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        | Engineering  :: Concrete Technology |  | 
       
        
	 
	
	 
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                |  | Which of the following statement is correct while compacting concrete with vibrators? |  
                | | [A]. | The vibrator should be inserted horizontally. | [B]. | The vibrator should not be immersed through a full depth of freshly laid concrete. |  | [C]. | The vibrator should not touch the form surface. | [D]. | all of the above | 
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