Q1. A 4-bit register would be formed by using _______________.

A. Four internal relays B. Single Internal Relay C. Two Internal Relays. D. 8 Internal Relays

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Four internal relays. This matches the principle or definition described in the question.

Q2. A 8 -bit register would be formed by using _______________.

A. Four internal relays B. Single Internal Relay C. Two Internal Relays. D. 8 Internal Relays

Check Answer

Correct Answer: D   |   Marks: 1

Explanation: Correct answer: D. 8 Internal Relays. This matches the principle or definition described in the question.

Q3. A digital controller is a type of controller that uses which type of signals to control a system.

A. Digital Signal B. Analogue Signals C. Sinusoidal Signals D. Random Signals

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Digital Signal. This matches the principle or definition described in the question.

Q4. A PD controller reduces the______________

A. Overshoot and oscillations in the output of the system. B. Time-invariant error and lags the output phase. C. Rise time and eliminating the steady state error. D. Rise time, overshoot, and oscillations in the plant.

Check Answer

Correct Answer: D   |   Marks: 1

Explanation: Correct answer: D. Rise time, overshoot, and oscillations in the plant. This matches the principle or definition described in the question.

Q5. A PI controller allows for reducing the______________

A. Overshoot and oscillations in the output of the system. B. time-invariant error and lags the output phase. C. Rise time and eliminating the steady state error. D. Rise time, overshoot, and oscillations in the plant.

Check Answer

Correct Answer: C   |   Marks: 1

Explanation: Correct answer: C. Rise time and eliminating the steady state error. This matches the principle or definition described in the question.

Q6. A proportional controller is used to control the height of water in a tank where the water level can vary from 0 to 4.0 m. The required height of water is 3.5 m and the controller is to close a valve fully when the water rises to 3.9 m and open it fully when the water falls to 3.1 m. the transfer function of the system is ____________

A. 2 B. 3 C. 0 D. 5

Check Answer

Correct Answer: D   |   Marks: 1

Explanation: Correct answer: D. 5. This matches the principle or definition described in the question.

Q7. A proportional controller is used to control the height of water in a tank where the water level can vary from 0 to 4.0 m. The required height of water is 3.5 m and the controller is to close a valve fully when the water rises to 3.9 m and open it fully when the water falls to 3.1 m. the Praportional band of the sysetm is ____________

A. Varies from 0 to 10 % B. Varies from -10 % to + 10% C. varies from -10 % to 0 D. 10 %

Check Answer

Correct Answer: B   |   Marks: 1

Explanation: Correct answer: B. Varies from -10 % to + 10%. This matches the principle or definition described in the question.

Q8. A two-position mode controller switches on a room heater when the temperature falls to 20°C and off when it reaches 24°C. When the heater is on, the air in the room increases in temperature at the rate of 0.5°C per minute; when the heater is off, it cools at 0.2°C per minute. If the time lags in the control system are negligible,  the time required the system so that the heater switching off to on is _________________

A. 8 minutes B. 20 minutes C. 10 minutes D. 5 minutes

Check Answer

Correct Answer: B   |   Marks: 1

Explanation: Correct answer: B. 20 minutes. This matches the principle or definition described in the question.

Q9. A two-position mode controller switches on a room heater when the temperature falls to 20°C and off when it reaches 24°C. When the heater is on, the air in the room increases in temperature at the rate of 0.5°C per minute; when the heater is off, it cools at 0.2°C per minute. If the time lags in the control system are negligible, what will be the times taken for  the heater switching on to off.

A. 8 minutes B. 4 minutes C. 20 minutes D. 10 minutes

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. 8 minutes. This matches the principle or definition described in the question.

Q10. A velocity controller is a type of controller that is used to control the ____________________.

A. Velocity of a system. B. Displacement of the System. C. Acceleration of the System. D. Error of the system.

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Velocity of a system. This matches the principle or definition described in the question.

Q11. Closed loop controllers are required to work based on  ___________________

A. Error Signal B. Set point Input C. Set Point Output D. Correction Element.

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Error Signal. This matches the principle or definition described in the question.

Q12. Compare to Micro controller the size of PLC is _____________

A. Big B. Small C. Equal D. Cannot judge

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Big. This matches the principle or definition described in the question.

