Topic: Fluid Mechanics
Between section 1 and 2 of a pipe a pump, a heater, a very rough pipe and an orifice plate are placed. The Bernoulli equation can be applied between 1 and 2 if-
- A. Orifice plate and heater are removed
- B. Heater pump and heater are removed
- C. Heater and pump are removed
- D. Heater, rough pipe and orifice plates are removed
Answer: A. Orifice plate and heater are removed
Explanation: Bernoulli's equation is strictly applicable for incompressible, frictionless, steady flow along a streamline without heat or work transfer. In the presence of a pump (work added), heater (heat added), very rough pipe (friction), and orifice plate (sudden energy loss), it cannot be applied. (Note: standard ISRO official key generally targets components causing discontinuous energy transfer; the provided solution text matches option (a), although technically all non-ideal elements violate simple Bernoulli).