What would the display window show on a P-20 micropipette when set to 6.3 microliters?

What would the display window show on a P-20 micropipette when set to 6.3 microliters?

• A. 063
• B. 306
• C. 0063
• D. 6.3

Answer: (A)

Pipette displays use a three-digit window with a decimal point that’s not shown. The decimal is implied after the second digit, so the digits represent tens of μL, whole μL, and tenths of μL. Setting 6.3 μL yields digits 0, 6, 3, so the window shows 063. That 063 means 06.3 μL, i.e., 6.3 μL. The other options would indicate different values or formats that don’t match how this display works: 306 would be 30.6 μL (out of the P-20’s range), 0063 isn’t a valid three-digit display, and 6.3 would require a decimal point that isn’t shown.

Pipette displays use a three-digit window with a decimal point that’s not shown. The decimal is implied after the second digit, so the digits represent tens of μL, whole μL, and tenths of μL. Setting 6.3 μL yields digits 0, 6, 3, so the window shows 063. That 063 means 06.3 μL, i.e., 6.3 μL. The other options would indicate different values or formats that don’t match how this display works: 306 would be 30.6 μL (out of the P-20’s range), 0063 isn’t a valid three-digit display, and 6.3 would require a decimal point that isn’t shown.