All Items Are to Be Answered on the Answer Sheet

CHM 605 Exam practice – the items are marked with lecture designation. Study the questions marked with the designations of applicable lectures . p. 7 of 12

Exam items here represent topics, concepts; there is no implication that exam questions will be identical, but they will cover the same and very closely related topics. Unless otherwise indicated, each numbered item has only ONE correct or best answer.

1.  / [1] T
[2] F / A carefully constructed progressive disciplinary policy is an example of an administrative control.
/ ACRO
2.  / If 2000 litres of acetone vapor is released and evenly distributed in a 1,000,000 litre workroom, what is the concentration of acetone in ppm?
[1] / 0.002 ppm / [3] / 0.2 ppm / [5] / 200 ppm
[2] / 0.02 ppm / [4] / 2000 ppm / [6] / None of these is correct
/ ACRO
3.  / If 3000 litres of ethyl acetate vapor is released and evenly distributed in a 10 m x 10m x 10 m workroom, what is the concentration of ethyl acetate in ppm?
[1] / 0.003 ppm / [3] / 0.3 ppm / [5] / 333 ppm
[2] / 0.03 ppm / [4] / 30,000 ppm / [6] / None of these is correct
/ ACRO
4.  / The acronym CDC represents (in the context of the CHM 605 lab safety class)
[1] / Centers for Disease Control and Prevention / [4] / Compact Disk Center
[2] / Center for Disease Control and Prevention / [5] / Covered Disease Category
[3] / Center for Disease Control / [6] / None of these is correct
/ ACRO
5.  / The acronym PEL represents (in the context of the CHM 605 lab safety class)
[1] / partial exposure limit / [4] / potential explosion level
[2] / permissible exposure limit / [5] / personal exposure limit.
[3] / personal environmental limit / [6] / none of the above is correct
/ ACRO
6.  / The acronym SOP (or CHP, or CFR, or DOT, or EPA, IDEM, IOSHA, MSDS, NRC, OSHA, REM, PEL, PPM, TLV, TWA, ANSI, NFPA) represents (in the context of the CHM 605 lab safety class)
[1], [2], [3], [4]…. / ACRO
7.  / The acronym TWA represents (in the context of the CHM 605 lab safety class)
[1] / Threshold Waste Accumulation / [4] / Temporary Work Assignment
[2] / Time Weighted Average / [5] / The Wine Advocate
[3] / Total Water Available / [6] / none of the above is correct
/ ACRO
8.  / The Action Level for an air contaminant is
[1] / a maximum legal concentration, of that material in air, to which an employer can expose employees, usually an 8 h TWA.
[2] / The recommended maximum level of instantaneous airborne exposure for the “healthy general public.”
[3] / Concentration in air of a flammable liquid at which the potential for explosion is 90%.
[4] / The temperature at which a source of ignition 1 cm from the surface of the material will cause it to ignite.
[5] / usually half the PEL..
/ ACRO
9.  / The OSHA Laboratory Standard requires that chemicals transported via public roads, or by rail, sea, or air, must be accompanied by a(n)
[1] / hazardous waste manifest
[2] / Material Safety Data Sheet (MSDS)
[3] / statement of liability and insurance
[4] / effective written exposure control plan
[5] / all of the above are correct
[6] / none of the above are correct
/ ACRO
10.  / The OSHA laboratory Standard requires that employers engaged in laboratory use of chemicals have a written
[1] / Occupational Safety Program
[2] / Hazardous Chemicals Transportation Safety Policy
[3] / Personal Protective Equipment Policy
[4] / Hazard Communication Program
[5] / Chemical Hygiene Plan
[6] / none of the above are correct
/ ACRO
11.  / The OSHA Laboratory Standard requires that the laboratory work areas have
[1] / a first aid kit.
[2] / written standard operating procedures specific for all work with hazardous chemicals
[3] / a chemical inventory updated annually
[4] / an MSDS for every hazardous chemical and chemical formulation in the workplace
[5] / all of the above
[6] / none of the above.
/ ACRO
12.  / The PEL of an air contaminant material is
[1] / a maximum legal concentration, of that material in air, to which an employer can expose employees, usually an 8 h TWA.
[2] / The recommended maximum level of instantaneous airborne exposure for the “healthy general public.”
[3] / Concentration in air of a flammable liquid at which the potential for explosion is 90%.
[4] / The temperature at which a source of ignition 1 cm from the surface of the material will cause it to ignite.
[5] / The energy in mev of the pi electron orbitals.
