COSS Incident Rate Calculations 4

Question 1

A company employs 50 temporary workers supplied by a staffing agency who work on-site full time. Whose OSHA 300 log should record their injuries?

Accepted Answer

Whichever employer supervises day-to-day work

Answer

OSHA requires the employer who supervises the employee's day-to-day work to record the injury, which is typically the host employer for on-site temp workers.

Question 2

The 'days away' count on the OSHA 300 log for a single case is capped at:

Accepted Answer

180 days

Answer

OSHA caps the number of days away from work or restricted/transferred at 180 days for recording purposes on the 300 log.

Question 3

A worker is injured on a Monday and returns to full duty Thursday. How many days away from work are recorded?

Accepted Answer

2 days

Answer

Days away = Tuesday and Wednesday (the day of injury is NOT counted); returning Thursday means 2 calendar days away.

Question 4

To calculate a fatality rate per 100,000 workers, the formula denominator uses:

Accepted Answer

2,000,000 hours

Answer

Fatality rate = (fatalities × 200,000,000) / total hours, because 100,000 workers × 2,000 hours/year = 200,000,000 — but it is commonly expressed as fatalities per 100,000 workers directly.

Question 5

A company's TCIR dropped from 5.0 to 2.5 year over year while hours worked doubled. The most accurate interpretation is:

Accepted Answer

The injury rate improved even if absolute cases stayed the same

Answer

Rates normalize for workforce size; if hours doubled and TCIR halved, absolute cases could stay constant yet the rate still shows meaningful improvement per exposure hour.

COSS - Certified Occupational Safety Specialist Practice Test

COSS - Certified Occupational Safety Specialist Practice Test

COSS Incident Rate Calculations 4