Which of the following is true of a mainframe or central com

Which of the following is true of a mainframe, or central, computer that you may find in an industrial application? It interfaces with manufacturing processes directly. It eliminates any need for system firmware. It does away with most applications software. It receives information from one or more workstations. Multiplexing is a means of in order to channel data. organizing the transmission of signals from many lines onto one line transmitting signals by changing their amplitude, frequency, or phase mixing and transmitting both synchronous and asynchronous signals simultaneously mixing and transmitting both analog and digital signals simultaneously The device shown isolates digital inputs and outputs from machinery grounds by emitting to a phototransistor. visible light X rays infrared sound The primary purpose of interface hardware in an industrial control system is to reduce the processor\'s overhead runtime. provide compatibility between synchronous and asynchronous transmissions. provide a communications link between the MPU and peripheral devices. connect the MPU to its internal registers.

Solution

1) Which of the following is true of a mainframe, or central, computer that you may
find in an industrial application?
A. It inter,faces with manufacturing processes directly.
B. It eliminates any need for system firmware.
C. It does away with most applications software.
D. It receives information from one or more workstations.

Answer:

A) It inter,faces with manufacturing processes directly.

2. Multiplexing is a means of----- in order to channel data.
A. organizing the transmission of signals from many lines onto one line
B. transmitting signals by changing their amplitude, frequency, or phase
C. mixing and transmitting both synchronous and asynchronous signals simultaneously
D. mixing and transmitting both analog and digital signals simultaneously

Answer:

A) organizing the transmission of signals from many lines onto one line.

4. The primary purpose of interface hardware in an industrial control system is to
A. reduce the processor\'s overhead runtime.
B. provide compatibility between synchronous and asynchronous transmissions.
C. provide a communications link between the MPU and peripheral devices.
D. connect the MPU to its internal registers.

Answer:

C) provide a communications link between the MPU and peripheral devices.