Which one of following statements associated with groynes : 1. Hydraulic behaviour of a system of groynes is influenced by the characteristics of particles that constitute the littoral drift. 2. Groyne is constructed approximately parallel to shore. Which of the statements given above is/are correct ?
Reinforced concrete door and window frames can be compacted using : 1. needle vibrator 2. plate vibrator 3. form vibrator 4. tapping The correct sequence of these equipment in order of preference (from the best to the worst) is