What are some common causes of control valve noise?


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i am a student of thapar university final year.can anybody please help me with the exam pattern of the companies:engineers india ltd. ; iocl ; UOP, HPCL. If psbl plz send me the previous years questions on this email id k_arora1987@yahoo.com. i d be really greatful

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Water flows through a pipe with circular cross sectional area at the rate of V / t = 80 L / s where V is the volume and t is time. Let Av = 80 L / s where A is cross sectional area and v is velocity of fluid. For point 1, the radius of the pipe is 16 cm. For point 2, the radius of the pipe is 8 cm. Find (a) the velocity at point 1; (b) the velocity at point 2; (c) the pressure at point 2 by using Bernoulli’s equation where P Rgy 0.5 RV = constant. P is the pressure, R = density of fluid, V = square of fluid’s velocity, g = gravitational constant of 9.81 N / kg and y = 2 m = difference of height at 2 points. The pressure of point 1 is 180 kPa.

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how much type question asking sulfuric acid plat interview. if not maintain acid temp. and conc. what will happen

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Question 45 - According to Raoult’s law for ideal liquid, x (PSAT) = yP where x is mole fraction of component in liquid, y is mole fraction of component in vapor, P is overall pressure and PSAT is saturation pressure. A liquid with 60 mole % component 1 and 40 mole % component 2 is flashed to 1210 kPa. The saturation pressure for component 1 is ln (PSAT) = 15 - 3010 / (T + 250) and for component 2 is ln (PSAT) = 14 - 2700 / (T + 205) where PSAT is in kPa and T is in degree Celsius. By assuming the liquid is ideal, calculate (a) the fraction of the effluent that is liquid; (b) the compositions of the liquid and vapor phases. The outlet T is 150 degree Celsius.

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ELECTRICAL TECHNOLOGY - EXAMPLE 16.1 : According to Shockley equation, the I - V characteristic of a diode is approximated by I = IS [ exp (nVD / VT) - 1 ]. For silicon, let the reverse bias saturation current IS as 0.000000000001. If n is ideality factor with value of 1.5, VT as thermal voltage drop of 0.026 V at room temperature, what is the value of current I that passes through the silicon diode in the heater of evaporator when the forward voltage drop VD = 0.026 V? Please take note that exp is the exponential function with e(1) = 2.718, e(2) = 7.389.

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What are the advantages and disadvantages of using gear pumps?

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What is difference between Piping Standard & Piping Specification ?

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I want to know that what type of questions may be come for fertilizer company for written exam?

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Input the Roll Number, Name and marks of a small section of 5 students. Display the marks database of these students in the following format. The "Roll Number" and "Name" fields are left justified with 15 columns, and 25 columns, respectively. The "Marks" field is right justified with 5 columns. Assume the marks are in multiples of 0.5 and are from 0 to 100. Display some spaces between each field appropriately. Roll Number 11001 11050 11081 11225 Y2367 Name FIRST NAME LAST NAME FIRSTNAME2 LASTNAME2 I1. I2. FIRSTNAME3 FIRSTNAME4 M1. LASTNAME4 FIRSTNAME5 MID LASTNAME5 Marks 95 80 88 77.5 89.5 The input can be stored in a file, say, marksdata.txt, and the program can be executed by using ./a.out < marksdata.txt

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what is isochronus and droop speed?

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ENGINEERING ECONOMY - EXAMPLE 7.3 : There are 2 alternatives of investment. Choice 1 : A trader offers you an investment opportunity where your investment of A$15000 presently will be A$18000 after 4 years. Choice 2 : A bank offers you 5 % annual return for your initial investment of A$15000. Question a : What is the equivalent bank payment after 4 years? Question b : By using the concept of equivalence in engineering economy, which is the better choice, between 1 and 2, that will be more profitable after 4 years?

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How to caliculate the boil up rate, dia and height in both packed and tray distillation columns and any referance books for the design.

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