In hydrostatic testing of welded pipe (for leakage, strength etc.) the ratio of minimum hydrostatic test pressure to internal design pressure is around ________?

Floating head heat exchangers are used for the________?

Generally, no corrosion allowance in wall thickness of a part is required, if the thickness is more than ________ mm?

In the reaction, C + O2 → CO2; ΔH = – 94 kcal. What is the heat content (enthalpy) of O2?

Vertical condenser is advantageous to the horizontal condenser from operation point of view, when________?

Drills are usually made of________?