December II

Radiation:
The tenth value layer for a shield is 2.0 cm.  If you want to reduce the radiation source by a factor of 300 using this shielding material, what thickness should you use?

General Sciences:
If the volume of gas at 100˚C is 1.5 L, what is the volume of the gas at 20˚C?

Noise:
Which classification of noise is described as: sharp burst of sound, lasting less than 0.5 seconds, and repeated less than 1 time per second?

IH Management:
One of the tools used to facilitate quality is the Deming Wheel.  Which of the following components are not a part of the Deming Wheel?

Ergonomics:
Raynaud’s syndrome would most likely be associated with which work task?

Noise:
What is the sound power level for a piece of machinery with a sound power of 2 watts?

IH Chemistry:
Compounds in a sample are separated using gas chromatography (GC) on the basis of:

History:
His writings included some of the first recorded mentions of occupational disease.

General Sciences:
When deciding about the null hypothesis, two types of error may occur.  Which type of error states that you reject the null hypothesis when it is in fact true?

Diseases and Conditions:
The most likely cause for “Farmers Lung” is:

Ventilation:
10 local exhaust hoods are used in a welding shop.  The 10 hoods feed into a main circular duct that is 24” in diameter.  If the velocity pressure in the main duct is 2.0 inches w.g., what is the air flow at each individual exhaust hood?

Radiation:
What does an optical density (O.D.) of 6 indicate?

PPE:
What is the maximum hose length for an airline respirator?

Workplace Hazards:
Exposures to which of the following hazards might pipe-fitters face?

Workplace Hazards:
Abrasive blasting may be associated all of the following health conditions, except:

IH Management:
An accident costs your company $10,000.00.  At 8% profit, how much revenue must your company collect to cover the cost of the accident?

General IH:
Using the Brief and Scala model, what is reduction factor for an employee that works a 10-hour shift and exposed to a chemical with a TLV of 100 ppm?

IH Instrumentation:
Which of the following calibration devices is not considered a primary standard?

Toxicology:
Of the following contaminants, which typically affects the terminal air passages (i.e. alveoli)?

Heat Stress:
What is the WBGT in an indoor setting, given the following:
NWB = 31 ˚C
G = 33 ˚C
DB = 35 ˚C

Biological Hazards:
The average diameter for a fungal spore is:

Ergonomics:
All of the followings terms are relevant to body position descriptions, except:

Ethics:
If you are requested to perform some work for Company X during your free time, should you:

IH Sampling:
Which of the following terms describes, “the flow streamline passes the collecting body within a distance of ½ the particle’s diameter.”

General Sciences:
Given a 1.0 foot diameter pipe and a flow rate of 20 ft³/sec, determine if the flow in the following scenario is laminar or turbulent:
Fluid density = 50 lb/ft³
Fluid viscosity = 0.25 lb/ft-sec

Radiation:
The emission of a beta particle changes the atomic number by what factor?

Air Pollution:
How is the efficiency of baghouse filters affected as more material collects on the filter?

Ventilation:
A capture velocity of _____ is typically required for abrasive blasting processes?

General Sciences:
Determine the specific gravity for a substance whose density is 0.125 lbs/ft³.

Toxicology:
The BEI (urine) for styrene is: