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WorksheetsPLC part 2
Total questions: 11
Worksheet time: 6mins
Câu 140: The address bus is used ......................the addresses of memory locations.
carries
carry
to carry
carried
Câu 141: What is the function of System Read-Only-Memory (ROM) in a PLC system?
To provide permanent storage for the operating system and fixed data used by the CPU
To store user programs
To maintain RAM contents in case of power loss
To store input and output data
Câu 142: What type of memory is used for the user's program in a PLC system?
System Read-Only-Memory (ROM)
Random-Access Memory (RAM)
Erasable and Programmable Read-Only-Memory (EPROM)
Temporary buffer store
Câu 143: The term PLC stands for
Personal logic computer
Programmable local computer.
Programmable logic controller.
Personal logic controller.
Câu 144: Decide whether each of these statements is True (T) or False (F). A transistor output channel from a PLC: (i) Is used for only d.c. switching. (ii) Is isolated from the output load by an optocoupler. Which option BEST describes the two statements?
(i) F (ii) F
(i) T (ii) F
(i) F (ii) T
(i) T (ii) T
Câu 145: A transistor output channel from a PLC: (i) Is used for only d.c. switching. (ii) Is isolated from the output load by an optocoupler. Which option BEST describes the two statements?
(i) F (ii) T
(i) T (ii) F
(i) T (ii) T
(i) F (ii) F
Câu 146: The term sensor is used for an input device that .......................a usable output in response to a specified physical input
Provide
Provides
Providing
to provide
Câu 147: The term transducer ..............generally ............for a device that converts a signal from one form to a different physical form
are/used
is/using
is/used
are/using
Câu 148: This chapter provides a brief consideration of typical .....................and ....................... devices used with PLCs.
Electrical, mechanical
Mechanical, digital
Programming, control
Input, output
Câu 149: The term ........................... is used for an input device that provides a usable output in response to a specified physical input.
Sensor
Actuator
Encoder
Motor
Câu 150: What must be done to analogue signals before inputting them to PLC ports?
Amplify
Convert to digital
Filter
Transmit wirelessly
