CWD Risk Assessment & Management 5

Question 1

Which type of risk assessment uses numerical probabilities and consequence values to calculate a quantitative risk score?

Accepted Answer

Quantitative risk assessment (QRA)

Answer

A quantitative risk assessment assigns numerical values to probability and consequence, producing a calculated risk score that enables objective comparison between hazards.

Question 2

When drilling within 50 feet of a public road, the PRIMARY risk management measure is:

Accepted Answer

Establishing a traffic control plan with barriers, flaggers, and signage

Answer

A formal traffic control plan using cones, barriers, flaggers, and warning signs protects both workers and passing motorists from collision hazards.

Question 3

A risk register on a drilling project should be updated:

Accepted Answer

Continuously throughout the project as new hazards are identified or conditions change

Answer

A risk register is a living document that must be reviewed and updated whenever site conditions, scope, or identified hazards change during the project lifecycle.

Question 4

What is the OSHA permissible exposure limit (PEL) for crystalline silica (respirable fraction) over an 8-hour shift?

Accepted Answer

0.05 mg/m³

Answer

OSHA's respirable crystalline silica PEL is 0.05 mg/m³ as an 8-hour time-weighted average, established under the 2016 silica standard (29 CFR 1926.1153).

Question 5

Which scenario represents 'risk avoidance' on a well drilling project?

Accepted Answer

Selecting an alternate drill site to avoid drilling through a known contaminated zone

Answer

Risk avoidance eliminates the hazard entirely by choosing not to engage with it — moving the drill site avoids the contaminated zone rather than managing exposure to it.

(CWD) Certified Well Driller Practice Test

(CWD) Certified Well Driller Practice Test

CWD Risk Assessment & Management 5