24251. Pick out the wrong statement pertaining to the design of a long tube vertical evaporator.
24252. Which of the following is the most common type of baffle used in industrial shell and tube heat exchanger ?
24253. What is the minimum recommended ligament for square pitch arrangement in case of heat exchangers ?
24254. The famous play’Pattabakki’was written by:
24255. Safety valves are provided in chemical equipments to guard against excessive
24256. Who moved resolution requesting the Congress leadership to take the initiative to work for eradication untouchability in Kerala at ‘Kakinada’Session of 1923?
24257. Most of the storage vessels/tanks are made cylindrical, because of the fact that a cylinder
24258. The distance between the top of the slots and the liquid surface when the static liquid is just ready to flow over the overflow weir is called
24259. Liquid gradient over the tray results due to the
24260. The centre to centre distance between two consecutive baffles in a shell and tube heat exchanger is called the baffle pitch or baffle spacing, which is more than 1/5th the I.D. of the shell. Which of the following is not a function of the baffles ?
24261. A high vapour velocity is required for high plate efficiency in a seive plate coloumn. The satisfactory value of operating vapor velocity for design purpose in seive plate column is about __________ percent of the flooding velocity.
24262. The approximate liquid depth in an agitation tank is equal to (where, d = tank diameter)
24263. Baffle width is normally taken as __________ times the tank diameter.
24264. A cylinderical pressure vessel of volume 6 πm3 has to be designed to withstand a maximum internal pressure of 10 atm. The allowable design stress of the material is 125N/mm2 and corrosion allowance is 2 mm. The thickness of the vessel for a length/diameter ratio of 3 will be close to
24265. Which of the following packing materials provides for maximum mass transfer ?
24266. __________ of water makes it a widely used coolant in heat exchangers.
24267. The equivalent diameter for fluid flow through a channel of constant non-circular cross section of area 'A' is given by (where, P = perimeter of the channel in contact with the fluid)
24268. Fouling factor must be included in the calculation of over all design heat transfer coefficient, when the liquid
24269. Lug support is meant for supporting __________ vessels.
24270. Overall mass transfer co-efficient in case of absorption of __________ in water is based on the gas film co-efficient only, as the mass transfer process is gas film (phase) controlling.
24271. Which tube arrangement in a heat exchanger would facilitate highest heat transfer rate ?
24272. In case of 1.5" heat exchanger tubes, the inside flow area __________ with decrease in BWG.
24273. Cylindrical pressure vessels in horizontal condition is generally supported on a __________ support.
24274. Pressure drop per tray in the atmospheric distillation column is about __________ psi.
24275. Welded joint efficiency in the design of chemical process equipment is taken as
24276. The thickness of segmental baffles (25 -35% cut truncated plates usually) is generally __________ the tube wall thickness.
24277. The safe height (h) to diameter (d) ratio (i.e., h/d) for liquid/petro fuel storage tank of capacity more than 45 kilolitres is less than
24278. For given number of passes, pitch & tube diameter, the maximum number of tubes that can be accommodated in a shell of tripled inside diameter will be __________ times.
24279. The ratio of linear stress to linear strain is termed as the
24280. __________ head is the most economical for cylindrical vessels designed for operating at high pressure (> 15 atm.).
24281. Bubble cap plate column is
24282. In seive plate column, holes are drilled or punched in sizes ranging from 2.5 to 12 mm (5 mm being widely used). The hole pitch is normally __________ times the hole diameter to give the required hole area.
24283. North end of West Coast Canal
24284. The force due to wind load acting on a tall vessel depends upon its
24285. Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about __________ mm.
24286. Power required for agitation depends upon the
24287. Tube height in a calendria type evaporator is normally less than __________ metres.
24288. What does the letter “U”stands for in UIAI,the authority for issuing Aadhar Card?
24289. For a 25 mm hole drilled in plates to be rivetted, the shank diameter of the rivet should be __________ mm.
24290. 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)
24291. Optimum economic pipe diameter for fluid flow is determined by the
24292. Pressure differential maintained across a continuous rotary vacuum filter is in the range of __________ mm Hg column.
24293. Vertical storage vessels are never supported by __________ support.
24294. In a double pipe (concentric) heat exchanger, the hydraulic radius for heat transfer (for a fluid flowing through the annulus) would be
24295. Elastic failure of a material occurs, when the tensile stress equals yield strength, yield point or the elastic limit. Also, the elastic failure occurs according to maximum strain theory, when the maximum tensile strain equals (where, σ = yield strength and E = modulus of elasticity)
24296. 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.
24297. What is the slope of the feed line, if the feed to a distillation column is a saturated liquid ?
24298. Filtration rate is affected by the
24299. Liquid gradient over a tray can be minimised by
24300. 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