AAB BASIC KNOWLEDGE LATEST 2026 PRACTICE EXAM
QUESTIONS AND SOLUTIONS RATED A+
✔✔Gray-stopper tube - ✔✔-contains sodium fluoride (a preservative) and potassium
oxalate (an anticoagulant)
USE: sodium fluoride whole blood or plasma.
-should be labeled "Plasma, Sodium Fluoride"
✔✔Blue-stopper tube - ✔✔-contain sodium citrate
-tubes with a 3.2% sodium citrate concentrations are recommended
✔✔Green-stopper tube - ✔✔-contains sodium heparin or lithium heparin
USE: heparinized whole blood or plasma
-should be labeled "Plasma, Sodium Heparin" or "Plasma, Lithium Heparin"
✔✔Yellow-stopper tube - ✔✔-contains 1 ml acid citrate dextrose (ACD) solution
USE: ACD whole blood
✔✔Royal blue-stopper tube - ✔✔-contains sodium EDTA for trace metal studies
USE: EDTA whole blood or plasma
-should be labeled "Plasma, EDTA"
✔✔Plastic tubes - ✔✔-although plastic red-stopper and serum-separator tubes are
becoming the standard for assays performed on serum, they are not preferred in all
situations
-plastic tubes are not appropriate for blood drug screens or serum or blood alcohol tests
-use of plastic tubes may yield inaccurate results
-preferred container for these assays is glass
✔✔What is used for venipuncture? - ✔✔-standard double-pointed needle or
multisampling needs
-a 21 or 22-gauge needle is used
✔✔When sending Infectious Substance Packing - ✔✔should include a Shipper's
Declaration for Dangerous Goods form, 2 Class 6 Infectious Substances labels and 2
Infectious Substance, Affecting Human labels
✔✔Prothrombin Time (PT) - ✔✔-blood test that measures how long it takes blood to clot
-can used to screen for bleeding abnormalities
-also used to monitor treatment with medication that prevents the formation of blood
clots
✔✔Partial Thromboplastin Time (PTT) - ✔✔-blood test that measures the time it takes
blood to clot
-can be used to screen for bleeding abnormalities
, ✔✔5 levels of Fire Hazard - ✔✔4= very flammable
3= readily ignitable
2= ignited with heat
1= combusted
0= will not burn
✔✔5 levels of Health Hazard - ✔✔4= deadly
3= extreme danger
2= hazardous
1= slightly hazardous
0= normal materials
✔✔5 levels of Reactivity Hazard - ✔✔4= may detonate
3= shock and heat may detonate
2= violent chemical change
1= unstable if heated
0= stable
✔✔Specific Hazard abbreviations - ✔✔OXY= oxidizer
ACID= acid
ALK= alkali
COR= corrosive
✔✔Levels of Priorities - ✔✔-top
-second
-third
-fourth
✔✔Top Priority - ✔✔-Imminent danger
-any condition where there is reasonable certainty that a danger exists that can be
expected to cause death or serious physical harm immediately.
-present a serious and immediate threat to life and health
✔✔Second Priority - ✔✔-catastrophes & fatal accidents
-investigation of fatalities & catastrophes resulting in hospitalization of 3 or more
employees
-must be reported to OSHA within 8 hours
✔✔Third Priority - ✔✔-Employee complaints
-employee complaints of alleged violation of standards or of unsafe or unhealthful
working conditions programmed high-hazard inspections
✔✔Fourth Priority - ✔✔-programmed or planned inspections aimed at specific high-
hazard industries, occupations or health substances
QUESTIONS AND SOLUTIONS RATED A+
✔✔Gray-stopper tube - ✔✔-contains sodium fluoride (a preservative) and potassium
oxalate (an anticoagulant)
USE: sodium fluoride whole blood or plasma.
-should be labeled "Plasma, Sodium Fluoride"
✔✔Blue-stopper tube - ✔✔-contain sodium citrate
-tubes with a 3.2% sodium citrate concentrations are recommended
✔✔Green-stopper tube - ✔✔-contains sodium heparin or lithium heparin
USE: heparinized whole blood or plasma
-should be labeled "Plasma, Sodium Heparin" or "Plasma, Lithium Heparin"
✔✔Yellow-stopper tube - ✔✔-contains 1 ml acid citrate dextrose (ACD) solution
USE: ACD whole blood
✔✔Royal blue-stopper tube - ✔✔-contains sodium EDTA for trace metal studies
USE: EDTA whole blood or plasma
-should be labeled "Plasma, EDTA"
✔✔Plastic tubes - ✔✔-although plastic red-stopper and serum-separator tubes are
becoming the standard for assays performed on serum, they are not preferred in all
situations
-plastic tubes are not appropriate for blood drug screens or serum or blood alcohol tests
-use of plastic tubes may yield inaccurate results
-preferred container for these assays is glass
✔✔What is used for venipuncture? - ✔✔-standard double-pointed needle or
multisampling needs
-a 21 or 22-gauge needle is used
✔✔When sending Infectious Substance Packing - ✔✔should include a Shipper's
Declaration for Dangerous Goods form, 2 Class 6 Infectious Substances labels and 2
Infectious Substance, Affecting Human labels
✔✔Prothrombin Time (PT) - ✔✔-blood test that measures how long it takes blood to clot
-can used to screen for bleeding abnormalities
-also used to monitor treatment with medication that prevents the formation of blood
clots
✔✔Partial Thromboplastin Time (PTT) - ✔✔-blood test that measures the time it takes
blood to clot
-can be used to screen for bleeding abnormalities
, ✔✔5 levels of Fire Hazard - ✔✔4= very flammable
3= readily ignitable
2= ignited with heat
1= combusted
0= will not burn
✔✔5 levels of Health Hazard - ✔✔4= deadly
3= extreme danger
2= hazardous
1= slightly hazardous
0= normal materials
✔✔5 levels of Reactivity Hazard - ✔✔4= may detonate
3= shock and heat may detonate
2= violent chemical change
1= unstable if heated
0= stable
✔✔Specific Hazard abbreviations - ✔✔OXY= oxidizer
ACID= acid
ALK= alkali
COR= corrosive
✔✔Levels of Priorities - ✔✔-top
-second
-third
-fourth
✔✔Top Priority - ✔✔-Imminent danger
-any condition where there is reasonable certainty that a danger exists that can be
expected to cause death or serious physical harm immediately.
-present a serious and immediate threat to life and health
✔✔Second Priority - ✔✔-catastrophes & fatal accidents
-investigation of fatalities & catastrophes resulting in hospitalization of 3 or more
employees
-must be reported to OSHA within 8 hours
✔✔Third Priority - ✔✔-Employee complaints
-employee complaints of alleged violation of standards or of unsafe or unhealthful
working conditions programmed high-hazard inspections
✔✔Fourth Priority - ✔✔-programmed or planned inspections aimed at specific high-
hazard industries, occupations or health substances
