Which of the following operating features do displacement pumps bear if they are working under no-cavitation condition?() (1) output is almost directly proportional to speed (2) they are self-priming (3) they will develop a discharged pressure equal to the resistance to be overcome, irrespective of speed
- A(1)and(2)
- B(2)and(3)
- C(1)and(3)
- D(1),(2)and(3)