What is the specific discharge in this rectangular channel

Assignment Help Civil Engineering
Reference no: EM13540160

1.A surface water sample has been evaporated until dry in a crucible dish. The dry (tare) weight of the crucible is 44.642gm. The weight of the residue plus the cruciible is 44.6484gm. Determine the total solids (both dissolved and suspended) in the sample if the sample volume was 10 mL.

2.A large concrete channel holds a hydraulic jump in which the subcritical depth of flow is 2.5 m.  If 40 percent of the specific energy in the flow is lost through the hydraulic jump, what is the specific discharge in this rectangular channel?

3.An operator is injured when he ismixing up dilute sodium hydroxide solution by adding solid sodiumhydroxide to an open tank containing water. He adds the sodiumhydroxide too fast, and the heat of dilution causes the solution toerupt from the open tank splashing the operator. What is theinherently safest approach to preventing a recurrence of thisincident? a. Buy sodium hydroxide solution from the supplierat the required concentration and eliminate the mixingoperation.

b. Divide the sodium hydroxidecharge into 10 smaller charges, and add them one at a time, makingsure that each is well mixed and the tank temperature has stoppedincreasing before adding the next charge.

c. Reprimand the operator foradding the sodium hydroxide too fast, and hold a meeting to remindall of the other operators to add sodium hydroxideslowly.

d. Design a closed system tocharge solid sodium hydroxide to a closed tank, so the tank isnever open to the work environment.

4.You are going to paint a room inyour house. You have some left over solvent based paint which youcould use. How can you apply inherently safer design philosophy toreduce the risk of painting?

a. Wear impervious gloves when cleaning your paint brushes withsolvent.

b. Open all windows in the roomto provide good ventilation.

c. Handle and store your solventbased paint in an area away from open flames or other potentialignition sources.

d. Contact your local communityhazardous waste disposal facility, take the left over paint tothem, and buy a can of water based paint to paint yourroom.

5.Which process change does notdescribe an application of the inherently safer design strategy“Moderate”?  

a. A plant replaces anhydrous ammonia with 20% aqueous ammoniasolution for neutralization of an acidic wastestream.

b. A plant storing anhydrousmonomethylamine (boiling point = -6 degrees C) decides torefrigerate the storage tank to reduce the storage pressure toatmospheric.

c. A process development chemistdiscovers that one of the reactants in a process, sodium hydroxide,reacts in a side reaction with the process solvent ethylenedichloride to form toxic vinyl chloride (listed as a carcinogen bymany regulatory agencies), and replaces the ethylene dichloridewith a non-reactive solvent.

d. A plant which manufacturespolymer paint resins by solution polymerization of acrylic monomersin various organic solvents replaces the dry benzoyl peroxidepolymerization inhibitor with water-wet benzoyl peroxide pastecontaining 25% water, which is more stable.

e. Alfred Nobel invents dynamite,which is made by absorbing nitroglycerine on an inert carrier andis much more stable than pure nitroglycerine.

6.A continuous process tomanufacture methyl isocyanate (the highly toxic material releasedfrom a plant in Bhopal, India in December 1984, resulting inthousands of fatalities) with immediate consumption of the methylisocyanate by downstream processes with a total plant inventory ofa few kilograms is an example of which inherently safer designstrategy?

