WSQ Kitchen Hygiene and Cleaning

Question 1

What is the difference between 'cleaning' and 'sanitising' in a Singapore food establishment?

Accepted Answer

Cleaning removes visible dirt and food residues; sanitising reduces bacteria to safe levels using heat or chemical sanitisers — both steps are required

Answer

Cleaning (removing visible dirt) and sanitising (killing bacteria) are two distinct steps. Cleaning must come first — sanitisers cannot work effectively on dirty surfaces. Both are required by food safety regulations.

Question 2

What is the correct concentration of chlorine (bleach) solution for sanitising food contact surfaces in Singapore?

Accepted Answer

Approximately 100-200 ppm (parts per million) of available chlorine, following manufacturer's dilution instructions

Answer

The recommended sanitising solution is 100-200 ppm chlorine. Too little is ineffective; too much can leave harmful chemical residues on food contact surfaces. Always follow manufacturer dilution guidelines.

Question 3

How often should food preparation surfaces be cleaned and sanitised?

Accepted Answer

Before and after each use, between different tasks (especially between raw and cooked food), when contaminated, and at regular intervals during continuous use

Answer

Food contact surfaces must be cleaned and sanitised frequently: between tasks, between raw and ready-to-eat food preparation, when visibly contaminated, and at least every 4 hours during continuous use.

Question 4

What is the correct order of steps for cleaning and sanitising kitchen equipment?

Accepted Answer

Scrape/pre-rinse, wash with hot soapy water, rinse with clean water, sanitise, and air dry

Answer

The five-step process: (1) scrape off food debris, (2) wash with hot detergent solution, (3) rinse with clean water, (4) sanitise with approved sanitiser, (5) air dry (do not use towels).

Question 5

How should chopping boards be managed to prevent cross-contamination in Singapore kitchens?

Accepted Answer

Use separate colour-coded boards for raw meat (red), poultry (yellow), seafood (blue), vegetables (green), and cooked/ready-to-eat food (white)

Answer

Colour-coded chopping boards prevent cross-contamination by ensuring surfaces used for raw meat never contact ready-to-eat food. Replace boards when they become deeply scored or cracked.

WSQ Food Safety Practice Test

WSQ Food Safety Practice Test

WSQ Kitchen Hygiene and Cleaning