CET Coding & Classification Systems 2

Question 1

In the EIA color code system, what multiplier does a gold band represent?

Accepted Answer

0.1

Answer

A gold band in the multiplier position represents a multiplier of 0.1, shifting the base value one decimal place to the left.

Question 2

Which JEDEC prefix letter indicates a small-signal NPN transistor in the 2N series?

Accepted Answer

2N

Answer

The JEDEC 2N prefix designates a bipolar transistor (both NPN and PNP types) registered with the JEDEC organization.

Question 3

In binary-coded decimal (BCD), what is the decimal value of the code 1001 0011?

Accepted Answer

93

Answer

In BCD, each 4-bit group represents one decimal digit: 1001 = 9 and 0011 = 3, so the value is 93.

Question 4

Which coding system uses mark and space to represent binary 1 and 0 in serial communications?

Accepted Answer

NRZ (Non-Return to Zero)

Answer

NRZ coding holds a high voltage (mark) for logic 1 and low voltage (space) for logic 0 throughout each bit period.

Question 5

What is the hexadecimal equivalent of binary 1101 1010?

Accepted Answer

DA

Answer

Splitting into nibbles: 1101 = D and 1010 = A, giving hexadecimal DA.

(CET) Certified Electronics Technician Practice Test