Write APPROVED if the statement illustration is CORRECT and DISAPPROVED statement/illustration is INCORRECT.

1.Biological waste should be placed in the autoclave onside or inverted with the temperature of 121 C.

2.Weighing paper must be used ONLY on the analytical balances, NEVER on the top loading balances, because there is always the chance that some of the substance being weighed will stick to the weighing paper after the weight has been recorded thus producing an error on the low side.

3.Pipettes and micropipettes are used to measure and deliver accurate volumes of liquid. The difference between the two is that micropipettes measure a much smaller volume, starting at 1 microliter, while pipettes generally start at 1 milliliter.

4.Scales and balances are both weighing machines, however the difference between a scale and a balance is that a weighing balance measures weight relevant to the force of gravity, while a weighing scale is used to compare the mass of two different objects.

5.Close the balance door, while weighing an object, in order to prevent air currents from disturbing the reading. When finished, the operator should close the balance door to prevent dust and dirt from entering the balance.

6.The invention of the autoclave sterilizer is attributed to Charles Chamberland, in 1879. Around that time, researchers started to understand the advantages of sterile surgery, and doctors needed a more reliable sterilization method than open flaming

7.Always superheating liquids. Superheating is a condition that occurs when liquids are at a temperature above their normal boiling point but do not appear to be boiling. Any disturbance of the liquid could cause some of it to violently flash to steam and spraying.

8.To ensure adequate steam penetration, pack solid materials loosely, do not intentionally compact waste or overfill biohazardous waste bags. Bags/containers should be placed in a large, leak-proof, non-glass, shallow pan to contain spills. Stainless steel pans or plastics that can be autoclaved repeatedly at high temperatures (e.g., polypropylene, polypropylene copolymer or fluoropolymers) are recommended.

9.Exposure to biohazardous material may occur if biohazardous waste is improperly packaged or manipulated. The use of pot holder, lab coat, and closed-toe shoes help prevent burns and scalds during loading and unloading the autoclave.

10. This illustration shows the drawing up of liquids with reverse pipetting technique​