1. What often happens to safety issues during union negotiations?

2. Who is allowed to accompany an OSHA inspector during an OSHA inspection?

3. What are the two types of variances and when might a company be issued each of them?

4. Name the 4 exemptions to labeling requirements

5. what are the two requirements for a business to fall under OSHAs regulations

6. what records is an employer required to keep concerning toxic chemicals?

7. who typically issues a citation if necessary after an inspection?

8. What are the 3 ways that an employer can provide the required workers compensation coverage for his employees?

9. What is OSHA's stand on safety incentives?

- What materials are ( or can be ) used for adhesives? ( general families)
- What kind of "triggers" are used to cause the "curing" of some polymer adhesives?
- What geometries are "best" for adhesively bonded joints ? What are their names, what do they look like, Why are they "best"?
- When should you choose a material for a new product?
- What criteria do you need to consider in material selection?
- How often should you review the materials and processes for an existing product?

One method for reducing the pumping work in throttled spark-ignition engines is early intake valve closing (EIVC). With EIVC, the inlet manifold is held at a pressure pi, which is higher than the normal engine intake pressure pi*. The intake valve closes during the intake stroke. The trapped fresh charge and residual is then expanded to the normal cycle (lower) intake pressure, pi*. You can assume that both cycles have the same mass of gas in the cylinder, temperature and pressure at state 1 of the cycle.

a) Sketch a p-V diagram including both the standard and EIVC cycle. On the p-V diagram, shade the area that corresponds to the difference of pumping work between the standard and EIVC cycles.

b) What value of intake pressure pi and VEIVC will give the maximum reduction in pumping work for the EIVC cycle?

c) Derive an expression for this maximum difference in pumping work between the normal cycle and the EIVC cycle in terms of pe, pi*, Vc and Vm. Justify any assumptions you make.

what are the things to do before, during, after    operation of mechanical rice transplanter ( walk behind type)

Using your understanding of how plastic deformation occurs, explain briefly each of the following ways to strengthen metallic materials

a. strain strengthening (work hardening)

b. alloy strengthening

c. grain boundary strengthening

It is desired to produce liquefied natural gas (LNG), which we consider to be pure methane, from that gas at 1 bar and 280 K (conditions “1” in the Linde process of the diagram). Leaving the cooler (“enfriador”) methane is at 100 bar and 210 K. The flash drum (“separador”) is adiabatic and operates at 1 bar. The recycled methane leaving the heat exchanger is at 1 bar and 200 K. The compressor can be assumed to operate reversibly and adiabatically. However, because of the large pressure change, a three-stage compressor with intercooling is used. The first stage compresses the gas from 1 bar to 5 bar, the second stage from 5 bar to 25 bar, and the third stage from 25 bar to 100 bar. Between stages the gas is isobarically cooled to 280 K.

(a)For each point in the Linde diagram write the conditions you know, and find the corresponding points in the H-P diagram for methane.

(b)Calculate the fractions of vapor and liquid leaving the flash drum.

(c)Calculate the amount of compressor work required for each kg of LNG produced.

Compare the bending moment diagrams of the indeterminate and simply supported beams. What are the advantages of using indeterminate beams? Why are thereactions different from those of the simply suppored beam with similar loading

A regenerative gas-turbine power plant with two stages of compression and two stages of expansion operates on a Brayton cycle with a pressure ratio across the two-stage compressor of 12. Air enters the first stage of the compressor at 100 kPa and 300 K. At the intercooler exit, the temperature is 300 K. In both turbine stages, air enters at 1400 K. The total heat transfer rate to the air in both combustors is 5,000 kW. The regenerator has an efficiency of 70%, both compressor stages have an isentropic efficiency of 75%, and both turbine stages have an isentropic efficiency of 80%. The pressure in the intercooler and reheater is 600 kPa. Using an Air Standard Analysis, find the following

(a) Thermal Efficiency in Percentage
(b) net work output
(c) mass flow rate
(d) Intercooler/Reheater pressure that maximizes the cycle's thermal efficiency
(e) Max Work output

What is the answer to this question?

Imagine if an artificial cartilage is fully made of chondrocytes which has a compression modulus 0.41 KPa and apparent viscosity of 3.0 KPa.s.

a) If such a artificial cartilage is under a sudden load stress of 0.1 KPa, use a simple Kelvin model, can you give an estimate of the time period needed to equilibrium from the given mechanical properties?
b) What is the final equilibrium strain?

c) Plot out the creep function (strain/load stress) of this cartilage under a sudden load stress of 0.1 MPa at time t=0.
You can modify the sample Matlab skeleton code below.
syms sig0 eps emod mvis

dsolve('Deps + (emod/mvis)*eps = sig0/mvis') emod=0.1;
mvis=1.0;
sig0=1.0;

C5=1.0;
t=0:1:100;
epsresult=(sig0 - C5*exp(-(emod*t)/mvis))/emod plot(epsresult,t);

d) Comment on why a good artificial cartilage can not be made with only chondrocytes and what is missing.

Problem 2: Plot the LST (y?axis) corresponding to 10:00 AM versus months (x?axis) (consider the 21st day of each month as the representative of each month) for Panama City Bay, Florida.  

What is the best way to reduce the average grain size in a metal speciman.

A thick steel slab (ρ= 7800 kg/m³, c= 480 J/kg·K, k= 50 W/m·K) is initially at 300°C and is cooled by water jets impinging on one of its surfaces. The temperature of the water is 25°C, and the jets maintain an extremely large, approximately uniform convection coefficient at the surface. Assuming that the surface is maintained at the temperature of the water throughout the cooling, how long will it take for the temperature to reach 50°C at a distance of 28 mm from the surface?

1- The interdependence between materials and their __________ must also be recognized.

a. environment          b. processing          c. structure    d. properties

2-The design process primarily consists of design, prototype, and __________ stages.

a. production          b. selection          c. quality       d. structure

3- Approaches to material selection goes through a sequence of activities of design, material selection, process selection, manufacture, evaluation, and _________.

a. production          b. marketing          c. feedback        d. none of the above

4- List three geometric considerations to consider for the needs of the product.

5- List three mechanical properties to consider for the needs of the product.

6- List three physical properties to consider for the needs of the product.

Chapter 11: Fundamentals of Casting

1- A primary objective of materials processing is the production of a desired shape in the __________ quantity.

a. maximum         b. minimum        c. multiple      d. none of the above

2- The six basic steps in most casting processes include using a mold cavity, melting process, pouring technique, solidification process, mold removal. List the sixth step.

Sixth step is:
          
          

3- One of the first features that must be considered by a designer of castings is the location and ___________ of the parting plane.

a. orientation          b. dimensional accuracy         c. design      d. quality

4- __________ is the term used to describe he taper on a pattern or casting that permits it be withdrawn from the mold.

Riser        b. Gate       c. Draft      d. none of the above