CHMM Health and Safety Management 4 — Questions and Answers
Question 1: Heat stroke is distinguished from heat exhaustion primarily by:
- Loss of thermoregulation and elevated core body temperature above 104°F (40°C) (Correct answer)
- Heavy sweating and cool, moist skin
- Muscle cramps and normal mental status
- Mild headache with body temperature below 102°F
Correct answer: Loss of thermoregulation and elevated core body temperature above 104°F (40°C)
Heat stroke is a medical emergency characterized by thermoregulatory failure, core temp >104°F, and often altered mental status.
Question 2: When using a direct-reading instrument to assess solvent vapor concentrations, the instrument response factor must be applied because:
- Instruments are calibrated to a reference gas and respond differently to other compounds (Correct answer)
- OSHA requires all readings to be multiplied by a safety factor of 10
- Direct-reading instruments measure only particulates, not vapors
- Response factors correct for temperature and humidity only
Correct answer: Instruments are calibrated to a reference gas and respond differently to other compounds
Photoionization detectors (PIDs) and similar instruments are calibrated to isobutylene; response factors adjust readings to actual contaminant concentrations.
Question 3: Under OSHA's confined space standard (29 CFR 1910.146), an 'attendant' is responsible for:
- Monitoring conditions inside and outside the permit space and summoning rescue if needed (Correct answer)
- Entering the space to test atmospheric conditions before the entrant
- Authorizing entry by signing the permit
- Providing rescue services upon entrant distress
Correct answer: Monitoring conditions inside and outside the permit space and summoning rescue if needed
The attendant stays outside the permit space, monitors entrants and conditions, maintains communication, and initiates rescue procedures.
Question 4: The biological exposure index (BEI) established by ACGIH is best described as:
- A reference value for evaluating biological specimens to assess worker chemical absorption (Correct answer)
- A legal occupational exposure limit enforced by OSHA
- An immediate danger to life and health concentration
- A short-term exposure limit averaged over 15 minutes
Correct answer: A reference value for evaluating biological specimens to assess worker chemical absorption
BEIs are ACGIH guidance values for biological monitoring (urine, blood, exhaled air) that correlate with TLV exposures.
Question 5: A drum labeled with a Class 6.1 DOT hazard class contains:
- Toxic material (Correct answer)
- Flammable liquid
- Corrosive material
- Oxidizer
Correct answer: Toxic material
DOT hazard Class 6.1 designates toxic materials (poisons) that are hazardous to human health during transport.
Question 6: In a heat stress program, WBGT (Wet Bulb Globe Temperature) is used because it accounts for:
- Temperature, humidity, radiant heat, and air movement simultaneously (Correct answer)
- Only dry bulb temperature and relative humidity
- Core body temperature of exposed workers
- Chemical toxicity thresholds at elevated temperatures
Correct answer: Temperature, humidity, radiant heat, and air movement simultaneously
WBGT integrates natural wet bulb (humidity), globe thermometer (radiant heat), and dry bulb (air temperature) to reflect actual thermal stress on the body.
Question 7: Which OSHA recordkeeping standard requires employers to record work-related injuries and illnesses on Forms 300, 300A, and 301?
- 29 CFR 1904 (Correct answer)
- 29 CFR 1910.20
- 29 CFR 1910.1200
- 29 CFR 1926.50
Correct answer: 29 CFR 1904
29 CFR 1904 is OSHA's recordkeeping rule, mandating injury and illness logs on the 300 series forms for covered employers.
CHMM Health and Safety Management 4
Heat stroke is distinguished from heat exhaustion primarily by: