Chem Orientation Week Fall 2004
Chem orientation week Fall 2004
CHP Quizcrib
1. In what country have you spent most of your adulthood? ______
2. What is the name of the government agency which makes rules (laws, regulations) about EMPLOYEE SAFETY in that country? (If you believe there is none, write NONE; if you do not know, write DON’T KNOW or leave blank)
In the US it is the Occupational Safety and Health Administration (division of Dept of Labor)
3. What is the name of the government agency which makes rules (laws, regulations) about ENVIRONMENTAL PROTECTION in that country?
In the US it is the Environmental Protection Agency
4. Where does wastewater go after it leaves the toilet or sink or shower or washing machine, etcetera (in that country, in the town or city or rural area where you were spending most of your adulthood….)?
The answer is, except for in very very “undeveloped” areas, either
1) a treatment utility (‘sewage treatment plant,’ sewage management utility,’ etc... where biodegradable wastes are biodegraded in a fairly controlled fashion, then the solids removed, and (with routine testing for quality) the “treated” water is discharged into some body of water.
OR
2) a septic system (which I am not well able to explain briefly)
5. If you were asked to write a ."Chemical Hygiene Plan," which would be a booklet of rules for protecting the health and safety of laboratory workers, how many pages long would it probably be, and what would the major subdivisions be?
Purdue’s CHP manual “template” is 100 pages long including appendices and index.
The sections included are essentially mandated by law, the Laboratory Standard, the regulation which requires that a CHP manual be written by an employer such as Purdue, outlines all of the required sections, provisions, and clauses in about six pages.
At.<http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=10106&p_text_version=FALSE>
6. In order to demonstrate your understanding of how chemical hoods work, please use the picture where necessary, and answer all of the following items. (Chemical hoods are commonly called “fume” hoods, but they are mostly used in chemical work to capture vapors, not fumes.)
a. What is the height of the sash opening? ______
b. What is the face area in ft2? ______
c. What is the average face velocity according to the monitor? ______
d. What volume rate of air (ft3/min) must the fan be moving face velocity to be as indicated? (Show work)
______
e. On the picture above label the bypass grill with a B Not all hoods are bypass hoods, but the one pictured here is, and they are still very common.
f. On the picture above label the air foil with an A The airfoil assists greatly with smooth flow and capture of vapors at the lower edge of the front of the hood.
g. On the picture above draw a line all the way across the inside bench top, approximately 6 inches behind the face, to indicate the farthest forward any chemical work should be undertaken. Should appear as a hot pink kind of color.
h. Explain how a hood can capture lighter than air gases which rise to the top of the inside as well as heavier than air vapors, smoke, and fumes which linger at the level of the bench top. The back side of the hood contains a baffle which takes in air at the top and at the bottom of the box.
True or False (circle)
TFi.Hood exhaust is usually filtered before it is exhausted to the outside air. Very rare.
TFj.Hood motors and fans are usually near the top of the building.
TFk.A hood user should never close the hood sash until he/she leaves the area. The sash should be down whenever there’s not a good reason for it to be up. It conserves energy in a lot of hoods, and it provides protection.
TFl.If the sash cable breaks, it should not be possible for the sash to drop and break the operator’s arms or wrists or hands. True that it should not be possible, if the sash weight safety clamp has not been tampered with or destroyed.
TFm.Modern hood sashes commonly weigh about 20 - 30 lbs. More like 40 – 100 lb. They can smash every bone in your wrists to smithereens if they fall.
TFn.The efficiency of containment of a properly functioning hood is not affected by near by air turbulence. It’s a very fragile barrier.
TFo.It is a waste of research time to keep a hood tidy and organized.