Process Equipment and Plant Design Quiz 3

In case of a shell and tube heat exchanger, the effect of L/D on inside film heat transfer coefficient (hi) vanishes after a Reynold number of______?

In actual operation of a bubble cap distillation tower, the _______ at the bottom of the tower is more than that at the top of the tower?

In a shell and tube heat exchanger, tube side ________ of the mass velocity?

In a distillation column, bubble caps are located on trays with a pitch of _______ times the outside diameter of the caps?

In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones; because the smaller diameter tubes _______?

In a multipass shell and tube heat exchanger, the baffles on shell side is primarily provided for_______?

In a _______ riveted joint, the rivets in the various rows are opposite to each other?

Hoop (circumferential) stress induced in a thin walled ?Horton Sphere? used for the storage of liquid ammonia under pressure is______?

Hold up of material in a operating rotary drier is in the range of_____?

In a pressure vessel containing multiple openings of various dimensions at different parts, stress concentration at the edges of the opening is maximum which becomes negligibly small beyond the area covered by _______ times the hole diameter?

If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will ______ times?

In case of saddle packing (e.g., berl and intralox saddles), the maximum size of the packing should not exceed _______ of the column diameter?

In a thin cylindrical shell, the hoop stress is _________ stress?

In case of 1.5? heat exchanger tubes, the inside flow area ______ with decrease in BWG?

In condenser, the cooling water is passed in the tube side in a pass arrangement, because_________?

Height equivalent to a theoretical plate (HETP) is the height of packing that will give the same separation as one theoretical plate in gas-liquid mass transfer operations like distillation, absorption/stripping and humidification/dehumidification. HETP which is experimentally determined, depends upon the________?

In a shell and tube heat exchanger, the shortest centre to centre distance between the adjacent tubes is___________?

In common bubble cap distillation column design practice, riser area is approximately equal to (where, Aa = Annular passage area, and Sa = Slot area) ?

Holes of a sieve tray are arranged in triangular pitch of __________ times the hole diameter?

In most of the shell and tube heat exchangers, the tube pitch is generally _______ the tube diameter?

In distillation columns, bubble caps are held in place over trays by _________?

High pressure fluid in a shell and tube heat exchanger should preferably be routed through the_________?

In case of a shell and tube heat exchanger, the minimum shell thickness for carbon steel (inclusive of corrosion allowance) depends on shell diameter and is in the range of _________ mm?

In a shell and tube heat exchanger, triangular pitch arrangement as compared to square pitch arrangement ?

In a ______ riveted joint, the number of rivets decreases from the innermost row to the outermost row?

In a distillation column, the minimum residence time for liquid in the downspout is about _______ seconds?

In a shell and tube heat exchanger having triangular pitch, the shell side equivalent diameter is given by_________?

In a heat exchanger, shell side fluid velocity can be changed by changing the tube _________?

In a vertical short tube evaporator (Calandria type), the ________?

In actual operation of distillation column, the vapour is not distributed uniformly among the bubble caps, primarily because of the________?

In case of bubble cap distillation column of diameter greater than 1.2 metres, the cap diameter is roughly about ________ cms?

In a multipass shell and tube heat exchanger, the shell side cross flow area does not depend upon________?

In case of design of a shell and tube heat exchanger_____?

Hole diameter of the sieve trays in the distillation column ranges from _______ mm?

In a continuous distillation column, the optimum reflux ratio ranges from ________ times the minimum reflux ratio?

In a shell and tube heat exchanger, the overall heat transfer co-efficient is proportional to the tube side (volumetric flow rate)0.8. This is valid, only when the ratio of the tube side film resistance to the total resistance is almost equal to______?

In case of a continuous distillation column, increase in reflux ratio may result in the_______?

In a shell and tube heat exchanger, the clearance of the tube is generally_____?

In a double pipe (concentric) heat exchanger, the hydraulic radius for heat transfer (for a fluid flowing through the annulus) would be__________?

Height of the flights in the rotary drier is in the range of_____?

In a cylindrical vessel subjected to internal pressure, the longitudinal stress ?L and the circumferential stress, ?n are related by_____?

In a rotary drier, the average retention time of solid is (where Z = length of the drier, metres ? = apparent solid density, kg/m3 L = flow rate of dry solids, kg/see. m2 drier crosssection H = hold up of solid.) ?

In a multiple effect evaporator system having ?n? effects, the amount of water evaporated per unit surface area in approximately equal to ______ times that in a single effect?

In case of plain carbon steel, butt welded joints are used for shell plate thickness ? ______ cms?

In a shell and tube heat exchanger having square pitch, the shell side equivalent diameter is given by (where, P = pitch, d = outside diameter of the tube) ?

In a shell and tube heat exchanger, the ?tube pitch? is defined as the _______?

In case of a ?thin? pressure vessel, the ratio of its diameter to wall thickness is__________?

If ?D? is the inside diameter of the shell of a shell and tube heat exchanger, then the baffle spacing is usually in the range of___________?

In a bag filter, the pressure drop increases directly as the_____?

In a distillation column, minimum clearance to be maintained between the overflow weir and the last row of the bubble caps is _______ cms?