Question: how to perform fdt test?
Answer: Make hole 15cm depth. [00:28], Remove loose sand. [01:13], Initial weight of sand cone bottle. [01:40], Put bottle on hole & release sand. [01:45], Weight of sand extract from hole. [01:59], Check moisture cont. Of sand by speedy moisture. [02:16], Final weight of bottle after sand fill in hole. [03:20], Test complete. [03:30]