/ ACRO
13.  / You are comparing two cans of specialty solvent that your child needs for a school project. Solvent A contains 20% methylene chloride (PEL 25 ppm) and no other hazardous chemicals. Solvent B contains 20% toluene (PEL 200 ppm) and no other chemical hazard. They would be used in an identical way, and in a poorly ventilated area. What is the best course of action?
[1] / Get a different project that does not use either solvent.
[2] / Find a solvent that does not contain inhalation hazards.
[3] / Choose the toluene based solvent because it is less poisonous based on the PEL.
[4] / Choose the methylene chloride based solvent because it is less poisonous based on PEL.
[5] / more than one of the above is an acceptable approach
[6] / none of these are very good courses of action.
/ ACRO
14.  / [1] T
[2] F / Ergonomics injuries are often caused by repetitive motion/stress such as heavy work involving movements of the wrists and/or torso and legs..
/ AIIE
15.  / [1] T
[2] F / Ergonomics injuries are often caused by posture – bad posture due to bad habit, or bad posture due to a work station and/or furniture which does not fit properly.
/ AIIE
16.  / [1] T
[2] F / Taking frequent short breaks can help prevent ergonomic injuries from computer use.
/ AIIE
17.  / The OSHA Laboratory Standard 29 CFR 1910.1450 requires that a work-site specific Chemical Hygiene Plan be written and implemented, and that it include a number of carefully prescribed elements (prescribed by the Lab Standard) for every work area where?
[1] / chemicals are used / [4] / radioisotopes are used
[2] / hazardous chemicals are used / [5] / chemicals or chemical mixtures are manufactured
[3] / laboratory use of chemicals takes place / [6] / all of the above are correct answers
/ CHP
18.  / The OSHA laboratory Standard requires that employers engaged in laboratory use of chemicals have a written
[1] / Occupational Safety Program / [4] / Chemical Hygiene Plan
[2] / Personal Protective Equipment Policy / [5] / Hazardous Chemicals Transportation Safety Policy
[3] / Hazard Communication Program / [6] / none of the above are correct
/ CHP
19.  / After a “take cover” (tornado, air raid) has been effected by the outside sirens, and everyone has taken cover in basements or inner hallways of lower floors, what is the signal that tells people that it is safe to come out?
[1] / the sirens stop
[2] / an “all clear” broadcast on the local emergency radio station.
[3] / intermittent alarm which indicates all-clear.
[4] / fifteen minutes after the sirens stop.
[5] / authorities (police, fire dept) state “all clear” to building personnel.
/ EMER
20.  / After a building evacuation, what is the signal given that it is safe for people to re-enter the building?
[1] / when the alarms stop it is safe to re-enter.
[2] / the alarm is sounded in a “beeping” fashion instead of continuously.
[3] / 15 minutes after the alarms stop is the time when it is safe to re-enter.
[4] / the local emergency radio station will broadcast the information.
[5] / none of the above are correct
/ EMER
21.  / If it is not possible to go to the basement when a tornado is coming, you should
[1] / leave in a car / [3] / go out-of-doors / [5] / stay in your lab
[2] / lock the doors / [4] / open all windows and doors / [6] / stay away from windows
/ EMER
22.  / [1] T
[2] F / Liquid nitrogen at 35 psi in a self-pressurizing Dewar is referred to as a compressed gas.
/ GAS
23.  / [1] T
[2] F / Liquid nitrogen at 35 psi in a self-pressurizing Dewar is referred to as a liquefied gas.
/ GAS
24.  / [1] T
[2] F / Generally “compressed gas” means the gas is at ambient temperature and ≥ 40 psig, while “compressed gas” is low or no pressure and at or very near its (cold) boiling point.
/ GAS
25.  / [1] T
[2] F / Generally “liquefied gas” means the gas is at ambient temperature and ≥ 40 psig, while “liquefied gas” is low or no pressure and at or very near its (cold) boiling point.
/ GAS
26.  / Certain compressed gases (HF, HCl, others...) in steel cylinders must not be kept for longer than two years due to pressure build-up and consequent risk of explosion caused by
[1] / polymerization.
[2] / reaction with contaminants.
[3] / reaction of the acid with the steel to produce H2.
[4] / reaction of the acid with the steel to produce O2.
[5] / degradation of steel on the outside of the cylinder due to moisture.
[6] / none of the preceding are correct.
/ GAS
27.  / Cylinders of extremely toxic gas such as NO2, Cl2, F2, AsH3, B2H6, HCN, H2S, COCl2 ....must be stored in a
[1] / location outside of a building.
