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Here’s a comprehensive list of the Top 100 PLC Objective Questions and Answers that will ensure a smooth transition to the next level because the questions have been strategically crafted.
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PLC SCADA MCQ Questions
How many programs may be assigned to 1 task?
A. 1
B. 32
C. 31
D. 33
A. 1
2. What is the name of the memory location where data is stored?
A. Tag
B. Array
C. Element
D. entity
A. Tag
3. What are the 4 different tag types?
A. SINT_DINT_REAL_BOOL
B. Base_Alias_Consumed_Produced
C. Base_Alias_Bool_DINT
D. All of these
B.Base_Alias_Consumed_ProducedTag
4. How many elements are in an array with a tag name of Batch_1 and a data type DINT[4, 6, 3] ?
A. 120
B. 13
C. 72
D. 70
C. 72
5. What are the 3 different types of structures?
A. Single Array_Double Array_Triple Array
B. Predefined_Module-defined_User defined
C. Continious_Periodic_Control
D. None of these
B. Predefined_Module-defined_User defined
6. The members within a structure are addressed by _______.
A. Using the member name and a period followed by the tag name
B. Using the tag name and an underscore mark followed by the member name
C. Using the tag name and a period followed by the member name
D. All of these
C. Using the tag name and a period followed by the member name
7. What is the maximum number of dimensions of an array?
A. 4
B. 3
C. 2
D. 1
B. 3
8. How many elements are in an array with a tag name of Data_5 and a data type DINT [9]?
A. 9
B. 3
C. 27
D. 28
A. 9
9. The process of sequentially reading the inputs_ executing the control program_and updating the outputs is called the __.
A. I/O update
B. Scan cycle
C. Watchdog scanner
D. Update
B. Scan cycle
10. The term CPU architecture refers to the actual configuration __.
A. of the central processing unit and how it is arranged.
B. type of processor used and it’s associated I/O cards.
C. Input / Output memory map.
D. none of these
A. of the central processing unit and how it is arranged.
11. It is to safe to say that, when a field device is ON, the module ‘senses’ that condition because __.
A. of the power provided to the module.
B. of the power provided from the load.
C. of the power provided from the module.
D. None of These
A. of the power provided to the module.
12. Select the answer that is not correct.
A. I/O interfaces provide the physical connection between the PLC and the field input and output devices.
B. PLCs must operate in special temperature-controlled rooms.
C. Applications of PLCs cannot be reduced to a simple cost comparison with the old hardwired relay technology.
D. PLC are reliable systems
B. PLCs must operate in special temperature-controlled rooms.
