science F4 chapter 1

Which of the following is the uses of safety shower?

• clean hands from dirt and harmful chemical substances

• rinse and clean the eyes

• clean and rinse the body

Which of the following is not the places for storing and carrying activities involving harmful substances?

• Laminar flow cabinet

• Fume chamber

• Heat chamber

• biological safety cabinet

Which of the following is the uses of laminar flow cabinet?

• Prevents the stored objects form being contaminated by air

• place to carry out activities that involve harmful substances that are volatile

• protect the user from harmful pathogens

• HEPA filter is installed to eliminate bacteria

Which of the following is the function of fume chamber?

• prevents stored objects from being contaminated by air

• place to carry out activities that involve harmful substances that are volatile

• a closed place to protect user from harmful pathogen

• to clean the body or clothing of dangerous chemical substances

___ are worn to protect the hands from contaminated substances and dirt.

Which of the following can be disposed into the sink?

• volatile substances

• organic solvent

• diluted acid

• solid wastes

Which of the following cannot disposed into the sink?

• lead powder

• salt solution

• lime water

• ethanoic acid

Which of the following is the category A waste?

• blood

• carcasses

• cotton wool

• syringe

Which of the following is the category B waste?

• syringe

• cotton wools

• saliva

• biological specimen

Which of the following is catery C waste?

• glass slide

• carcasses organ

• gloves

• serum