JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV PC BASED INSTRUMENTATION Previous Question Paper (November/December - 2018 - R15)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
Part A
State the advantages of Solid State Relay.
Answer
Solid State Relays (SSRs) offer high switching speeds, no moving parts (eliminating mechanical wear and contact arcing), silent operation, and long operational life. They also provide complete electrical isolation between the control circuit and the load.
What is the purpose of Parallel I/O ports in Micro processors?
Answer
Parallel I/O ports allow the microprocessor to communicate with external peripherals by transferring multiple bits of data simultaneously over a bus. They serve as the interface for reading data from sensors, switches, or keyboards and writing data to actuators, displays, or indicators, enabling efficient data exchange between the CPU and the outside world.
Define Process Control Computer.
Answer
Sign in to view the complete answer paper.
What are the power supply requirements of PLCs?
Answer
Sign in to view the complete answer paper.
Write down the function of Layer 4 of OSC in network Communication.
Answer
Sign in to view the complete answer paper.
Draw the Analog BCD Input and Output modules.
Answer
Sign in to view the complete answer paper.
What is the purpose of adding rate control to proportional integral control?
Answer
Sign in to view the complete answer paper.
Draw the basic PLC Counter function.
Answer
Sign in to view the complete answer paper.
Name the four high level programming languages competing to become the PLC language.
Answer
Sign in to view the complete answer paper.
Give an example of smart actuator and briefly explain it.
Answer
Sign in to view the complete answer paper.
Part B
Describe the role of Power adapters in driving Continuous actuators with neat circuit diagram.
Answer
Sign in to view the complete answer paper.
Explain with a block diagram the basic structure of a PLC.
Answer
Sign in to view the complete answer paper.
Explain the Scan cycle of PLC with necessary example.
Answer
Sign in to view the complete answer paper.
With a block diagram, explain the concept involved in a data acquisition system.
Answer
Sign in to view the complete answer paper.
Draw a ladder diagram for a three motor system having the following conditions:
- Motor 1 (M1) starts as soon as the start switch is ON.
- After 10 seconds M1 goes OFF and Motor 2 (M2) starts.
- After 5 seconds M2 goes OFF and Motor 3 (M3) starts.
- After 10 seconds M3 goes OFF and M1 starts and cycle is repeated.
Answer
Sign in to view the complete answer paper.
Draw the PLC Input scheme and briefly explain it.
Answer
Sign in to view the complete answer paper.
List the five major types of registers. Use a block diagram to show where each type fits into the PLC scheme of operation.
Answer
Sign in to view the complete answer paper.
Show the distribution of Processing Tasks in a plant according to Function and explain the types of networking in detail.
Answer
Sign in to view the complete answer paper.
Describe the salient features of analog PLC operations.
Answer
Sign in to view the complete answer paper.
Explain the application of Master Control Relay function.
Answer
Sign in to view the complete answer paper.
Describe the use of PLC in Continuous bottle filling system with neat figure.
Answer
Sign in to view the complete answer paper.
Explain the PLC comparison functions with examples.
Answer
Sign in to view the complete answer paper.
Explain with PLC logic the operation of Continuous Bottle-filling system.
Answer
Sign in to view the complete answer paper.
Explain the structure and operation of Smart valves.
Answer
Sign in to view the complete answer paper.
Describe the effects of line transients over PLC operation.
Answer
Sign in to view the complete answer paper.
How is HART Protocol different from other protocols? Explain.
Answer
Sign in to view the complete answer paper.
Write short notes on Smart transmitters.
Answer
Sign in to view the complete answer paper.