CIS - Certified Instrument Specialist Instrument Manufacturing and Repair 1

Question 1

Which manufacturing process involves heating stainless steel to a specific temperature and then rapidly cooling it to relieve internal stresses and improve ductility?

Accepted Answer

Annealing

Answer

Case hardening

Answer

Tempering

Answer

Sintering

Question 2

What is the primary reason surgical scissors are manufactured with a hollow-ground blade design?

Accepted Answer

To create a sharper, longer-lasting cutting edge

Answer

To reduce the overall weight of the instrument

Answer

To allow easier cleaning during reprocessing

Answer

To improve visibility of the cutting surface

Question 3

During instrument manufacturing, what does the term 'drop forging' refer to?

Accepted Answer

Shaping heated metal by pressing or hammering it into a die

Answer

Dropping finished instruments into a quench tank for hardening

Answer

Casting molten metal into a mold by gravity

Answer

Rolling metal into thin sheets for box-joint construction

Question 4

What characteristic of an instrument's box lock indicates that it requires repair rather than continued use?

Accepted Answer

Lateral wobble or excessive side-to-side movement of the jaws

Answer

A bright, polished appearance at the box lock joint

Answer

A slightly stiff action requiring minimal force to open

Answer

Visible manufacturer's markings near the ratchet

Question 5

Which surface finish on a surgical instrument is best suited for use in procedures where reducing glare from surgical lighting is a priority?

Accepted Answer

Satin or matte finish

Answer

Mirror finish (highly polished)

Answer

Gold-plated finish

Answer

Ebonized (black oxide) finish for non-endoscopic use

Question 6

What is the correct method for testing the tension and alignment of a repaired needle holder prior to returning it to service?

Accepted Answer

Use a test needle of the appropriate size and verify it does not rotate when the ratchet is engaged at the first tooth

Answer

Clamp the largest available suture needle and inspect for jaw marks

Answer

Place the instrument under a magnifying loupe and check jaw surface parallelism only

Answer

Confirm that the ratchet engages smoothly without checking for needle rotation