Correct answer
A. 2.5 to 4.0
Explanation
The correct answer is 2.5 to 4.0.
Tube wall thickness depends on the corrosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than ________ mm outside diameter is generally not recommended for fouling fluids?
A pressurised water reactor (PWR) uses pressurised water as a________?
Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines?
Which of the following parameters remains constant during chemical dehumidification?
What is the number of degree of freedom for a system of two miscible non-reacting species in vapor-liquid equilibrium forming an azeotrope?
The quantity of heat required to evaporate 1 kg of a saturated liquid is called ________?