Which of the following statement is true for osmotic pumps?

Which of the following statement is true for osmotic pumps? Correct Answer The tube is made up of stainless steel

The innermost drug reservoir is contained in an impermeable polyester bag. The outermost rigid rate controlling semipermeable membrane. A rigid polymeric plug is used to form a leak-proof seal between the drug and the semipermeable housing. The tube is made up of stainless steel.
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Two centrifugal pumps P and R are available for use in a pipe flow system and their head-discharge characteristics are as follows. Pump P Pump R Discharge (cumecs) Head (m) Discharge (cumecs) Head (m) 0 40 0 45 0.12 35 0.14 40 0.2 28 0.24 35 0.3 18 0.3 28   The following statements (S1, S2, and S3) pertain to the head and discharge values during actual operation. Neglect losses in the system. Which of the following statements are correct? S1: When the two pumps P and R are connected in parallel, the discharge is 0.36 cumecs corresponding to a head of 35 m. S2: When the two pumps P and R are connected in parallel, the discharge is 0.36 cumecs corresponding to a head of 70 m. S3: When the two pumps P and R are connected in series, the discharge is 0.3 cumecs corresponding to a head of 46 m.
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