Other Engineering Answers

Hi ,can you help with my btec level 3 advanced certificate in mechanical engineering. From the UK
Many thanks
Steve.

C-S2: Standard battery for the Blackberry Curve 8520
Type: Li-ion
Volts: 3.7 V
Weight: 23 g
Capacity:1150 mAh
Dimensions: 55 x 34 x 5.5 mm

Queston calculate:

1. the battery capacity in Wh
2. the volumetric energy density in Wh/cm3
3. the gravimetric energy density in Wh/kg.

what are the ways that the buildings can be designed to improve in following aspects?

You are a Haz Mat Responder investigating and characterizing a small industrial explosion site. The damaged buildings are located on an overgrown grassy land area that overlies a groundwater aquifer. Inherent to this site characterization is concern for protection of the site workers and the surrounding members of the community. The main building served as a small-scale paint manufacturing facility and produced oil-based paints using organic solvents and metal-based pigments as major raw materials. During site characterization and clean-up there is obvious concern that the relatively porous concrete building itself plus the surrounding land and surface lagoon are contaminated with the released hazardous raw materials. And, of course, there is equal concern that containers of materials will be found within the damaged tri-level (including a basement) building and, perhaps, outside above and/or underground. The building is very old and likely contains insulated pipes and the basement is very damp and musty. In addition, there is the likelihood that pigeons nested in the rafters over the years. The building and site needs to be characterized and, pending the outcome, remediated ("cleaned") to background levels.

Answer these questions please:

Haz Mat Data: Lead, cadmium, and chromium metals and o,m,p-xylene (mix), stoddard solvent, isopropanol, and 2-butanone (methyl ethyl ketone or MEK) solvents are common raw materials used in the oil-based paint manufacturing process. Use MSDSs or the NIOSH Pocket Guide to complete the table. If you do not find info, then simply leave cell in table blank.

Property Lead
Carbonate MEK Isopropanol Stoddard
Solvent
Flash Pt. NA 16°F 53°F 102-110°F
Fire Pt. Non-flammable Flammable. Flammable. Flammable.
Autoignition 404°C (759.2°F) 399°C (750.2°F) 210°C (410°F)
LEL (LFL) NA LEL(200°F): 1.4% 2.0% ?
UEL (UFL) NA UEL(200°F): 11.4% 200°F): 12.7% ?
Flam. Range LOWER: 1.8% UPPER: 10% LOWER: 2% UPPER: 12.7% LOWER: 0.8% UPPER: 5%
Solubility Insoluble 28% Miscible Insoluble
Spec. Grav. 11.34 0.81 0.79 0.78
Vapor Press. 0 mmHg (approx) 10.3 kPa (@ 20°C) 4.4 kPa (@ 20°C) 2 mm of Hg (@ 20°C)
Vapor Dens. 2.41 (Air = 1) 2.07 (Air = 1) 5 (Air = 1)
LD50
LC50
OSHA-PEL [1910.1025] TWA 0.050 mg/m3 TWA 200 ppm (590 mg/m3) TWA 400 ppm (980 mg/m3) TWA 500 ppm (2900 mg/m3)
ACGIH-TLV
NIOSH-REL TWA (8-hour) 0.050 mg/m3 TWA 200 ppm (590 mg/m3) ST 300 ppm (885 TWA 400 ppm (980 mg/m3) ST 500 ppm (1225 TWA 350 mg/m3 C 1800 mg/m3 [15-minute]
STEL
IDLH 100 mg/m3 (as Pb) 3000 ppm 2000 ppm [10%LEL] 20,000 mg/m3
Ionization Potential NA 9.54 eV 10.10 eV


1. Are you concerned about contamination of the building and overall site? If yes, what type(s) of chemical contaminants?

2. Are you concerned about any biological hazards? If yes, what type(s) and sources?

3. Are you concerned about any radiological hazards? If yes, what type(s) and sources?

4. Are you concerned about the piping insulation? If yes, why?


5. During initial site entry and characterization, what is the minimum PPE (specify level and components) you would recommend?

6. Are you concerned about the pipes themselves? (Hint: Some pipes served as conduit to transfer raw materials and products. Eventually, as part of remediation, the pipes will need to be cut and removed).

7. During initial site entry and characterization, what major instantaneous ("real time") air monitoring equipment and SOPs (i.e., strategy; "caution" and "back-out" levels; etc.) would you recommend for use?

8. During opening of containers and/or cutting pipes containing liquids solvents, what major instantaneous air monitoring equipment would you recommend for use?

9. Would you recommend conducting any instantaneous air monitoring during any ongoing site activities (e.g., remediation)? If so, what would you recommend?

10. Would you recommend any integrated ("continuous") air monitoring during any ongoing site activities (e.g., remediation)? If so, what would you recommend?

11. Would you recommend collection of any bulk/grab samples? If so, what would you recommend?

Explain how feedback and sensors are used to regulate variables (temperature, pressure, position, etc.) in Engineering.

Task
1) Robots are used in Manufacturing and many other Industrial contexts.
i) What are the advantages of using Robots (50 words max.) (15 marks)
ii) Explain how feedback and sensors are used to regulate variables
(temperature, pressure, position, etc.) in Engineering. (10 marks)

2) A laser delivers pulses of 2mJ at wavelength 633 nm with a pulse duration of
200 ps. (hint E=h.c/l, with h=6.6 x10-34 J.s and c=3x108 m/s and 1 eV=1.6
x10-19 J)
i) How far do they travel in 1s? (5 marks)
ii) What is the photon energy in eV? (10 marks)
iii) How many photons are delivered per pulse? (10 marks)

3) A 2 kW kettle, 90% energy efficient is used to boil 1 liter of water from 20ºC to
100ºC. (heat capacity of water is 4180 J/kg.K, latent heat of water is 2256
kJ/kg)
i) How long does this take? (20 marks)
ii) How long more to completely boil-off the water (5 marks)
4) Boyle’s law describes the relationship between pressure and volume in a gas at constant temperature.
i) Can you guess what is the effect of temperature on volume for a constant
pressure (~50 words) (10 marks)
ii) Can you guess what is the effect of temperature on pressure for a constant
volume (~50 words) (10 marks)
iii) Can you give two practical examples of the processes mentioned in ii) and iii)
(max 50 words, Hint: in the kitchen and in a car) (5 marks)

Design a combinational logic cirquit to convert XS3BCDcode in to the standard 8421 BCDcode.