[2] / room with adequate general ventilation.
[3] / toxic gas cabinet which is exhausted and has a fire protection sprinkler.
[4] / chemical hood.
[5] / none of the above are correct.
[6] / more than one of the above is an acceptable choice for extremely toxic gas storage.
/ GAS
28.  / Liquefied nitrogen is
[1] / cold.
[2] / under pressure ≥ 40 psi.
[3] / toxic.
[4] / a chemical asphyxiant.
[5] / none of the above are correct.
[6] / more than one of the above is correct.
/ GAS
29.  / Notations resembling 11-79 or 11s79 stricken into the body of a compressed gas cylinder indicate
that hydrostat testing (required of provider or shipper)
[1] / was completed on the date (month-year) shown
[2] / is due on the date (month-year) shown
[3] / resulted in cylinder failure at 11.79 psig
[4] / was conducted at 11.79 psig.
[5] / was conducted at 11.79 atm.
[6] / none of the preceding is correct.
/ GAS
30.  / The main hand wheel controlled valve on a compressed gas cylinder is used to
[1] / Regulate the flow of gas from the cylinder.
[2] / Regulate the flow of water from the cylinder.
[3] / Regulate the flow of gas into the cylinder.
[4] / Regulate the flow of water into the cylinder.
[5] / None of these is correct
/ GAS
31.  / The most commonly reported injury associated with cryogen use is/are
[1] / muscle strains and sprains.
[2] / broken bones.
[3] / hearing loss.
[4] / tissue damage (“frost bite” or “cold burn”).
/ GAS
32.  / [1] T
[2] F / The reason a 20 kg hood sash can be lifted and lowered easily with one hand is the special lubricating grease used on the slides.
/ HAC
33.  / [1] T
[2] F / Hoods capture and contain airborne hazards better if the hood opening is kept as large as possible (sash open as wide and tall as possible).
/ HAC
34.  / After a sterilizing cycle has been completed, the autoclave door should be opened
[1] / as soon as the pressure gauge gets down to 15 psi.
[2] / as soon as the pressure gauge gets down to 5 psi.
[3] / only after draining out all of the water.
[4] / rapidly, to release pressure.
[5] / none of the above are correct.
[6] / more than one of the above are necessary and true
/ HAC
35.  / Autoclaves are used to sterilize equipment and supplies, and/or to kill pathogens and other microbes, at temperatures of around
[1] / 100 – 110 oF (38 – 43 oC.
[2] / 121 – 124 oF (49 – 51 oC.
[3] / 150 – 155 oF (66 – 68 oC.
[4] / 212 – 215 oF (100 – 102 oC.
[5] / 250 – 255 oF (121– 124 oC.
[6] / none of the above are correct.
/ HAC
36.  / If a chemical hood alarm is beeping
[1] / it means something is wrong or might be wrong
[2] / it could just be that the alarm is malfunctioning
[3] / the air flow might be too low or too high
[4] / you should press the mute button to stop the noise
[5] / a detector might be indicating that the sash has been left up when the lights were turned off
[6] / all except #4 above
/ HAC
37.  / In a ______hood, closing the sash (reducing the face opening) will cause the volume rate of air pulled into the hood to be decreased while maintaining an adequate face velocity. This results in energy savings without compromising safety.
[1] / bypass grill / [4] / filtered chemical
[2] / constant air volume / [5] / variable air volume
[3] / biological / [6] / simple fume
/ HAC
38.  / In a ______hood, closing the sash (reducing the face opening) will cause the face velocity to increase through the remaining smaller face opening, often to the point of causing a problem of knocking things over.
[1] / bypass grill / [4] / filtered chemical
[2] / constant air volume hood, no bypass / [5] / variable air volume
[3] / biological
/ HAC
39.  / The part of the centrifuge which can break into two or more pieces at high spinning speeds and cause disastrous damages, injuries, or deaths, is the
[1] / spindle.
[2] / centrifuge.
[3] / speed controller.
[4] / rotor.
[5] / shell.
[6] / none of the above are correct.
/ HAC
40.  / What is the range of hood face velocities which is commonly regarded as adequate for good containment of harmful vapors, fumes, and dusts?
[1] / 100 – 150 ft/min / [3] / 80 – 125 ft/min / [5] / 60 – 100 ft/min
[2] / 100 – 125 ft/min / [4] / 80 – 100 ft/min / [6] / 60 – 80 ft/min
/ HAC
41.  / When should a centrifuge rotor be removed from service permanently or subjected to a professionally performed assessment by a specialist?