a. Substitute

b. Minimize

c. Simplify

d. Moderate

Reference no: EM13540160

Questions Cloud

What is the velocity of flow in this point : A combined pitot static tube has a coefficient of 0.98. Thedifferential head reading is 0.874m of water when it is positionedon the centreline of a pipe of constant diameter.
When the pressure drops across the basket strainer : Abasket strainer is installed in a 15-cm diameter pipe. Pressuregauges are installed immediately upstream and downstream of thebasket strainer. When water flows at 100 m3/hr, the pressure gaugeimmediately upstream of the basket strainer measures 1 ba..
Determine the maximum bending stress in the strap : An L2 steel strap having a thickness of 0.125 in. and a widthof 2 in. is bent into a circular arc of radius 600 in. Determine the maximum bending stress in the strap.
Estimate the maximum outlet velocity that this system could : A mining engineer plans to do hydraulic mining with a high-speedjet of water. a lake is located H=300 m above the mine site Waterwill be delivered through L=900 m of hte fire house with an inside diameter D
What is the specific discharge in this rectangular channel : A large concrete channel holds a hydraulic jump in which the subcritical depth of flow is 2.5 m.  If 40 percent of the specific energy in the flow is lost through the hydraulic jump, what is the specific discharge in this rectangular channel?
Determine the specifications unstretched length and spring : Determine the specifications (unstretched length and springconstant k) for the elastic cord to be used at a bungee-jumpingfacility. Participants are to jump from a platform 150 ft above the ground. When they rebound, they must avoid an obstacle that ..
What is the totasl annual sinkingfund and interest cost : Airport plans to build a newparallel taxiway on the north side of the airport beween runways.the purpose of building the taxiway is to reduce runway incursionsand make the airport safer. the total future cost of planning,design, and construction is e..
The mass of the water that is displaced by the portion : According to Archimede's principle, the buoyancy force actingon that object that is partially immersed in a fluid is equal tothe weight that is displaced by the portion of the object that issubmerged.
Determine the two possible depths offlow : A 200 m wide natural stream, whose cross-section can beapproximated by a rectangular cross-section, contains a dischargeof 80 cumecs. If the specific energy of the flow is 1.5 timesthe minimum specific energy, determine the two possible depths offlow..

Reviews

Write a Review

 

Civil Engineering Questions & Answers

  Determine the rate of evaporation of water

Water is to be boiledat sea level in a 30 cm diameter stainless steel pan on top of a3-kW electric burner. If60% of the heat generated by the burner is transferred to thewater during boiling, determinethe rate of evaporation of water.

  How much of a reduction in the automobile emission

How much of a reduction in the automobile emission rate would be required to achieve the maximum eight-hour average NAAQS for CO at steady state 9ppmv (10.3 mg/m3)?

  Determine the support reactions and the force in each member

The space truss shown is supported by a ball-and-socket joint at D and by short links at A and C. Determine the support reactions and the force in each member of the space truss.

  Calculate the magnitude and direction of horizontal force

calculate the magnitude and direction of the horizontal force exerted on the contraction (not on the water). Assume that there is no loss of energy in the contraction. Use the gamma of water is equal to 1000 kg/m^3

  Find final temperature of steam and amount of mass transfer

A valve is now opened and steam at 1Mpa at 473 K is allowed to enter the cylinder until the volume inside increases to 0.04m^3 . Determine the final temperature of the steam and the amount of mass transfer

  Resulting center of gravity

The section of the plywood in the 3rd quadrant is sawed off and the resulting piece is then glued squarely over the 4th quadrant portion of the plywood with glue of negligible weight.What are the x- and y-coordinates of the resulting center of gra..

  Determine magnitude of its velocity after the car has travel

A car travels along a circular path such that its speed is increased by a_t=0.5e^t(m/s^2) ,where t is in seconds. The radius of curvature of the path is 30m. Determine the magnitude of its velocity after the car has traveled s = 18m starting from r..

  Design the appropriate reinforced concrete footing on a soil

A combined footing is subjected to an exterior 16 in. x 16 in. column abutting the property line carrying a total service load Pw = 300,000 lb and an interior column 20 in. x 20 in.

  Determine the mean stream flow rate in ac-ft per year

Assume the 20 percent of the annual precipitation reaches the watershed outlet as stream flow. Determine the mean stream flow rate in ac-ft/yr, sfd/yr, and square meter/second

  What are the reactions-shear forces and bending moments

If you have 10 kips acting downward on a foundation and footing, 4 feet long, with uniformly distributed load acting up ward of 2.5 k/ft (soil) also 4 ft long. what are the reactions, shear forces, and bending moments at the tree critical points

  Bernard is a principal in a consulting engineering firm he

bernard is a principal in a consulting engineering firm. he is also a principal owner in a construction contracting

  Determine the pressure head required from the pump

A pump is necessary to lift water from the clear well (reservoir) at a water treatment plant to a storage tower 50-ft high and some distance away. A flow rate of 15 cubic per second (cfs) is required (68F).

Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd