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1 Unit MCQ LDCS

This document contains 20 multiple choice questions about data loggers, data acquisition systems, SCADA systems, and digital control systems. Some key points covered include: - Data loggers are portable, battery-powered devices that record data using microprocessors. They are similar to chart recorders. - Digital acquisition systems are used when bandwidth is low and for lower accuracy applications. They represent discrete events using integer variables. - SCADA systems have multiple levels and components like database servers, I/O systems, HMIs but not sparger controllers. The heart is the HMI. They perform functions like data acquisition, communication, and control. - RTUs interface between field sensors and the SCADA network

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Gopalakrishnan.G MEC-AP/ECE
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879 views3 pages

1 Unit MCQ LDCS

This document contains 20 multiple choice questions about data loggers, data acquisition systems, SCADA systems, and digital control systems. Some key points covered include: - Data loggers are portable, battery-powered devices that record data using microprocessors. They are similar to chart recorders. - Digital acquisition systems are used when bandwidth is low and for lower accuracy applications. They represent discrete events using integer variables. - SCADA systems have multiple levels and components like database servers, I/O systems, HMIs but not sparger controllers. The heart is the HMI. They perform functions like data acquisition, communication, and control. - RTUs interface between field sensors and the SCADA network

Uploaded by

Gopalakrishnan.G MEC-AP/ECE
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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UNIT-1 LDCS

QUESTION BANK

1. Which of the following is not correct for data loggers?


a) Portability
b) Battery less
c) Small
d) All of the mentioned
2. Data loggers contains microprocessor.
a) True
b) False
3. Which of the following devices are similar to electronic data loggers?
a) Chart recorders
b) Flip flop
c) Memory
d) None of the mentioned
4. Which of the following statement is false?
a) All data loggers are data acquisition system
b) All data acquisition systems are data loggers
c) Data logger and Data acquisition systems are same is operation
d) All of the mentioned
5. Which of the following act as end devices in the pneumatic system?
a) Bourden tubes
b) Mechanical gears
c) Electronic devices
d) All of the mentioned
6. What are auxiliary equipments?
a) equipments
b) guard rings
c) devices
d) voltage source
7. What is a digital recorder?
a) records digital data
b) records analog data
c) does not record data
d) records both analog and digital data
8. For lower accuracies _________
a) digital acquisition system is used
b) both digital and analog acquisition systems are used
c) analog acquisition system is used
d) mechanical data acquisition system is sued
9. Digital acquisition systems are used when _________
a) bandwidth is high
b) bandwidth is medium
c) bandwidth is zero
d) bandwidth is low
10. Transducer produces a _________
a) proportional current
b) proportional voltage
c) proportional resistance
d) proportional power

11. Many digital control systems utilize Ethernet as a communications network, because . . .
(A) No terminating resistors are necessary
(B) Speed is not affected by traffic
(C) It is a wireless network standard
(D) It is robust and inexpensive
12. A typical use for an integer variable in a digital control system is:
(A) Representing single switch status
(B) Representing power supply voltage
(C) Counting discrete events
(D) Trigonometric math operations
13. When did Windows become the world standard operating system?
a) 1980s
b) 1990s
c) 1970s
d) 1960s
14. How many levels are present in a complex SCADA system?
a) 3 – levels
b) 5 – levels
c) 4 – levels
d) 6 – levels
15. Which of the following is not the component of a SCADA system?
a) Database server
b) I/O system
c) PLC controller
d) Sparger controller
16. Which of the following is the heart of a SCADA system?
a) PLC
b) HMI
c) Alarm task
d) I/O task
17. A SCADA system performs Data acquisition, Networked data communication,
_________ and Control.
A) Analog to Digital Conversion
B) 4-20mA to HART
C) All the Answers
D) Data representation
18. Sensors and control relays can’t generate or interpret protocol communication, _______ is needed
to provide an interface between the sensors and the SCADA network.
A) Remote Terminal Units (RTUs)
B) All of the Answers
C) Field Instruments
D) HMI
19. Combine communications paths to and from many RTUs into a single bit stream, usually using
time division multiplexing (TDM) or other such bit stream manipulation techniques.
A)Human Machine Interface (HMI)
B) Multiplexers
C) Barrier
D) PLC
20. _______ may employ one or more workstations and can be configured at the workstation or by an
off-line personal computer.

A) RTU
B) Router
C) DCS
D) Gate Way

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