CMSP CMSP Occupational Health & Industrial Hygiene

Question 1

What is the MSHA permissible exposure limit (PEL) for respirable coal mine dust for miners without pneumoconiosis?

Accepted Answer

2.0 mg/m³

Answer

MSHA's PEL for respirable coal mine dust is 2.0 mg/m³ for miners who do not have evidence of pneumoconiosis.

Question 2

Coal workers' pneumoconiosis (CWP), commonly called 'black lung,' is caused by prolonged inhalation of:

Accepted Answer

Respirable coal and mixed mine dust

Answer

CWP results from the long-term deposition of respirable coal and mixed mine dust in the lungs, causing progressive fibrosis.

Question 3

Which industrial hygiene sampling method is required by MSHA to assess a miner's personal exposure to respirable dust?

Accepted Answer

Personal breathing zone sampling using a personal dust monitor (PDM)

Answer

MSHA requires personal breathing zone sampling to capture the actual dust concentration inhaled by individual miners during their work shift.

Question 4

What does the term 'threshold limit value – time weighted average' (TLV-TWA) represent?

Accepted Answer

The average airborne concentration to which workers may be exposed 8 hours/day, 40 hours/week without adverse effects

Answer

The TLV-TWA is the ACGIH-established concentration for a normal 8-hour workday and 40-hour workweek that nearly all workers can be repeatedly exposed to without adverse health effects.

Question 5

Which of the following best describes the 'hierarchy of controls' approach to occupational health hazards in mining?

Accepted Answer

Elimination → substitution → engineering controls → administrative controls → PPE

Answer

The hierarchy of controls prioritizes elimination of the hazard first, then substitution, engineering controls, administrative controls, and PPE as the last resort.

(CMSP) Certified Mine Safety Professional Practice Test

(CMSP) Certified Mine Safety Professional Practice Test

CMSP CMSP Occupational Health & Industrial Hygiene