DPLI Screening flashcards
DPLI Screening · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- ALARP
- As Low As Reasonably Practicable: risk must be reduced unless the cost of further reduction is grossly disproportionate to the benefit gained.
- Hierarchy of controls
- Ranked risk controls from most to least effective: elimination, substitution, engineering controls, administrative controls, then personal protective equipment.
- Prohibition notice
- A regulator's order halting an activity that involves a risk of serious personal injury, effective immediately until the danger is remedied.
- Permit to work
- A formal written authorisation controlling high-risk tasks such as hot work, confined space entry, or isolation, specifying precautions and validity period.
- Lockout tagout verification
- The step confirming zero energy state after isolation, by attempting start-up or testing for residual pressure, voltage, or stored energy.
- Reportable incident
- An event such as a fatality, serious injury, dangerous occurrence, or specified disease that must be notified to the regulator within a set time.
- Risk assessment
- A structured evaluation identifying hazards, estimating likelihood and severity, and recording controls and residual risk.
- Calibration traceability
- An unbroken chain of documented comparisons linking the instrument's readings to a national or international measurement standard.
- Measurement uncertainty
- The quantified range within which the true value lies, used to decide whether a result genuinely conforms at a specification limit.
- Hydrostatic pressure test
- A strength test filling the vessel with water and pressurising typically to 1.5 times design pressure for a specified hold time.
- Dye penetrant testing
- A non-destructive method applying penetrant to a surface, removing excess, then using developer to reveal surface-breaking defects.
- Magnetic particle inspection
- A non-destructive method magnetising ferromagnetic material and applying particles that cluster at surface and near-surface discontinuities.
- Insulation resistance test
- Applying a DC test voltage and measuring resistance in megohms to verify insulation integrity of cables, motors, or equipment.
- Hold point
- A stage in an inspection and test plan where work cannot proceed until the nominated inspector has witnessed and accepted it.
- Sampling plan
- Defined rules giving lot size, sample size, acceptance number, and rejection number for deciding whether a batch conforms.
- Centrifugal pump curve
- A plot of head against flow at constant speed, showing that delivered flow depends on system resistance.
- Pressure relief valve set pressure
- The inlet pressure at which the valve begins to open under specified conditions, protecting equipment from overpressure.
- Fail-safe design
- A design principle whereby a component failure drives the system to a predetermined safe state, such as a valve failing closed.
- 4-20 mA loop
- An analog signal standard where 4 mA represents the live zero, allowing detection of broken wiring below that value.
- Galvanic corrosion
- Corrosion accelerated when two dissimilar metals contact in an electrolyte, the more active metal becoming the anode.
- Stress corrosion cracking
- Crack growth in a susceptible alloy under combined tensile stress and a specific corrosive environment, often with little visible warning.
- Instrument loop
- The complete measurement path: sensor, transmitter, signal wiring, controller, and final control element such as a valve.
- Controlled document
- A document with identified revision, approval, and distribution, where superseded copies are withdrawn from use.
- Record versus document
- A document states requirements and can be revised; a record is evidence of results achieved and is retained unchanged.
- Non-conformance report
- A record stating the requirement not met, the objective evidence, the disposition, and the corrective action required.
- Traceability
- The ability to link material or product to its certificates, test results, and batch or serial numbers through records.
- Legible correction rule
- Changes to records must be signed or initialled, dated, and leave the original entry still readable, typically single-line strike-through.
- Audit trail
- Metadata recording who created or changed a document or record, when, and what changed, supporting integrity of electronic systems.
- Independence of inspector
- The rule that an inspector must not verify work they designed, performed, or supervised, to preserve objectivity.
- Conflict of interest declaration
- Disclosing any financial or personal interest in the inspected party so the conflict can be managed or the assignment reassigned.
- Falsification of test results
- Recording or signing for tests not performed, or altering data; this is fraud and grounds for decertification.
- Scope of competence
- The limit of qualification, training, and authorisation within which an inspector may accept work without referral.