Title: Chapter #12 Test
Course: Programmable Logic Controls (IC 107-IC 107) > Section: Assessments

Q: A bit shift register shifts bits:
- serially from bit to bit.
- serially between words.
- randomly from bit to bit.
- randomly between words.
A: serially from bit to bit.

Q: All bits in the unused portion of the last word of the file:
- can be used elsewhere in the program.
- can only be used elsewhere in the program if masked.
- can only be used elsewhere in the program if not masked.
- should not be used elsewhere in the program.
A: can be used elsewhere in the program.

Q: As the PLC sequencer advances through its steps, information is transferred from:
- the output module to the input module.
- the input module to the output module.
- the programmer to the processor.
- the word file to the output word.
A: the output module to the input module.

Q: Each time the BSL executes the last bit:
- is shifted out of the array.
- reset to 0.
- set to 1.
- is shifted to the start of the array.
A: is shifted out of the array.

Q: For the sequencer instruction shown, all masked bits:
- can be used elsewhere in the program.
- cannot be used elsewhere in the program.
A: can be used elsewhere in the program.

Q: For the Sequencer Output (SQO) instruction shown the ______________ is the address of the output word to which  the sequencer moves the data.
- Control
- Destination
- Position
A: Control

Q: For the SQO instruction shown, the ___________ is the number of steps of the sequencer file.
- Position
- Control
- Mask
- Length
A: Position

Q: In general the two types of shift instructions are bit shift up and bit shift down.
- True
- False
A: False

Q: Sequencer switches are used whenever:
- a counter function is required.
- a timer function is required.
- a time-delay function is required.
- a repeatable operating pattern is required.
A: a counter function is required.

Q: The data block of the program contains _________.
- 20 words
- 32 words
- 20 bits
- 32 bits
A: 20 words

Q: The found bit (FD) of the SQC program shown, is set true to 1 whenever the:
- instruction is true.
- source pattern matches the sequencer file word.
- source pattern does not match the sequencer file word.
- PLC is powered on.
A: instruction is true.

Q: The sequencer control parameter is where the status bits, length, and instantaneous position are stored.
- True
- False
A: True

Q: The sequencer instruction shown reads the 16 bit data file words:
- one bit at a time.
- one word at a time.
- two bits at a time.
- two words at a time.
A: one bit at a time.

Q: The sequencer instruction shown, controls ________ bits of output word 0:2:
- 2
- 6
- 10
- 15
A: 2

Q: The sequencer program shown is:
- motor-driven.
- time-driven.
- event-driven.
- gear-driven.
A: motor-driven.

Q: The sequencer shown advances its position whenever:
- S1 makes a false to true transition.
- S2 makes a false to true transition.
- the PLC is in the run mode.
- either a or b.
A: S1 makes a false to true transition.

Q: To program a sequencer, binary information is entered into a number of random memory bits.
- True
- False
A: False

Q: When the sequencer shown is at position 2, which output(s) will be energized?
- O:2/12
- O:2/13
- O:2/12 and O:2/13
- O:2/14
A: O:2/12

Q: When the SQI instruction is paired with the SQO instruction as illustrated:
- the same control address, length value, and position value is used for each instruction.
- the sequencer input instruction is indexed by the sequencer output instruction.
- it allows input and output sequences to function in unison.
A: the same control address, length value, and position value is used for each instruction.

Q: You can program a shift register instruction to shift only 1's through the register.
- True
- False
A: False