Term

1.1 The TLV-C is the concentration of a substance that: a) a worker can be exposed to for one hour without adverse effect b) a worker can be exposed to over a working lifetime without adverse effects c) a worker can be exposed to up to 4 times per day d) should never be exceeded

Definition

D: Should never be exceeded. TLV-C stands for Threshold Limit Value Ceiling Limit. It is the exposure limit that should not be exceeded at any time.

Term

1.2 When trying to fix an electrical machine, your first. action should be to: a) replace any old cables b) replace the fuses c) turn off all electricity to the lab d) turn the machine off

Definition

D: Turn the machine off. Before trying to fix electrical equipment, you should turn the equipment off to avoid the risk of electric shock.

Term

1.3 How should you pick up an item of hot glassware? a) By pouring cold water on it to cool it down b) With a rag or paper towels c) With tongs d) With your hands

Definition

C: With tongs.