Free Practice Quiz Question List

4 Order of Draw and Tube Selection Online Quiz Questions

Use this free practice quiz with 20 questions to review 4 Order of Draw and Tube Selection, test your knowledge, and prepare for your next test or exam.

20 questions

True or false

1 point

True or false: A tube’s closure color alone guarantees which additive it contains.

A
True
B
False

Written response

1 point

What is the typical additive in a light-blue tube?

Fill in the blank

1 point

To avoid damaging blood cells, do not additive tubes.

Choose one

1 point

A test requires serum from a tube with a clot activator. Which processing sequence is appropriate?

A
Centrifuge the specimen before allowing it to clot.
B
Allow the specimen to clot, then centrifuge it as instructed.
C
Add an anticoagulant after collection, then leave the specimen unprocessed.
D
Shake the tube vigorously before centrifugation.

Choose one

1 point

A test request specifies a specimen type and tube requirement, but the tube colors in stock vary by manufacturer. What is the best approach?

A
Choose the tube with the most familiar color.
B
Use the same tube type for every test from the patient.
C
Match the tube to the test’s stated specimen requirements and verify the laboratory instructions.
D
Choose whichever tube is available, then adjust the specimen after collection.

Written response

1 point

What specimen type is commonly required for a CBC when the sample is not centrifuged?

Fill in the blank

1 point

With a winged collection set, air in the tubing can underfill the first light-blue tube. Follow laboratory procedure for a when needed.

True or false

1 point

True or false: The position of a specialized tube, such as a yellow ACD tube, should be determined by its additive and test requirements using laboratory instructions.

A
True
B
False

Choose one

1 point

A single draw includes blood cultures, a coagulation test, a chemistry test, and a CBC. Which sequence is the usual order of draw?

A
Blood culture bottles, light blue, serum, then lavender
B
Lavender, serum, light blue, then blood culture bottles
C
Serum, blood culture bottles, lavender, then light blue
D
Light blue, lavender, blood culture bottles, then serum

Choose all

1 point

Select all actions that help prevent identification or collection errors.

A
Identify the patient using at least two approved identifiers and compare them with the order.
B
Prelabel the tubes before approaching the patient to save time.
C
Let the prepared collection site dry completely after applying antiseptic.
D
Label each tube at the patient’s side immediately after collection.
E
Leave unlabeled tubes together and identify them later from memory.

Choose all

1 point

Select all safe collection practices supported by the guidance.

A
Use an approved safety transfer device for syringe collections.
B
Keep the tourniquet on only as long as needed and follow facility limits.
C
Push the syringe plunger into the tube to transfer blood quickly.
D
Mix additive tubes gently and promptly as directed.
E
Avoid shaking tubes vigorously.

Choose one

1 point

A light-blue tube is underfilled despite being intended for coagulation testing. What is the main concern?

A
The blood-to-citrate ratio may be incorrect and distort results.
B
The tube’s closure color may change during processing.
C
The specimen will automatically become serum.
D
The tube will contain too much blood relative to citrate.

Open ended

1 point

Explain the general order of draw for multiple venous specimens and describe when a collector should check laboratory-specific instructions rather than rely on that sequence alone.

Written response

1 point

Before collecting a blood specimen, what is the minimum number of approved patient identifiers you must compare with the order?

Written response

1 point

A test requires glycolysis inhibition, and the laboratory specifies a gray tube. What is the commonly used glycolysis-inhibiting additive in this tube?

Choose one

1 point

A test requires serum. Which processing sequence is appropriate?

A
Centrifuge it immediately, then allow it to clot.
B
Allow it to clot, then centrifuge it as directed.
C
Add an anticoagulant after collection, then centrifuge it.
D
Leave it uncentrifuged because serum is separated from cells without processing.

Choose one

1 point

During one venous draw, you need specimens for blood cultures, coagulation testing, serum chemistry, and a CBC. Which sequence follows the usual order of draw?

A
Light blue, culture bottles, lavender, then serum
B
Culture bottles, light blue, serum, then lavender
C
Culture bottles, lavender, light blue, then serum
D
Serum, culture bottles, light blue, then lavender

Choose one

1 point

A light-blue tube for coagulation testing is underfilled. Why can this make the test results unreliable?

A
A full tube prevents the blood from clotting during transport.
B
The tube must contain extra citrate so the specimen remains stable.
C
The required blood-to-citrate ratio depends on filling to the marked volume.
D
The fill volume determines whether the serum separates from the cells.

Choose one

1 point

You collect blood with a syringe and need to transfer it into collection tubes. Which action best reduces hemolysis and needlestick risk?

A
Use an approved safety transfer device rather than forcing blood from the syringe.
B
Push the syringe plunger into the tube to transfer the full sample quickly.
C
Remove the tube stopper and pour the blood in without a transfer device.
D
Shake the syringe before transferring blood to reduce the risk of clotting.

True or false

1 point

A test requires a whole-blood specimen. The specimen should remain uncentrifuged rather than being spun to separate serum or plasma. Is this statement true or false?

A
True
B
False