CIDB Green Card (e-SICW) flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Hierarchy of control

The ordered sequence of risk controls from most to least effective: elimination, substitution, engineering controls, administrative controls, then personal protective equipment as the last resort.

Risk assessment formula

Risk is the product of the likelihood of harm occurring and the severity of that harm. Both factors are assessed, scored and compared with a defined tolerance threshold.

Employer's general duty

Provide and maintain a safe workplace, safe plant and systems of work, plus adequate information, instruction, training and supervision for all workers exposed to risk.

Worker duty of care

Take reasonable care of your own health and safety and that of others, follow safe systems and instructions, and report hazards, incidents and defects promptly.

Hazard versus risk

A hazard is any potential source of harm, such as a live cable or an open excavation. Risk is the likelihood and severity of harm arising from that hazard.

Residual risk

The level of risk remaining after controls have been applied. It must be reduced to as low as reasonably practicable before work is authorised.

Permit-to-work system

A formal written authorisation for high-risk tasks such as confined space entry, hot work or live electrical work, specifying precautions, validity period and authorised signatories.

Control verification

Confirming that a chosen control is actually in place and effective, with a named responsible person, target date and documented sign-off before the task begins.

Helmet replacement rule

Head protection must be replaced after any significant impact, or when cracked, deformed or beyond the manufacturer's stated service life, because impact damage may be invisible.

Hearing protection SNR

The single number rating of a hearing protector. Derate it according to the manufacturer's guidance before comparing with the noise exposure level on site.

Respirator fit testing

A quantitative or qualitative test confirming the mask seals to the wearer's face. Required before first use and repeated when the model or wearer's facial features change.

Abrasive wheel speed rating

The maximum safe rotational speed marked on the disc. It must equal or exceed the tool's spindle speed, and the guard must remain fitted during use.

Work at height hierarchy

First avoid work at height, then prevent falls using an existing safe place or guardrails, then minimise the distance and consequences of any remaining fall.

Fall arrest clearance

The total distance needed below an anchor: lanyard length plus free-fall distance plus shock absorber extension plus body height plus a safety margin above the surface.

Scaffold inspection interval

Scaffolds must be inspected by a competent person before first use, after alteration or adverse weather, and at intervals not exceeding seven days while in use.

Ladder angle rule

A leaning ladder should be set at approximately 75 degrees, a 1 in 4 ratio of base distance to height, secured at top and bottom and used with three points of contact.

Excavation spoil distance

Spoil, materials and plant are kept at least one metre back from the excavation edge to reduce surcharge loading and prevent objects falling onto workers below.

Trench inspection trigger

A competent person inspects the excavation at the start of each shift and after any event affecting stability, such as heavy rain, vibration or ground movement.

Crane load chart

A graph or table giving rated capacity for each working radius and boom configuration. Capacity falls as radius increases, so maximum capacity cannot be assumed.

Lift exclusion zone

A barriered area beneath and around a suspended load where no person may stand or pass. Tag lines are used from outside this zone to control rotation.

Isolation and lock-off

Isolate the supply, fit a personal lock and tag, then prove the circuit dead with a tested voltage detector before starting work on the equipment.

Confined space definition

An enclosed or partially enclosed space not designed for continuous occupancy, presenting specified risks such as toxic gas, flammable atmosphere, oxygen deficiency or engulfment.

Atmospheric entry limits

Normal air contains about 20.9 percent oxygen. Entry is generally prohibited below 19.5 percent or above 23.5 percent, the latter increasing fire and explosion risk.

Hot work fire watch

A trained person remains at the hot work location during the task and for a defined period afterwards, commonly 30 to 60 minutes, to detect smouldering combustion.

Safety Data Sheet

A 16-section document supplied with a hazardous substance, covering hazards, composition, first aid, firefighting, handling, exposure controls and disposal information.

Exposure limits TWA and STEL

The 8-hour time-weighted average is the average airborne concentration over a working shift. The short-term limit applies to any 15-minute reference period.

Health surveillance trigger

Required where a substance or agent can cause identifiable disease or adverse health effects, for example respirable crystalline silica, lead, noise or hand-arm vibration.

Site welfare facilities

Drinking water, washing facilities with soap, sanitary conveniences, drying facilities and a sheltered rest area must be provided and maintained throughout the works.

Fire triangle

Combustion requires fuel, oxygen and a heat source. Removing any one of the three sides prevents or extinguishes the fire.

Extinguisher classes

Class A solids, B flammable liquids, C gases, D metals, F cooking oils, plus electrical. Water is unsuitable for live electrical, metal and oil fires.

Accident investigation aim

Establish root and contributing causes across task, equipment, environment, person and management, then assign corrective actions with owners and completion dates.

Safety sign shapes

Prohibition is a red circle with a slash, warning a yellow triangle, mandatory a blue circle, safe condition a green rectangle and fire equipment a red rectangle.