7.4 Control measures

Where exposure cannot be prevented, which should be used last?

• 1 Ventilation
• 2 Substitution
• 3 PPE and RPE
• 4 Enclosure

Local exhaust ventilation:

• 1 Is a type of PPE
• 2 Captures contaminants near the source
• 3 Replaces all other controls
• 4 Heats a room

Substances causing cancer, asthma or genetic damage need:

• 1 Only warning signs
• 2 Only PPE
• 3 Additional controls
• 4 No special controls

The first aim in controlling exposure to hazardous substances is to:

• 1 Provide training only
• 2 Prevent exposure
• 3 Wait for symptoms
• 4 Provide RPE

Replacing a hazardous solvent with a less hazardous one is called:

• 1 Absorption
• 2 Substitution
• 3 Segregation
• 4 Isolation

Enclosing a process that releases dust is an example of:

• 1 Personal protective equipment
• 2 A warning sign
• 3 Health surveillance
• 4 An engineering control

General ventilation works by:

• 1 Capturing contaminants at source
• 2 Removing the substance from the building permanently
• 3 Filtering the worker's air supply
• 4 Diluting contaminants in the air

Which is more effective for a dust source at a workbench?

• 1 Opening a window only
• 2 A longer shift
• 3 Local exhaust ventilation
• 4 A warning sign

Respiratory protective equipment should be:

• 1 Used as a last resort after other controls
• 2 The first control chosen
• 3 Shared without cleaning
• 4 Used instead of a risk assessment

Reducing the number of people exposed and the time they are exposed is:

• 1 A substitution
• 2 A legal requirement only
• 3 A control that lowers the dose
• 4 A health surveillance method

Good housekeeping and cleaning:

• 1 Are only for visitors
• 2 Reduce the build-up of contaminants
• 3 Remove the need for RPE always
• 4 Cause more exposure

Health surveillance for hazardous substances is used to:

• 1 Replace controls
• 2 Reduce the cost of PPE
• 3 Remove the substance
• 4 Detect early signs of harm

Substances causing asthma need extra controls because:

• 1 They are never harmful
• 2 They only affect the skin
• 3 Sensitisation can occur from small exposures
• 4 They are easy to measure

Hygiene facilities and procedures reduce:

• 1 Vibration
• 2 Radiation
• 3 Ingestion and skin contact
• 4 Noise

Storage and labelling contribute to control because they:

• 1 Replace training
• 2 Reduce visibility of the hazard
• 3 Prevent mix-ups and show the hazards
• 4 Increase exposure