AAB Basic Knowledge-MT practice
questions and answers
Centrifuges (4) - answer #1- Table top centrifuges are used in clinical labs to separate cells from
serum or plasma.
#2- Micro-centrifuges are small centrifuges used for small plastic conical containers with an
integral snap cap.
#3- High speed centrifuges reach speeds b/w 17,000 & 30,000 rpm.
#4- Ultra Centrifuges are high speed centrifuges (15,000 rpm). Small air-driven to separate
chylomicrons from serum.
Pipettes types (3) - answer 1. Automated pipettes
2. semi-automated micro-pipettes
3. Glass pipettes
Automated Pipettes - answer used to prep many samples for analysis and can be apart of an
automated analyzer.
Semi-automated micro-pipettes - answer contain or deliver small volumes of liquid ranging from
1 to 1000ul.
A. air displacement- forward and reverse mode
b. positive displacement
glass pipette - answer A. transfer/ volumetric pipettes have a bulb in the middle with tapered
delivery tip.
B. measuring/ graduated pipettes are uniform in diameter with tapered delivery tip.
C. To contain (TC) or rinse out pip. must be rinsed with appropriate solvent after the initial liquid
has been drained.
questions and answers
Centrifuges (4) - answer #1- Table top centrifuges are used in clinical labs to separate cells from
serum or plasma.
#2- Micro-centrifuges are small centrifuges used for small plastic conical containers with an
integral snap cap.
#3- High speed centrifuges reach speeds b/w 17,000 & 30,000 rpm.
#4- Ultra Centrifuges are high speed centrifuges (15,000 rpm). Small air-driven to separate
chylomicrons from serum.
Pipettes types (3) - answer 1. Automated pipettes
2. semi-automated micro-pipettes
3. Glass pipettes
Automated Pipettes - answer used to prep many samples for analysis and can be apart of an
automated analyzer.
Semi-automated micro-pipettes - answer contain or deliver small volumes of liquid ranging from
1 to 1000ul.
A. air displacement- forward and reverse mode
b. positive displacement
glass pipette - answer A. transfer/ volumetric pipettes have a bulb in the middle with tapered
delivery tip.
B. measuring/ graduated pipettes are uniform in diameter with tapered delivery tip.
C. To contain (TC) or rinse out pip. must be rinsed with appropriate solvent after the initial liquid
has been drained.
