Question

Which of the following type of vibrating unit used in a vibrator?

(a) Out-of balance weight type and Pulsating hydraulic type

(b) Piston hydraulic type

(c) None of the mentioned

(d) All of the mentioned

I have been asked this question in homework.

My question comes from Field Compaction Test in portion Compaction of Geotechnical Engineering I

Answer 1

Right option is (a) Out-of balance weight type and Pulsating hydraulic type

For explanation I would say: The vibrators consist of vibrating unit of either the out-balance weight type or a pulsating hydraulic type mounted on a screed, plate or roller.