MCQOPTIONS
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				| 1. | 
                                    In the method of tube boring of soil investigation, the following is essential : | 
                            
| A. | a tube of about 2 metres length and 20 cm diameter with a cutting edge | 
| B. | a flap valve at the bottom of tube is provided to extract the soil sample | 
| C. | the tube is raised and lowered by 4 thick rope moving over a pulley suspended on a tripod stand | 
| D. | the tube is dropped to fall under gravity in side a metalic casing pipe which is driven as the depth of excavation proceeds. | 
| E. | all the above. | 
| Answer» F. | |