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

(a)   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