23951. The value of fouling factor depends upon the
23952. In case of bubble cap distillation column of diameter greater than 1.2 metres, the cap diameter is roughly about __________ cms.
23953. Tube side pressure drop in a 1-2 heat exchanger (for turbulent flow of fluids through the tubes) is about __________ times, that in a 1-1 heat exchanger having the same size & number of tubes and operated at the same liquid flow rate.
23954. To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of
23955. In a heat exchanger, shell side fluid velocity can be changed by changing the tube
23956. Where does the maximum tensile strength occur in a thick cylindrical vessel subjected to internal pressure ?
23957. It is not desirable to design a heat exchanger for LMTD correction factor, FT, of less than
23958. A rivetted joint does not fail by __________ of rivets.
23959. Triangular pitch tube layout as compared to square pitch in a shell and tube heat exchanger
23960. Bracket supports are the most suitable for supporting __________ vessels.
23961. In a multipass shell and tube heat exchanger, the shell side cross flow area does not depend upon
23962. Two iron pipes of the same nominal diameter but different schedule numbers will have the same
23963. Steam side heat transfer co-efficient for design consideration under ordinary condition can be assumed to be about __________ kcal/hr.m2.°C.
23964. The Constitution of India borrowed the idea of Directive Principles from
23965. Lessing ring is formed by the addition of a partition across the centre of a raschig ring, which results in an area increase of about __________ percent.
23966. In chemical process equipments, the conical bottom heads used, usually has an apex angle of
23967. Smaller sized packings are generally dumped to the packed columns, and the large ones of size greater than __________ mm are stacked individually, which provides better control over bed porosity and offers lower gas pressure drop.
23968. Shell side heat transfer co-efficient in case of square pitch as compared to the triangular pitch under similar condition of fluid flow and tube size is
23969. Correct use of 'factor of safety' is very important in equipment design. It is defined as the ratio of the
23970. The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about __________ mm of water column per metre height of packing.
23971. __________ tray arrangement is recommended for distillation column having diameter upto 4 ft.
23972. What is the value of 'q' for saturated liquid feed to a distillation column ?
23973. In perforated plate towers, the
23974. The main purpose of providing stepping on the trays is to
23975. The operating pressure drop range in a bag filter is about __________ mm water gauge.
23976. The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.
23977. For laminar flow (NRe < 2100) in steel pipe, the optimum inside pipe diameter is given by
23978. The Indian Constitution has been divided in to:
23979. Wall thickness of schedule 40 pipe as compared to that of schedule 80 pipe is
23980. Pick out the wrong statement pertaining to the design of a basket type evaporator.
23981. Pick out the wrong statement pertaining to the design of the bubble cap tray of a distillation column to give stable operation and even vapour distribution.
23982. Speed of the drum of the rotary vacuum filter normally ranges from __________ rpm.
23983. A stuffing box is used for
23984. Pressure drop (Δp) and the superficial gas mass velocity (G) in case of packed absorption tower operating in the preloading range are related as
23985. Pick out the wrong statement.
In an agitated vertical cylinderical reaction vessel, the
23986. Needle valves are generally not used for
23987. 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
23988. Which of the following words were added to the preamble through an amendment in the Constitution carried out during emergency in 1976?
23989. With increase in gas flow rate to fabric surface area ratio (Nm3/hr/m2 fabric surface area), the size & the cost of a bag filter
23990. A head comprises of straight flange section, corner torus, section and central dished section. Crown radius and knuckle radius in a head is related respectively to the
23991. Number of evaporators which can be used in service in a multiple effect evaporation system is limited by the
23992. Which of the following is used to set the diameter of the distillation column ?
23993. Ponchon Savarit method is based on the use of enthalpy concentration diagram, which contains the bubble point curve (saturated liquid curve), dew point curve (saturated vapour curve) and equilibrium tie lines. As compared to McCabe-Thiele's method, this method
23994. The optimum size ratio for two mixed reactors in series depends on the kinetics of the reaction and the conversion level. For reaction orders more than one, the
23995. In a shell and tube heat exchanger, tube side __________ of the mass velocity.
23996. Which of the following is not a graphical method (but is an analytical method) for the calculation of theoretical number of stages in case of continuous binary distillation?
23997. Saddle supports are used for supporting __________ vessels.
23998. The diameter of a propeller agitator used in agitation tank ranges from __________ percent of the tank diameter and its peripherial speed is normally 300 to 500 metres/minute.
23999. In packed towers provided with saddle packing, liquid redistributors are positioned at every __________ times column diameter or 6 metres whichever is less.
24000. Optimum reflux ratio in a continuous distillation column is determined by the