Civil and Environmental Engineering Answers

Converting Azimuth to Bearing

Azim of Line DE= 228° 15'

the pitch of a jackscrew shown in figure 2 is 0.3 cm and has a lever arm of 60 cm lenght. What force at the end of the lever arm will raise a load of 190kg if the efficiencyof the machine is 12%?

Compute the angles COD, EOF, GOH, ZOY and XOW from the following set of lines whose magnetic bearings are:

1. OC, N34° 14'E and OD, N53°22'W

2. OE, S15°04'E and OF, S36°00'W

3. OG, N70°15'W and OH, S52°05'W

4. OZ, SO° 59'W and OY, S7°55'E

5. OX, S45°10'W and OW, DUE WEST

6. OR, N54 14'W and OS, N13°22'E

7. OT, N15°04'E and OU, N36°59′W

8. OV, N50°15'W and OW, S53°05'W

9. OX, S80°59'W and OY, S17°55'E

10 OJ, N45 10'E and OK, DUE NORTH

Convert the following azimuths to equivalent bearings.

1. Azim of Line CD = 270'00"

2. Azim, of Line DE = 228 15'

3. Azim, of Line EF = 135'00'

4. Azim, of Line DE=0⁰

5 Azim, of Line EF = 357'59"

6. Azim, of Line CD=70"30"

7. Azim, of Line DE-90°

8. Azim, of Line EF = 135°00'

9. Azim, of Line DE = 200'09'

10.Azim, of Line EF = 37'19'

Convert the following azimuths to equivalent bearings.

Azim of Line CD = 270'00"

The vendor provided 95% pure antimony trioxide [Sb2O3] powder chemical. Molar mass of elements (Sb: 121.8 g/mol; O: 16 g/mol). Solve the following problems to get accurate initial Sb(III) concentration for lab-scale experiments. Hint: The Sb(III) solution needs to be prepared in 1 M HCl solution.

i.How much chemical in mg/L will be required for preparation of 1 g/L Sb(III) stock solution?

ii.What will be the dilution factor to prepare 10 mg/L Sb(III) solution?

As a material engineer in charge of designing concrete mix and facing the following problems, which admixture would you use in each case during mixing or at the jobsite?

a. There is a large quantity of freshly mixed concrete and the work at the jobsite had to stop because of rain.

b. More time is expected to be needed for finishing concrete

c. The structure is subject to freezing

d. Concrete is to be around tightly spaced reinforcing steel

e. Concrete mix will be hauled a long distance

f. High early strength concrete is required, but not necessarily high ultimate strength

According to ASTM C94, are there other tests to be performed to evaluate the suitability of that water? Discuss briefly

The water-cement ratio is important because it influences all of the desirable qualities of concrete. Briefly describe how super high strength concrete (f'c = 15 ksi) can be made?

The water-cement ratio is important because it influences all of the desirable qualities of concrete. Why is the extra water necessary