Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
1. In the system shown schematically below, water is supplied to a spray nozzle by a gear pump with a constant output of 20 US gpm. The flow rate of water discharged through the nozzle is controlled by manipulating the flow of water re-circulated around the pump using a proportional-plus-integral controller. The set point of the controller is normally 14 US gpm but can vary between 9 and 18 US gpm. The flow sensor has a range of 0-20 US gpm and responds instantaneously to flow variations. The control valve has a CV of 3 US gpm/psi1/2, a time constant of 2 seconds, a linear installed characteristic and is current-to-close.
(a) What should be the action of She controller (reverse or direct)? Why?
(b) Would it be better to eliminate the recirculation loop and install the control valve immediately downstream of the pump? Why?
(c) If the pump discharge pressure is 100 psig when the control valve is closed, show that the flow rate across the nozzle is 8 US gpm when the control valve is wide open,
Notes: The valve and nozzle are the only significant flow resistances in this system. You may also assume that the pump suction port and the spray leaving the nozzle are at atmospheric pressure. The nozzle behaves as an orifice.
(d) What are the outputs of the controller and flow transmitter (in %) when the set point is 12 US gpm and steady-state has been achieved?
Ask question #haMinimum 100 words accepted#Okkkk Hardness of bore well water is less than sea water. Justify
a. Describe the problems of flooding and channelling in packed tower b. Describe the construction and working of sieve tray, bubble cap tray and counter flow tray c. Describe
will u provide chemical properties of nitroparaffins and its block diagram for preparation of nitroparaffins?
Outline a procedure for photolithography in the fabrication of electronic devices. What are the limitations of this procedure? Photolithography is the process of transferrin
Calculate ?G of Eqs?IX-1 and IX-2 for the case of n-octane and plot against r over the range r=5 to 3ooA and for the two cases of x=2 and x=250.Assume 20? IX-1:?G=-n?µ+4pr2? IX-2:?
USES Sensors and devices based on Hall Effect are used for: 1 Analog multiplication 2 Current sensing 3 Position and motion sensing 4 Automotive ignition and fuel in
What is the basis of classification of hot and cold working? Cold and hot working: Changing the shape of material by extrusion, forging, rolling, and drawing include plastic
ACTIVITY 1 INVESTIGATION OF THE STORE Investigate the store of any one of the laboratories in your study centre and write a report in approximately 500 words. Procedure
putting example of literature review
given the displacement vectors A(3^i-4^j+4^k)m and B(2^i+3^j-7k)m,find the magnitudes of the vectors (a)C=A+B and (b)D=2A-B,also expressing each in terms of its rectangular compone
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd