This set of Flexible Manufacturing System Multiple Choice Questions & Answers (MCQs) focuses on “Types of DNC Communication Systems”.
1. Which of the following do not come under the category of DNC Communication system?
a) RS-232 based DNC
b) Nodular based DNC
c) Terminal based DNC
d) Network based DNC
View Answer
Explanation: Nodular based DNC does not come under the category of communication system used in Distributed Numerical Control System. RS232, Terminal and Network based systems are the communications systems used in DNC.
2. What do RS in RS-232 communication system mean?
a) Repeated Specimen
b) Recommended Standard
c) Repeated Standard
d) Reversed Specimen
View Answer
Explanation: The term RS in RS-232 communication system mean Recommended Standard. RS-232 is a standard for serial communication transmission of data. It is typically used in the field of telecommunications.
3. Which cables are used in RS-232 based DNC communication system?
a) Copper or Fiber Optic
b) Gold
c) Platinum
d) Plastic
View Answer
Explanation: Copper or Fiber optic cables are typically used in RS-232 based DNC communication system. It is equipped with serial multiple interfaces card and connected to CNC controllers through RS-232.
4. RS-232 communication based DNC systems are typically used for large layouts where the computers are located far away from one another.
a) False
b) True
View Answer
Explanation: RS-232 communication based DNC systems are used in small companies where computers are located ideally less than 15 m. It is an outdated technology and several other technologies have replaced this method.
5. Which technique enables the operator to view manufacturing related data and to use the terminal to load the program?
a) Terminal based DNC
b) RS-232 based DNC
c) Sonar based DNC
d) Network based DNC
View Answer
Explanation: In order to use the terminal to load the program and enable the operator to view manufacturing related data, Terminal based DNC systems are used. It is expensive and advanced models allow editing of part programs.
6. Which DNC communication system replaced conventional Ethernet cabling?
a) Network based DNC
b) Radar based DNC
c) Terminal based DNC
d) RS-232 based DNC
View Answer
Explanation: Conventional Ethernet cabling has been today replaced completely by Network based DNC communication system. It is safe to use this technique for transferring data over large distance and also has high transferring speed.
7. Which of the following do the network based DNC systems use for data transfer?
a) Antennas
b) Network Adapters
c) Transmitters
d) Receivers
View Answer
Explanation: The network based DNC systems use Network adapters for transferring data. It has direct access to Numerical Control programs without terminals. Numerical Control programs can be accessed directly without any intervening terminals.
8. What does WLAN mean in Network based DNC systems?
a) Wireless Local Area Network
b) Wired Locomotive Area Network
c) Without Locomotive Area Network
d) With Land Area Network
View Answer
Explanation: WLAN means Wireless Local Area Network in network based Distributed Numerical Control Communication system. It is easily comfortable and easy to operate and is suitable for both large and small scale industries.
9. Wireless Local Area Network operates in Nanohertz range.
a) True
b) False
View Answer
Explanation: Wireless Local Area Network operates in Giga hertz range. It is used to transfer data without any direct cable connection. The bandwidth used in these applications is quite larger and hence larger data can be transferred at optimized speed.
10. Which forms the bridge between cable network and wireless network?
a) Simulation Point
b) Collinear Point
c) Modular Point
d) Access Point
View Answer
Explanation: Access point acts as a bridge between the cable network and the wireless network. It has transmitter and receiver which is used to transfer and receive signals. It can also be used to connect two cable networks.
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