Environmental science

Question 1

Which of the following statements is TRUE?

Answer

[removed] The breathing zone is defined as a two-foot diameter sphere around the worker’s head and shoulders.
[removed] Impingers are plastic containers also known as a bubbler or gas-wash bottle.
[removed] The LOD or the LOQ represent the largest amount of contaminant that can be reliably detected and quantified.
[removed] BEIs, while not a substitute for TLVs or PELs, are useful as complementary data points in evaluating a worker’s absorption of a hazardous material.

4 points

Question 2

What term was first used to measure and describe bioeffluent odor load produced by a standard building occupant (person)?

Answer

[removed] pCi
[removed] BOD (biological oxygen demand)
[removed] IAQN (IAQ normal)
[removed] Olf

4 points

Question 3

Which of the following are nonspecific instruments that are most often used to detect organic vapors, such as alcohols, ketones, and ethers?

Answer

[removed] Wheatstone bridges
[removed] ICP analysis
[removed] PID’s
[removed] Sorbent tubes

4 points

Question 4

Match the correct instrument or technique with its principle of analysis and pertinent analytes.

Answer

[removed] Infrared spectrometry can use column travel time to identify metals.
[removed] ICP can use intensity of absorbance at specific wavelengths to identify organic compounds.
[removed] MS uses intensity of ions formed to identify metals and organics.
[removed] AA uses patterns of energy absorption to identify organics.

4 points

Question 5

When converting from mg/m to ppm, or from ppm to mg/m, the constant that represents the volume, in liters, of one mole of gas at STP is _________.

Answer

[removed] 250 C
[removed] 24.450 C
[removed] 24.45
[removed] 22.5 ppm/mg

4 points

Question 6

Most HVAC systems fall into all of the following main types EXCEPT:

Answer

[removed] multiple zone and variable volume.
[removed] multiple zone and constant volume.
[removed] single-zone and constant volume.
[removed] single-zone and intermittent volume.

4 points

Question 7

What fungal infection usually affects the lungs, resulting in allergic response, or serious injury, sometimes even causing death?

Answer

[removed] Legionnaire’s disease
[removed] Histoplasmosis
[removed] Hanta Virus
[removed] Sick building syndrome

4 points

Question 8

Which of the following is a FALSE statement?

Answer

[removed] The pCi unit is used to describe radon and its daughters in terms of their activity.
[removed] The OSHA regulation on asbestos does require air monitoring during an abatement action.
[removed] The 1995 revisions to the OSHA regulations for asbestos require that building owners identify the asbestos-containing materials present in their buildings.
[removed] Radon is a direct decay product of uranium-238.

4 points

Question 9

Which of the following statements is TRUE?

Answer

[removed] Mold, mildew, and other microbes growing on filter media can be caused by wet or dirty filters.
[removed] Sampling in the presence of interfering compounds will not cause errors in air sampling.
[removed] The response of a direct-reading instrument to a particular gas does not depend on what gas was used to calibrate the instrument.
[removed] Nephelometry depends upon MS not GC instrumentation.

4 points

Question 10

The most commonly used filter is _________.

Answer

[removed] PVC filter
[removed] Glass fiber filter
[removed] Teflon filter
[removed] MCEF filter

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