Title: Ch. 6.2.2 quiz
Course: Lab Safety > Section: Day 4

Adapted from Laboratory Safety by Hill and Finster, 2010 by Wiley

Q: Which is true?
- TLVs and PELs are nonmandatory
- TLVs and PELs are mandatory
- TLVs are mandatory, PELs are nonmandatory
- TLVs are nonmandatory, PELs are mandatory
A: TLVs are nonmandatory, PELs are mandatory

Q: What assumption is built into the TWA value with regard to years of exposure?
- A working career
- 10 years
- 20 years
- 30 years
A: A working career

Q: A STEL is based on what duration of exposure?
- 15 minutes
- 30 minutes
- 60 minutes
- One 8-hr work day
A: 15 minutes

Q: A ceiling level is
- A maximum concentration that is allowed at the ceiling of a laboratory
- A minimum concentration that is allowed at the ceiling of a laboratory
- A level that is not to be exceeded at any time
- The level that may not be exceeded for more than 15 minutes
A: A level that is not to be exceeded at any time

Q: When OSHA uses a TLV in regulations,
- The TLV becomes a mandatory PEL
- The TLV is nonmandatory
- It is required that the TLV be updated annually
- The TLV becomes obsolete after 1 year and fades away
A: The TLV becomes a mandatory PEL

Q: The easiest and best source for TLV data is
- The manufacturer's (M)SDS
- Wikipedia toxicity data
- TOXNET
- The OSHA web site
A: TOXNET

Q: The IDHL is an OEL that uses what time frame as the criterion for escape?
- 2 minutes
- 5 minutes
- 15 minutes
- 30 minutes
A: 30 minutes