Plaster Maths: Multiple Layers and Separate Product Yields

Plaster Maths: Multiple Layers and Separate Product Yields

Original quantitative topic practice in English. All 24 questions are included in a shuffled order. Each question supplies its own data and model assumptions; use only those assumptions. Choose one answer. Practice target: 20/24, not an official examination pass mark. Keep full intermediate precision. These exercises cover the calculation scope in the title; they do not constitute a full Red Seal examination, trade qualification, site design or operating specification.
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A wall field has gross area 80 m² and excluded openings 8 m². A base coat is 8 mm with supplied consumption 1.2 kg per m² per mm. A finish coat is 2 mm with consumption 0.9 kg per m² per mm. Add 8% reserve separately to each product. Base bags contain 25 kg; finish bags 20 kg. These are supplied product assumptions. Calculate the combined purchased mass in kilograms. Keep intermediate values unrounded; round the final answer to 4 decimal places if needed.