Chemical Engineering Basics - Study Mode
[#721] Which of the following metals occurs in nature in their free metallic state?
Correct Answer
(D) None of these
[#722] Steels with high carbon equivalent have poor weldability, because in these steels during welding
Correct Answer
(C) Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld
[#723] In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.
Correct Answer
(D) ∞
[#724] __________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.
Correct Answer
(C) Froude
[#725] Production of a hollow product by inflation of a tube or parison is called the __________ process.
Correct Answer
(A) Blow moulding