Electronics Part II (Logic Gates, ESD, And Numbering Systems)

Question 1

The hexidecimal system is until number 15, with F representing number 15 and A representing 9; t or f.

Answer 1

F. A represents number 10. F represents number 15.

Question 2

What are the 4 values for a bcd system?

Answer 2

8,4,2,1

Question 3

Do you add or multiply the numbers in the same section of a bcd?

Answer 3

Add.

Question 4

When dividing a number by the base we want to determine, the first number we divide, is that zero or remainder counted? And if so, which side is it put on? What do you do when you get to the end of the calculations and have a remainder?

Answer 4

It’s counted (we write down all numbers that are the result of a division). And is put on the right side. Write the remainder down as is (until there’s only a zero left and calculations are done)

Question 5

In a logic gate, the rounded head symbolizes…

Answer 5

AND

Question 6

A circle in a logic gate symbolizes exclusive; t or f.

Answer 6

F. It symbolizes not.

Question 7

A line behind the symbol curving across it symbolizes exclusive in a logic gate; t or f.

Answer 7

T.

Question 8

True or number 1 is high, while false or zero is low; t or f.

Answer 8

True.

Question 9

To convert octal or hexidecimal to binary, use…

Answer 9

Use tridents (4,2,1) and add together to get each number for octal, and use quadrants (8,4,2,1) for hexidecimal and add numbers to get binary.

Question 10

Name a way to guard against esd

Answer 10

A watch that is grounded (main premise is to create a static safe work area via a conductive path to ground)

Question 11

How should you carry components to guard against esd?

Answer 11

Via a special static shielding container.

Question 12

How many volts to feel esd?

Answer 12

3500

Question 13

Esd is caused by…

Answer 13

Effects of an electric field that surrounds all objects. This can discharge components, induct components, or polarize them.

Question 14

Can inductors cause esd?

Answer 14

Yes, via polarization.

Question 15

Bcd can only be used with…

Answer 15

BCD can only be used with Base 10 (quads system not same as BCD).

Question 16

When converting a hexidecimal letter to binary, do you split the number?

Answer 16

No. Add them togetger to equal the letter number, even if it’s 2 digits.

Question 17

To convert any base to bcd, you must first convert the base to base 10 as bcd only works with base 10; t or f.

Answer 17

T.

Question 18

When counting in octal, which numbers are not used? Wb in hexidecimal?

Answer 18

Numbers 8 and above.
Numbers above 15 (aka f).

Question 19

If a push button is NC, is that high or low?

Answer 19

It’s low. The normal setting is the low setting.

Question 20

A relay coil has its set of contacts in the circuit. Is the state of the contacts shown when the relay coil is energized or not?

Answer 20

It shows de energized state.

Question 21

What does radix refer to?

Answer 21

The base, and the base is the number of unique digits in a numbering system (ie octal is 0-7).

Question 22

How to convert octal to binary?

Answer 22

Via the trident 421 per number.

Question 23

How to convert hexidecimal to binary?

Answer 23

Use 8421 quadrant format

Question 24

How to convert octal to hexidecimal?

Answer 24

Go from octal to groups of three tridents (binary form) and then group them into quadrants (adding zero near end if empty) and write the resultant numbers.

Question 25

Pathways for conversions are (for the following):
1) octal to binary
2) binary to hexidecimal
3) bcd to base 10
4) binary to base 10
5) base 10 to binary
6) octal to hexidecimal

Answer 25

1) trident groups
2) quad groups and then write out the numbers
3) add the quad numbers and write them out
4) multiply out the numbers
5) division and remainder system
6) make trident groups and then quadrant groups using trident numbers filling in empties with zero

Question 26

Bcd is only
Compatible with base 10; using binary quadrants with hexidecimal isn’t the same as bcd; t or f.

Answer 26

T. Using binary quadrants with hexidecimal would give you a binary number, which you’d then convert to base 10 by multiplying it out, and then into bcd quads.

Question 27

For Boolean expressions, line above input a means?

Answer 27

Inverse the output of input a (ie not).

Question 28

In a Boolean, a dot or multiply symbol means AND. And a plus means OR. And a line above any input or both inputs means not or inverse; t or f.

Answer 28

T. You can also have a line above A, a line above B, and a line above both a and b together, all at the same time. Output Y never gets a line though.

Question 29

In a logic gate system, the “low” state of zero state of an input is the denergized state; t or f.

Answer 29

T.

Question 30

Gates act as ___ _____ ___ _____

Answer 30

Solid state electronic relays

Question 31

What are the 7 logic gates?

Answer 31

And, NAND, or, xor, xnor, nor, and not.

Question 32

If given an option between and gate and or gate, you should use…

Answer 32

And gate it in series. And or gate if in parallel.

Question 33

In hexidecimal, what number comes after 37F?

Answer 33

380. 37F is 3715 in hexidecimal form. But the number of placeholders are 3. So we keep the same placeholder number. Thus, it’s 380. Not 3716. In decimal form, 37F is 895. And 380 is 896.