Home
Subjects
Expert solutions
Create
Study sets, textbooks, questions
Log in
Sign up
Upgrade to remove ads
Only $35.99/year
plc chapter 3
Flashcards
Learn
Test
Match
Flashcards
Learn
Test
Match
Terms in this set (27)
a ___ bit is used to detect errors that may occur while a word is moved
parity
the main advantage of using the gray code is
only one digit changes as the number increases
ASCII code:
1.) is used with absolute encoders.
2.) is considered to be an error-minimizing code.
3.) includes letters as well as numbers.
4.) all of the above.
includes letters as well as numbers
t/f: in any number system, the position of a digit that represents part if the number has a weighted value associated with it
true
Each digit of a binary number is called a?
bit
PLCs work on_____ numbers in one form or another to represent various code quantities
binary
If a given memory unit consists of 1250 16-bit words, the memory capacity would be rated:
a) 1250 bits
b) 20,000 bits
c) 3260 bits
d) 156 bits
20,000 bits
the number 12 is:
a.) 12 in any number system.
b.) 12 in decimal.
c.) 12 in binary.
d.) all of the above.
12 in decimal
in the sign but position, a 1 indicated a(n):
a.) negative number.
b.) positive number.
c.) octal code.
d.) hexadecimal code.
negative number
t/f: in the gray code there is a max of one nit change between two consecutive numbers
true
t/f: the decimal system uses the number 9 at its base
false
the number 127 could not be:
a.) decimal.
b.) hexadecimal.
c.) octal.
d.) binary.
binary
The 2's complement form of a binary number is the binary number that results when:
a.) all the 1's are changed to 0's.
b.) all the 0's are changed to 1's.
c.) 1 is added to the 1's complement.
d.) both a and b
1 is added to the 1's complement
the decimal system has as its base
10
t/f: usually a group of 8 bits is a byte, and a group of or more bytes is a word
true
t/f the radix of a number system is the same as the bse
true
t/f: binary number systems use positive and negative symbols to represent the polarity of a number
false
for base 8 number system, the weight value associated with the 3rd digit would be:
16.
32.
64.
512.
64 (8^2)
In any number system, the position of a digit that represents part of the number has a "weight" associated with its value. The place weights for binary:
a.) start with 1 and are successive powers of 2.
b.) increase by adding 2 for each place, starting with 0.
c.) increase by adding 2 for each place, starting with 2.
d.) start with 2 and double for each successive place.
start with 1 and are successive powers of 2
A memory that has a capacity of 700 sixteen-bit words can actually store __ bits of information.
11,200
t/f: all digital computing devices perform operations in binary
true
t/f: to express a number in binary requires fewer digits than in the decimal system
false
t/f: The hexadecimal number system consists of 16 digits including the numbers 0 through 9 and letters A through F.
true
t/f: The base of a number system determines the total number of unique symbols used by that system.
true
All digital computing devices operate using the binary number system because:
a.) most people are familiar with it.
b.) large decimal numbers can be represented in a shorter form.
c.) digital circuits can be easily distinguished between two voltage levels
d.) all of the above.
digital circuits can be easily distinguished between two voltage levels
t/f: The octal number system consists of digits 0, 1, 2, 3, 4, 5, 6, and 7. There are no 8's or 9's.
true
Two systems of parity are normally used: (a) ____and (b) ___ .
even and odd?
Other sets by this creator
Gen final
37 terms
Industrial Chapter 1
31 terms
Industrial Wiring 2: Electrical Motor Controls for…
18 terms
Industrial Wiring 2: Electrical Motor Controls for…
18 terms
Verified questions
COMPUTER SCIENCE
Suppose the following statement is in a program: price = 99.0. After this statement executes, the price variable will reference a value of this data type. a. int b. float c. currency d. str
COMPUTER SCIENCE
Modify the FeetInches class discussed in this chapter so it overloads the following operators: <= >= != Demonstrate the class’s capabilities in a simple program.
COMPUTER SCIENCE
Write a program that accepts a number entered by the user and prints its Fibonacci series up to 10 times.
COMPUTER SCIENCE
What are the advantages and disadvantages of providing mandatory locks instead of advisory locks whose use is left to users’ discretion?