantity at each batch

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