Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 43 views

    Ch-1 - Questions

    Uploaded by

    Sal Fozilov

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    Ch-1 - Questions

    Uploaded by

    Sal Fozilov
    43 views6 pages

    Original Title

    Ch-1- Questions

    Copyright

    © © All Rights Reserved

    Available Formats

    PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    43 views6 pages

    Ch-1 - Questions

    Uploaded by

    Sal Fozilov

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 6

    Page 1 of 5

    Name: Date:
    Chapter -1

    Multiple Choice
    Identify the choice that best completes the statement or answers the question.

    ____ 1. Programmable logic controllers are used to control ____.


    A. robots
    B. electric motors
    C. conveyors
    D. All of the above.
    ____ 2. PLCs were first introduced in the ____.
    A. automotive industry
    B. power industry
    C. process industry
    D. None of the above.
    ____ 3. PLCs are designed to replace ____.
    A. microprocessors
    B. microcontrollers
    C. electromechanical relay panels
    D. desktop computers
    ____ 4. Which of the following component(s) can be found in a PLC?
    A. central processing units
    B. input/output ports
    C. power supply
    D. All of the above.
    ____ 5. The first PLC was built by ____.
    A. General Motor
    B. Allen-Bradley
    C. Siemens
    D. IBM
    ____ 6. Which of the following is part of the central processing unit (CPU)?
    A. RAM and ROM memory units
    B. Microprocessor
    C. Support chips
    D. All of the above.
    ____ 7. A microprocessor has a(n) ____.
    A. arithmetic logic unit (ALU)
    B. decode unit
    C. data and instruction cache
    D. All of the above.
    ____ 8. Changing relay logic requires ____.
    A. rewiring the relays
    B. changing input port names
    C. changing output port addresses
    Page 2 of 5

    D. None of the above.


    ____ 9. An advantage of changing a relay logic circuit over a PLC logic control is ____.
    A. it is less expensive
    B. it is less time consuming to program
    C. it has less current capability
    D. None of the above.
    ____ 10. Static RAM ____.
    A. requires more space than dynamic RAM on the PLC motherboard
    B. is more expensive than dynamic RAM
    C. requires more transistors and has faster response than dynamic RAM
    D. All of the above
    ____ 11. Which of the following statements is false?
    A. EPROM can be programmed several times.
    B. EEPROM can be programmed several times.
    C. Flash ROM can be programmed several times.
    D. Masked ROM can be programmed several times.
    ____ 12. Which of the following statements is false?
    A. Optoisolators are used to protect CPU from high voltage in the input port
    B. Optoisolators are used to protect CPU from a short circuit in the output port
    C. Optoisolators are used to protect the input/output devices
    D. Optoisolators are used to isolate the CPU from input/output ports
    ____ 13. Allen-Bradley industrial controllers are grouped as ____.
    A. Programmable Logic Controllers
    B. Programmable Automation Controllers
    C. Safety Programmable Controllers
    D. All of the above.
    ____ 14. Which of the following method(s) may be used to program PLCs?
    A. Ladder Logic Diagram (LLD) programming
    B. Function block programming
    C. Text programming
    D. All of the above.
    ____ 15. Which of the following statements is false?
    A. All Allen-Bradley PLCs have power supply and central processing units
    B. All Allen-Bradley PLCs have Analog-To-Digital (ADC) and Digital-To-Analog (DAC)
    Ports
    C. All Allen-Bradley PLCs have discrete input/output ports
    D. All Allen-Bradley PLCs have communication channels
    ____ 16. Allen-Bradley PLC’s backplane delivers ____.
    A. only power to input/output modules
    B. power and communication signals to input/output modules
    C. only communication signals to input/output modules
    D. All of the above.
    ____ 17. A discrete PLC output module can be connected to ____.
    A. sensors
    Page 3 of 5

