cleaning

Question 1

2 types of detergent

Answer 1

soapy and synthetic

Question 2

made from boiling animal and vegetable fat with strong alkali (used for skin, clothes and soft fabric)

Answer 2

soapy detergent

Question 3

made from natural petroleum chemical (used for housekeeping)

Answer 3

synthetic chemical

Question 4

made from mild to strong concentrated hydrochloric acid. have to use protective gear (mask, gloves & etc.)

Answer 4

acid cleaner

Question 5

used for metal cleaning

Answer 5

citric acid and acetic acid

Question 6

removing lime from sanitary ware

Answer 6

dilute hydrochloric acid

Question 7

removing stubborn water stains from floor or sanitary wares

Answer 7

oxalic acid

Question 8

2 types of cleaners

Answer 8

alkaline cleaners and solvent cleaners

Question 9

used for washing clothes and removing grease (need of strict supervision because it is corosive and poisonous)

Answer 9

alkaline cleaners

Question 10

dry cleaning and stain removal
(mostly used for windows, mirror, picture frames)

Answer 10

solvent cleaners

Question 11

to kill harmful bacterias and germs

Answer 11

disinfectants

Question 12

decreasing the number of microorganisms

Answer 12

sanitizing

Question 13

3 sanitizing methods

Answer 13

radiation, heat and chemicals

Question 14

methods of using heat to sanitize surfaces

Answer 14

steam and hot water

Question 15

applied to food factories for packaging

Answer 15

radiation method

Question 16

include chlorine, iodine and quaternary ammonium

Answer 16

chemical method

Question 17

3 factors affecting the efficiency of sanitizing

Answer 17

concentration, temperature and contact time

Question 18

sanitizers

Answer 18

chlorine, iodophors and quaternary ammonium compounds

Question 19

concentration time for chlorine

Answer 19

7 seconds