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__________ vibrators are attached to the form work and the external centring of walls, column, etc.(a) Shutter vibrators(b) Surface vibrators(c) Internal vibrators(d) Immersion vibratorsI got this question by my college professor while I was bunking the class.My question is based upon Curing of Concrete in section Cement Concrete Construction of Construction & Building Materials

Answer»

Correct OPTION is (a) Shutter vibrators

The best I can explain: In Form or Shutter vibrators, the Vibrating action is conveyed to concrete through the formwork. A considerable ENERGY is absorbed by the formwork during TRANSMISSION of vibration. HENCE they are not GENERALLY used.



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