Which of the following statements is true:
(1) Reciprocating pumps are suitable for very high suction heads at a low flow rate.
(2) Reciprocating pumps are very tolerant to contamination and are suitable for pumping fluids containing solid particles.
(3) Reciprocating pump produce a very smooth linear flow without pulsations.
(4) Reciprocating pumps are not self-priming and require an external method of priming.