CIS Component Identification & Handling 2

Question 1

What does a yellow triangle with a hand symbol on component packaging indicate?

Accepted Answer

Electrostatic sensitive device (ESD)

Answer

The yellow triangle with a hand symbol is the ESD sensitivity symbol per ESDA/JEDEC standards, indicating the device is susceptible to electrostatic discharge damage.

Question 2

Which component feature is used to identify pin 1 on a dual in-line package (DIP) IC?

Accepted Answer

A notch or dot on the package body

Answer

DIP ICs use a notch (indent) at one end or a dot near pin 1 on the package body to identify pin 1 orientation.

Question 3

What is the primary purpose of moisture barrier bags (MBB) used for electronic components?

Accepted Answer

To protect moisture-sensitive components from humidity exposure

Answer

Moisture barrier bags protect moisture-sensitive devices (MSDs) from absorbing ambient humidity, which can cause internal delamination or 'popcorning' during soldering.

Question 4

A component is marked '4R7' on its body. What does this marking represent?

Accepted Answer

4.7 ohms

Answer

The 'R' in component markings indicates a decimal point, so '4R7' means 4.7 ohms — a standard EIA marking convention.

Question 5

When handling BGAs (Ball Grid Array packages), what is the primary concern regarding the solder balls?

Accepted Answer

Physical contact can deform or contaminate the solder balls

Answer

BGA solder balls are delicate; physical contact, pressure, or contamination from oils/skin can deform balls or leave residues that affect solder joint quality.

(CIS) Certified IPC Specialist Practice Test

(CIS) Certified IPC Specialist Practice Test

CIS Component Identification & Handling 2