ASTM D4530

Which of the following equations is used to calculate percent residue?

• (A-W)W x100

• (Ax100)/W

• A/Wx100

• (A+W)/100 x 0.01

For values up to 10% report the value obtained as Micro Method carbon residue, percent to the nearest ____ % (m/m)

• 0.001

• 0.01

• 0.1

• 1.0

The thermocouple located in the oven shall be in constant contact with the sample vials during testing

• True
• False

The nitrogen purge may be shut off

• After the 15 minute hold at 500 ^oC

• After furnace power is shut off

• While the oven is cooling

• After samples are removed from the oven

The large 4-dram glass sample vials are for samples:

• at risk of component loss due to splattering

• suspected to contain ash-forming constituents or non-volatile additives

• that require heating

• expected to yield residues <0.10% (m/m)

Samples expected to be below 0.10% weight % (m/m) residue should be distilled to remove ___ % (v/v) of the flask charge

• 70

• 80

• 90

• 100

Which of the following methods are acceptable to prepare solid materials for transfer. (sellect all that apply)

• Dissolving in acetone

• Chipping off smaller pieces with a chisel

• Freezing with liquid nitrogen and then shattering

• Heating

Distillation of a 100 mL sample be discontinued when ___ mL of distillate has been collected​

• 80

• 86

• 88

• 990