Explain the difference between receiving hood and a push-pull hood. Which hood would be more suitable in the following case, and how would you install it to control this particular hazard: an automobile engine testing center produces a lot of carbon black particles from incomplete fuel combustion of the engines being tested. The workshop is such that the carbon black which is a moderately fine (not super-fine like maida) and sticky dust, gets accumulated in the air towards a corner of the workshop