NAVEDTRA 14185A, NAVY ELECTRICITY AND ELECTRONICS TRAINING SERIES, MODULE 13-NUMBER SYSTEMS AND LOGIC CIRCUITS

Question 1

What was one of the earliest known calculators that was developed by the Chinese?

Answer 1

Abacus

Question 2

Which year did Blaise Pascal invent the first adding machine?

Answer 2

1642

Question 3

Which part of the number system tells you the number of symbols that are used in the system?

Answer 3

Base

Question 4

Which system is the value of a number defined not only by the symbol but by the symbol’s position?

Answer 4

Positional notation

Question 5

What is the number of times a base is multiplied by itself referred to as?

Answer 5

Power

Question 6

What is the power called when it is written above and to the right of the base?

Answer 6

Exponent

Question 7

Which symbol represents one, or more, complete objects?

Answer 7

Whole number

Question 8

Which type of number is a symbol representing a portion of an object?

Answer 8

Fractional

Question 9

Which type of number represents on, or more, complete objects, and some portion of an object?

Answer 9

Mixed

Question 10

What is the division between whole numbers and fractional numbers referred to as when you use any base other than the decimal system?

Answer 10

Radix point

Question 11

Which digit in a number has the greatest effect on that number?

Answer 11

Most significant digit

Question 12

Which form of counting is where one quantity is added to another?

Answer 12

Addition

Question 13

What is the quantity called to which an addend is added?

Answer 13

Augend

Question 14

What is produced when the sum of two or more digits in a vertical column equals or exceeds the base of the number system in use?

Answer 14

Carry

Question 15

What is the number called from which another number is subtracted?

Answer 15

Minuend

Question 16

What is the simplest possible number system?

Answer 16

Binary

Question 17

What is something used to complete something else called?

Answer 17

Complement

Question 18

How many binary digits is one octal digit the equivalent value of?

Answer 18

Three

Question 19

Which system uses 16 symbols?

Answer 19

Hex

Question 20

What do computer systems use to convert decimal numbers to binary numbers?

Answer 20

Additional circuitry

Question 21

Which number is a dividend divided by called?

Answer 21

Divisor

Question 22

What is the number called resulting from the division of one number by another?

Answer 22

Quotient

Question 23

Which method is the conversion of a decimal number to its 8 base equivalent done?

Answer 23

Repeated division

Question 24

What is the best method for the conversion of octal numbers to decimal?

Answer 24

Positional notation

Question 25

Which two purposes was the microprocessor designed for?

Answer 25

Data processing and control

Question 26

What are the series of electrical pulses called that computers and microprocessors both operate on?

Answer 26

Words

Question 27

What is defined as the science of reasoning?

Answer 27

Logic

Question 28

Which type of voltage is used to represent the logic 1 state of a statement?

Answer 28

Logic polarity

Question 29

What will be used to illustrate all possible input and corresponding output combinations?

Answer 29

Truth table

Question 30

What are the "decision-making" circuits of computers and other types of digital equipment?

Answer 30

Logic gates

Question 31

Which type of logic gate is a logic circuit that requires all inputs to be TRUE at the same time in order for the output to be TRUE?

Answer 31

And

Question 32

Which type of logic device has an output opposuite of the input?

Answer 32

Inverter

Question 33

Which gate is simply an AND gate with an inverter (NOT gate) at the output?

Answer 33

NAND

Question 34

Who developed Boolean Algebra?

Answer 34

George Boole

Question 35

What is a description of the input conditions necessary to get the desired output?

Answer 35

Boolean expression

Question 36

What is a term that is TRUE in one part of an expression will be TRUE in all other parts of the expression?

Answer 36

Law of identity

Question 37

Which law is defined as the order in which terms are written does not affect their value (AB=BA, A+B=B+A)?

Answer 37

Commutative law

Question 38

What is an example of Associative law?

Answer 38

A(BC)=ABC or A+(B+C) = A+B+C

Question 39

What is an example of idempotent law?

Answer 39

AA=A, A+A=A

Question 40

What is an example of the law of intersection?

Answer 40

0(A*1=A, A*0=0)

Question 41

What is an example of the law of union?

Answer 41

(A+1=1, A+0 =A)

Question 42

What is an example of distributive law?

Answer 42

A+(BC) = (A+B) * (A+C)

Question 43

What is an example of the law of absorption?

Answer 43

A*(A+B) =A or A+(AB)=A

Question 44

Which gate is modified OR gate that produces a HIGH output when only one of the inputs is HIGH?

Answer 44

Exclusive OR

Question 45

What are combinations of logic gates that combine binary values to obtain a sum?

Answer 45

Adders

Question 46

Which circuit can add two binary digits but will not produce a carry?

Answer 46

Quarter adder

Question 47

What is designed to combine two binary digits and produce a carry?

Answer 47

Half adder

Question 48

Subtraction is accomplished in computers by the R's complement and what other method?

Answer 48

ADD

Question 49

What may be used to store data temporarily, to multiply or divide, to count operations, or to receive and transfer information?

Answer 49

Flip-flops

Question 50

Which type of bistable device changes state on command from a common input terminal?

Answer 50

Toggle

Question 51

What is the most widely used FF because of its versatility?

Answer 51

J-K FF

Question 52

What is a timing signal generated by the equipment to control operations?

Answer 52

Clock

Question 53

The frequency stability of the astable multivibrator can be increased by applying what to the circuit?

Answer 53

Trigger pulse

Question 54

What allow functions involving more than one operation to be completed during a single clock cycle?

Answer 54

Multiphase clocks

Question 55

What do most modern high-speed equipment use as the basis for their timing networks?

Answer 55

Crystal-controlled oscillators

Question 56

What is the total number of counts or stable states a counter can indicate called?

Answer 56

Modulus

Question 57

Which term is used to describe the count capability of counters?

Answer 57

Modulo

Question 58

Which term means that the events (setting and resetting of FFs) occur one after the other rather than all at once?

Answer 58

Asynchronous

Question 59

High-frequency operations require that all FFs of a counter be triggered at the same time to prevent errors. Which type of counter is used for this type of operation?

Answer 59

Synchronous

Question 60

What is defined as a loop of bistable devices (flip-flops) interconnected in such a manner that only one of the devices may be in a specified state at one time?

Answer 60

Ring counter

Question 61

Which type of temporary storage device is used to store data, memory addresses, and operation codes?

Answer 61

Register

Question 62

Which type of register can the contents be shifted one or more places to the left or right?

Answer 62

Shift register

Question 63

Which term means that the data is moved along a single line one bit at a time?

Answer 63

Serial transfer

Question 64

Which term means that each bit of data is moved on its own line and that all bits transfer simultaneously?

Answer 64

Parallel transfer

Question 65

Which term means to change the magnitude of a number?

Answer 65

Scaling

Question 66

What are groups of logic circuits that are based on particular types of elements (resistors, transistors, and so forth)?

Answer 66

Logic families

Question 67

What is the feature known as when the output of one logic circuit can be used as the input to another logic circuit?

Answer 67

Compatibility