PLCs

Question 1

PICTORIAL DRAWING

Answer 1

A DRAWING RESEMBLING A PHOTOGRAPH OR 3-D PICTURE.

Question 2

AND

Answer 2

NORMALLY OPEN, IN SERIES

Question 3

OR

Answer 3

NORMALLY OPEN, IN PARALLEL.

Question 4

NOT

Answer 4

NORMALLY CLOSED CONNECTED TO CONTROL A LOAD.

Question 5

NOR

Answer 5

NORMALLY CLOSED, IN SERIES.

Question 6

NAND

Answer 6

NORMALLY CLOSED, CONNECTED IN PARALLEL.

Question 7

5 COMMON SECTIONS OF PLCS…

Answer 7

INPUT, OUTPUT, POWER SUPPLY, CPU, PROGRAMMING DEVICE

Question 8

INPUT SECTION

Answer 8

TERMINAL SCREWS RECEIVE SIGNALS FROM INPUT DEVICES, SEND SIGNALS TO CPU.

Question 9

OUTPUT SECTION

Answer 9

SIGNALS FROM THE CPU TO COMPONENTS.

Question 10

POWER SUPPLY

Answer 10

CONVERTS VOLTAGE OF POWER SOURCE TO VOLTAGE REQUIRED BY CPU.

Question 11

HOLD UP TIME

Answer 11

LENGTH OF TIME A PLC TOLERATES POWER LOSS WITHOUT AFFECTING OPERATION.

Question 12

CPU

Answer 12

CENTRAL PROCESSING UNIT, HOUSES THE “BRAIN” OF THE PLC.

Question 13

PROGRAMMING DEVICE

Answer 13

DEVICE WITH A KEYPAD, WRITE AND ENTER CONTROL PROGRAM INTO THE PLC.

Question 14

FORM FACTOR

Answer 14

PHYSICAL CONFIGURATION, CONNECT THE COMPONENTS OF A PLC INTO A HOUSING.

Question 15

FIXED PLC

Answer 15

PLC, SET NUMBER AND TYPE OF INPUT/OUTPUT TERMINALS.

Question 16

MODULAR PLC

Answer 16

VARIABLE NUMBER OF INPUT/ OUTPUT TERMINALS BASED ON NUMBER OF CARDS.

Question 17

LADDER DIAGRAM

Answer 17

DRAWING CONTAINS LOGIC FOR AN APPLICATION, USED TO TEST AND TROUBLESHOOT HARDWIRED APPLICATIONS.

Question 18

PROGRAMMING RULE 1

Answer 18

EACH LINE OF A DIAGRAM IS REFERRED TO AS A RUNG.

Question 19

PROGRAMMING RULE 2

Answer 19

ONE COMPONENT PLACED ON A RUNG. OUTPUT COMPONENTS CAN BE PLACED IN PARALLEL, NOT SERIES.

Question 20

PROGRAMING RULE 3

Answer 20

INPUT DEVICES PROGRAMMED IN SERIES, PARALLEL OR SERIES/PARALLEL COMBINATIONS.

Question 21

PROGRAMMING RULE 4

Answer 21

INPUT DEVICES AND OUTPUT COMPONENTS CAN BE PROGRAMMED IN NESTED BRANCHES.

Question 22

PROGRAMING RULE 5

Answer 22

NESTED BRANCHES CANNOT OVERLAP.

Question 23

PROGRAMING RULE 6

Answer 23

INPUT DEVICES CAN BE PROGRAMMED AT MULTIPLE LOCATIONS.

Question 24

PROGRAMMING RULE 7

Answer 24

OUTPUT COMPONENTS CAN HAVE VARIOUS TYPES OF INSTRUCTIONS WITH THE SAME ADDRESS.

Question 25

PROGRAMMING RULE 8

Answer 25

OUTPUT COMPONENTS ARE NOT PROGRAMED AT MULTIPLE LOCATIONS.

Question 26

XIC (EXAMINE IF CLOSED)

Answer 26

TRUE 1 FALSE 0

Question 27

XIO (EXAMINE IF OPEN)

Answer 27

TRUE 0, FALSE 1

Question 28

OTE (OUTPUT ENERGIZE)

Answer 28

TRUE 1, FALSE 0.

Question 29

TIMER INSTRUCTION

Answer 29

PROVIDE TIMING FUNCTIONS SIMILAR TO MECHANICAL OR SOLID-STATE TIMERS.

Question 30

COUNTER INSTRUCTION

Answer 30

PROVIDE COUNTING FUNCTIONS SIMILAR TO SOLID-STATE COUNTERS.

Question 31

TIME BASE

Answer 31

INSTRUCTION LABEL USED TO INDICATE THE UNIT OF TIME.

Question 32

TIMER PRESET

Answer 32

NUMBER OF TIME BASE INTERVALS A TIMER INSTRUCTION IS PROGRAMMED TO ACCOMPLISH.

Question 33

TIMER ACCUMULATED VALUE

Answer 33

LENGTH OF TIME THAT A TIMER HAS BEEN TIMING.

Question 34

TIMER OFF-DELAY

Answer 34

USED TO DELAY THE SHUT DOWN OF MACHINERY.

Question 35

RETENTIVE TIMER

Answer 35

TRACK THE LENGTH OF TIME A MACHINE HAS BEEN OPERATING OR TO SHUT DOWN A PROCESS AFTER AN ACCUMULATIVE TIME PERIOD, RECURRING FAULTS.

Question 36

RESET INSTRUCTION

Answer 36

RESET TIMER, COUNTER ACCUMULATED VALUES.

Question 37

COUNT UP INSTRUCTION

Answer 37

COUNT THE NUMBER OF OPERATIONS OR PRODUCTS PRODUCED BY A SYSTEM.

Question 38

COUNT DOWN INSTRUCTION

Answer 38

KEEP TRACK OF THE NUMBER OF ITEMS INVOLVED IN A SUBPROCESS.

Question 39

MECHANICAL SYSTEM

Answer 39

PRIMARY SYSTEM, POWER TRANSMITTED THROUGH GEARS, BELTS, CHAINS, SHAFTS, COUPLINGS AND LINKAGES.

Question 40

INFORMATIONAL SYSTEM

Answer 40

PRIMARY SYSTEM, MONITORS OPERATIONS, DISPLAYS QUANTITIES AND INDICATES STATUS OF MACHINES AND PROCESSES.