IH-Topic5

When analysing samples, blank samples are prepared

• To obtain quality control data points for variations

• To monitor and correct for any background contamination

• To demonstrate the validity of the method

• To ensure reproducibility of the results from the samples

Solid aerosol resulting from the incomplete combustion of carbonaceous materials is called

• Smoke

• Soot

• Mist

• Fog

Tiny particles of the size 25 micron were inhaled  by some workers. The particles might end up in their

• Breathing zone

• Thoracic region

• Respirable region

• Inhalable region

A worker was diagnosed with allergic alveolitis, she could have been exposed to

• Fungi spores

• Cement dust

• Cork dust

• Asbestos

Filter papers used in casette housing for sampling dusts might produce errors if exposed to

• Air temperature

• Moisture content

• Too many/much contaminants

• Electrostatic charges