 
			 
			MCQOPTIONS
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				| 1. | In the wooded bulk-head, used for mucking in steep grade tunnels, | 
| A. | one opening is provided | 
| B. | two openings are provided | 
| C. | three openings are provided | 
| D. | no opening is provided. | 
| Answer» C. three openings are provided | |