Process Equipment and Plant Design Questions

• Hopper/heads geometry in process vessels: the included apex angle commonly used for CONICAL BOTTOM HEADS on chemical process equipment is approximately
• Pipe schedules and dimensions: two steel pipes of the SAME nominal size but DIFFERENT schedule numbers will have the same _____ by definition of standard pipe sizes.
• Comparing pipe schedules: relative to Schedule 80 of the same nominal size, the wall thickness of Schedule 40 pipe is
• Feed thermal condition in distillation: what is the value of the “q” line slope parameter for a SATURATED LIQUID feed entering a distillation column?
• Heat exchanger geometry: in a shell-and-tube exchanger, the “TUBE PITCH” is defined as the _____ between adjacent tubes on the same pattern.
• LMTD correction in multi–shell-pass exchangers In a shell-and-tube heat exchanger, how does the LMTD correction factor FT change when the number of shell passes is increased (for the same terminal temperatures and number of tube passes)?
• Materials for pressure vessels – identify the one seldom used Among the listed steels, which is seldom used for pressure vessel construction due to quality and through-thickness property concerns?
• Siting of petroleum storage tanks – underground vs. aboveground At petrol pumps and similar facilities, storage tanks are normally installed underground when the required capacity is less than how many kilolitres (kL)?
• Packed towers vs. plate (tray) towers – choose the correct statement Considering corrosion, foaming tendency, and pressure drop, which of the following statements is correct?
• Tube layout choice – triangular vs. square pitch in shell-and-tube exchangers Compared with a square pitch, a triangular pitch tube layout in a given shell diameter:
• Supports for vertical vessels – understanding lug supports Which statement best characterizes lug supports for vertical vessels in comparison to skirt supports?
• Pressure drop comparison – 1–2 versus 1–1 heat exchanger (tube side) For turbulent flow in the tubes, the tube-side pressure drop in a 1–2 exchanger is approximately how many times that in a 1–1 exchanger of the same size and tube count at the same liquid flow rate?
• Bag filter operation – typical pressure drop range What is the normal operating pressure drop range across an industrial baghouse (fabric filter), expressed as mm water gauge?
• Rotary vacuum drum filters – typical drum speed What is the normal rotational speed range of the drum in a rotary vacuum drum filter (RVDF), expressed in revolutions per minute (rpm)?
• Stuffing box – primary function in fluid-handling equipment In pumps and valves, a stuffing box is primarily used for which purpose?
• Agitated vertical cylindrical vessel design: Pick the single WRONG statement about geometry and agitation performance.
• Packed absorption tower design data: Operating velocity is typically 40–50% of flooding. What pressure drop is normally used for design per metre of packing (mm H2O per m)?
• Basket-type natural-circulation evaporator: Pick the WRONG statement about configuration and typical service.
• Thick-walled cylinder under internal pressure: Where is the maximum tensile (hoop) stress located?
• Strength terminology in materials: The stress beyond which a material shows permanent set is the yield stress; the highest stress that can be applied without any permanent set is called the __________.