COSS Incident Rate Calculations 2

Question 1

A company with 500 employees working 40 hours/week for 50 weeks had 10 recordable injuries. What is the TCIR?

Accepted Answer

4.0

Answer

TCIR = (10 × 200,000) / (500 × 40 × 50) = 2,000,000 / 1,000,000 = 2.0; wait — hours = 1,000,000, so TCIR = (10 × 200,000) / 1,000,000 = 2.0.

Question 2

Which metric specifically measures the number of days away from work per 100 full-time workers?

Accepted Answer

DAFW rate

Answer

The Days Away From Work (DAFW) rate counts only cases involving days away, while DART includes both days away and job transfer/restriction cases.

Question 3

A facility's DART rate is 3.5 and its TCIR is 5.0. What percentage of recordable injuries resulted in days away, restriction, or transfer?

Accepted Answer

70%

Answer

DART/TCIR × 100 = 3.5/5.0 × 100 = 70%, meaning 70% of recordables were serious enough to affect work capacity.

Question 4

In OSHA recordkeeping, 200,000 base hours represents the equivalent of how many full-time workers for one year?

Accepted Answer

100 workers

Answer

200,000 hours = 100 workers × 2,000 hours/year (50 weeks × 40 hours), which is OSHA's standard base for incident rates.

Question 5

An employer recorded 3 injuries: one with 10 days away, one with 5 days of job transfer, and one with no days lost. What is used to calculate the DART rate?

Accepted Answer

Only the first two injuries

Answer

DART counts cases involving days away from work AND cases of job transfer or restriction, so the first two qualify; the no-days-lost case is counted in TCIR but not DART.

COSS - Certified Occupational Safety Specialist Practice Test

COSS - Certified Occupational Safety Specialist Practice Test

COSS Incident Rate Calculations 2