Ladder Logic and PLC Programming Quiz

What is the purpose of ladder logic in PLC programming?

• To generate random electrical signals

• To control the speed of electric motors

• To simulate the functionality of relay circuits

• To design complex mathematical algorithms

What is the primary function of examine on (EON) in PLC logic?

• It is true if the addressed bit is OFF (0) and true if the bit is ON (1)

• It is true if the addressed bit is ON (1) and true if the bit is OFF (0)

• It is true if the addressed bit is OFF (0) and false if the bit is ON (1)

• It is true if the addressed bit is ON (1) and false if the bit is OFF (0)

What is the purpose of a line diagram in electrical systems?

• To accurately lay out the relationship of components in a circuit

• To generate random electrical signals

• To design complex mathematical algorithms

• To control the speed of electric motors

What is the main limitation of ladder logic in PLC programming?

• It is not suitable for controlling multiple processes

• It can only handle simple mathematical calculations

• It makes it difficult to program advanced sequential processes

• It is not compatible with electric motors

What is the function of an examine off (EOF) gate in PLC logic?

• It is true if the opposite conditions exist

• It is true if the addressed bit is ON (1) and false if the bit is OFF (0)

• It is true if the addressed bit is OFF (0) and false if the bit is ON (1)

• It allows current to pass anytime the input is not true (1)

What type of logic is used in PLC programming to trigger the output only when both inputs are true?

• AND logic

• OR logic

• NAND logic

• NOT logic

What is the equivalent of a normally closed contact in PLC programming?

• Examine on (EON) gate

• Examine off (EOF) gate

• Input symbol

• Output energize (OUT) symbol

What type of logic is used in PLC programming to trigger the output if any of the inputs are true?

• NOT logic

• AND logic

• OR logic

• NOR logic

What is the primary function of a function block diagram in PLC programming?

• To control the speed of electric motors

• To simulate the functionality of relay circuits

• To generate random electrical signals

• To contain the instructions to a PLC using boxes or blocks

What is the logical order to follow when programming a PLC?

• Always move in a sequential order, placing the next instruction on the list closest to the one you just entered

• Always enter the parallel instructions first

• Always program the instructions in reverse order

• Always program multiple instructions on each parallel branch