OSHE 341 Review Questions with complete Solutions 100% Pass
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OSHE 341
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OSHE 341
OSHE 341 Review Questions with complete Solutions 100% Pass
Does a higher or lower LD50 equal a higher toxicity? - Answers The lower the LD50 the higher the toxicity
What equation can be used to find the volume of a rectangular room? - Answers V= (L x W x H)
What equation can you use to calculat...
OSHE 341 Review Questions with complete Solutions 100% Pass
Does a higher or lower LD50 equal a higher toxicity? - Answers The lower the LD50 the higher the
toxicity
What equation can be used to find the volume of a rectangular room? - Answers V= (L x W x H)
What equation can you use to calculate the mass of a particulate when given the volume and
concentration? - Answers Ct = (Mass / Volume)
What equation can you use to calculate an 8 hr TWA of data obtained through field evaluations? -
Answers TWA = (Ct1 x T)+(Ct2 x T)+(Ct3 x T) / (Total Time being Avg)
What is the ideal gas law equation? - Answers PV = nRT; (P= Pressure) (V=Volume) (n=Amount of
Substance) (R=gas constant) (T=Gas Temp)
What is the value of the gas constant in the ideal gas law? - Answers R = 8.314 (J)/(K*mol)
What degree scale is the temperature used in the ideal gas law measured in? - Answers Kelvin
What is the act of close observation of a workplace's conditions for airborne contaminants called? -
Answers Monitoring
What is the collection, detection, identification, and evaluation of an agent or hazard present in an
environmental compartment called? - Answers Sampling
What is the gases temperature in the ideal gas law? Why? - Answers 25C or 298.5K because the gas's
temperature is the same as the room's temperature
What equation can be used when given to gases? - Answers (P1*V1/T1) = (P2*V2/T2)
What is the equation you should use to convert from mg/m3 to ppm and vice versa? - Answers ppm =
[(24.45)*(mg/m3)/MW]
How can you calculate the moles of a substance? - Answers Moles = (Mass/MW)
How do you calculate the Molecular Weight or Molar Mass of a Compound? - Answers By adding up the
total amount of each elements combined atomic weights in the compound
What is a gaseous component that's liquid is at equilibrium at normal temperature and pressure called?
- Answers A Vapor
What are the three broad categories of air and gas sampling devices? - Answers Direct Volume Devices,
Rate of Flow Devices, and Gas Velocity Devices
What equation can be used to determine the Avg Flow rate and Velocity? - Answers Q = V*A; (Q=Flow)
(V=Velocity)(A=Area)
, How do you calculate the area of a circle? - Answers A = Pi*r2
How do you calculate the area of a square/rectangle? - Answers A= L x H
What type of data can be observed but not measured or calculated? - Answers Qualitative Data
What type of data deals with numbers and can be calculated but not observed? - Answers Quantitative
Data
What is the ratio between the concentration of particulates in the air to the the concentration of
particulates found within a respirator mask called? - Answers A quantitative fit factor
What are the six main categories of sampling? - Answers Active/Continuous, Passive, Grab,
Instantaneous, Surface, and Bulk Sampling
What are four types of instruments used to sample air flow? - Answers Rotameter, Orifices, Valves, and
Capillary Tubes
Which type of main sampling category involves the use of pumps? - Answers Active/Continuous
Sampling
What are two advantages of active sampling? - Answers Easy to use and reliable
What are two disadvantages of active sampling? - Answers Pumps require a constant flow rate and
workers tend to feel uncomfortable having to wear the pump the entire shift
What are five components of a sample collecting device? - Answers Orifice/hose, filter, gauge, flow
controller, and some type of suction pump
If the contaminant being sampled has a low concentration in the area what type of sampling should you
use? - Answers Continuous Sampling
What is one of the advantages of Continuous Sampling? - Answers A TWA can be determined
What is one of the disadvantages of Continuous Sampling? - Answers Costly
What does ADME stand for? - Answers Absorption, Distribution, Metabolism, and Elimination
What is the process of transferring a gas/vapor into a uniform liquid called? - Answers Absorption
What is the process of dissolving a gas/vapor pollutant in a liquid absorbent called? - Answers Physical
Absorption
Which of the main sampling categories is based on the Absorption and Adsorption principles? - Answers
Integrated aka Active/Continuous Sampling
What three factors have the greatest effect on a pollutant's solubility during the absorption process? -
Answers The Properties and temperature of the absorbent and the partial pressure of the pollutant
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