    B. pilot lights, solenoids, or motors


    C. the computer
    D. All of the above.
    ____ 18. Which of the following statement(s) is true?
    A. The input layout has an octal transceiver.
    B. The input port layout has a rectifier.
    C. The input port layout has a Zener diode.
    D. All of the above.
    ____ 19. Which of the following statements is false?
    A. The output port layout has an optoisolator.
    B. The output port converts digital signal to analog signal.
    C. The output port layout always requires two octal latches.
    D. None of the above.
    ____ 20. Which Rockwell Automation software can be used to program one or more Allen-Bradley PLC or PAC
    devices?
    A. RS Logix 500
    B. RS Logix 5000
    C. RS Linx
    D. Both A and B.
    ____ 21. Which of the following industrial controllers has the most features?
    A. PLC
    B. PAC
    C. DCS
    D. RTU
    ____ 22. If all the units are in one enclosure, the PLC is called a ____ PLC.
    A. modular
    B. fixed
    C. discrete
    D. None of the above.
    ____ 23. The four major components of a PLC power supply are a line conditioner or varistor, transformer/rectifier
    unit, RC filter, and ____.
    A. valve
    B. fixed PLC
    C. Zener diode
    D. microprocessor
    ____ 24. A(n) ____ is a unidirectional semiconductor device that can maintain a steady voltage level.
    A. Zener diode
    B. optoisolator
    C. flip-flop
    D. full-wave rectifier
    ____ 25. A(n) ____ converts the digital output signals to analog signals.
    A. bus
    B. register
    C. ADC
    D. DAC
    Page 4 of 5

    True/False
    Indicate whether the statement is true or false.

    ____ 26. One benefit of PLCs over electromechanical relay logic systems is PLCs require minor wiring and can be
    modified and reprogrammed within a few hours.

    ____ 27. Static RAM (SRAM) stores data in the form of charge on capacitors.

    ____ 28. Read only memory (ROM) holds the permanent system program.

    ____ 29. The arithmetic logic unit (ALU) carries out math and logic instructions.

    ____ 30. Microprocessor units (MPUs) use an octal transceiver to enable ROM, RAM, I/O port devices, and support
    chips.

    Completion
    Complete each statement.

    31. EEPROM is an acronym for ______________________________.

    32. EPROM is an acronym for ______________________________.

    33. SRAM is an acronym for ______________________________.

    34. DRAM is an acronym for ______________________________.

    35. Ports that are either open (off) or closed (on) are ______________________________ input ports.

    36. Output ports that are either energized (on) or de-energized (off) are ______________________________
    output ports.

    37. TTL is an acronym for ______________________________.

    38. The ______________________________ in the microprocessor is used to carry out math and logic
    instructions.

    39. A(n) ______________________________-based microprocessor uses several math instructions to carry out
    complex commands.

    40. A(n) ______________________________-based microprocessor typically uses only one instruction for a
    complex command.

    41. A(n) ______________________________ converts the analog input signals to binary digital signals.

    42. A(n) ______________________________ converts the digital output signals back to analog signals.

    43. SLC is an acronym for ______________________________.


    Page 5 of 5

    44. SRAM uses a(n) ______________________________ to hold a data bit.

    45. A(n) ______________________________ diode is a semiconductor device that can maintain a steady voltage
    level.

    46. To physically isolate the CPU from the input device, a(n) ______________________________ is used to
    input the DC signal to the CPU board.

    47. The use of ______________________________ enables a microprocessor to communicate with I/O devices.

    48. UVEPROM is an acronym for ______________________________.

    49. A(n) ______________________________ is a sequential digital device that generates a different output for
    every input on the next clock pulse.

    50. BIOS is an acronym for ______________________________.

    51. The MPU uses ______________________________ memory to speed up the data transfer while it is
    executing a program.

    52. The software that resides in ROM is called ______________________________.

    53. A microprocessor unit (MPU) uses a(n) ______________________________ to enable ROM, RAM, I/O port
    devices, and support chips.
    Page 6 of 5

    You might also like