Q13. Digital controllers are typically based on _____________________, which are used to implement the control algorithms.

A. Microprocessors B. Microcontrollers C. microprocessors or microcontrollers, D. Sensors or Actuators

Check Answer

Correct Answer: C   |   Marks: 1

Explanation: Correct answer: C. microprocessors or microcontrollers,. This matches the principle or definition described in the question.

Q14. How can you achieve a repeating cycle using a single TON timer in a PLC program?

A. By using a feedback loop with the timer's output B. By continuously resetting the timer C. By using the timer in conjunction with a counter D. By setting the timer's preset value to zero

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. By using a feedback loop with the timer's output. This matches the principle or definition described in the question.

Q15. How do PLC process input and Out put signals?

A. By using a central processing unit (CPU) B. By using a micro controller C. By using a microprocessor D. By using a memory chip

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. By using a central processing unit (CPU). This matches the principle or definition described in the question.

Q16. How does a plc differ from a traditional hardwired control system?

A. PLCs use software programming instead of physical wiring. B. PLCs can only be used in industrial applications. C. PLCs are more expensive than traditional hardwired control systems. D. PLCs are less reliable than traditional hardwired control systems.

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. PLCs use software programming instead of physical wiring. This matches the principle or definition described in the question.

Q17. How many types of the counter are there in PLC?

A. 2 B. 3 C. 4 D. 5

Check Answer

Correct Answer: B   |   Marks: 1

Explanation: Correct answer: B. 3. This matches the principle or definition described in the question.

Q18. in case of PLC ladder Programming The Horizontal lines  are called ________________

A. Power rails B. Rungs C. Timers D. Counters

Check Answer

Correct Answer: B   |   Marks: 1

Explanation: Correct answer: B. Rungs. This matches the principle or definition described in the question.

Q19. In case of PLC ladder Programming The Vertical Lines are called ________________

A. Power rails B. Rungs C. Timers D. Counters

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Power rails. This matches the principle or definition described in the question.

Q20. In Case of Two step controller the action of the controller is

A. Discontinuous B. Continuous C. Proportional D. Cannot Say

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Discontinuous. This matches the principle or definition described in the question.

Q21. In PLC Ladder Programming AND logic circuit represents the ________________.

A. Parallel Circuit. B. Series Circuit C. a Combination of Parallel and Series D. Cannot Say

Check Answer

Correct Answer: B   |   Marks: 1

Explanation: Correct answer: B. Series Circuit. This matches the principle or definition described in the question.

Q22. In PLC Ladder Programming OR logic circuit represents the ________________.

A. Parallel Circuit. B. Series Circuit C. a Combination of Parallel and Series D. Cannot Say

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Parallel Circuit. This matches the principle or definition described in the question.

Q23. In which type of Controller the rate of Change of Controller output is Directly proportional to Error Signal

A. Proportional mode B. Derivative Mode C. Integral Mode D. On- Off Control Mode

Check Answer

Correct Answer: C   |   Marks: 1

Explanation: Correct answer: C. Integral Mode. This matches the principle or definition described in the question.

Q24. In which type of Controller the size of the controller output is directly proportional to the rate of change of Error.

A. Proportional mode B. Derivative Mode C. Integral Mode D. On- Off Control Mode

Check Answer

Correct Answer: B   |   Marks: 1

Explanation: Correct answer: B. Derivative Mode. This matches the principle or definition described in the question.

Q25. In which type of Controller the size of the controller output is directly proportional to the size of the error

A. Proportional mode B. Derivative Mode C. Integral Mode D. On- Off Control Mode

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Proportional mode. This matches the principle or definition described in the question.

Q26. Integral  Time constant is the ratio of ________________

A. Kp/  Kd B. Kd / Kp C. Kp * Kd D. Kp / Ki

Check Answer

Correct Answer: D   |   Marks: 1

Explanation: Correct answer: D. Kp / Ki. This matches the principle or definition described in the question.

Q27. NAND is a combination of_______________________

A. "AND" and  "OR"  Logic Gates B. "AND" and  "NOT"  logic gates C. only AND Logic gates D. "AND" and "XOR" gates

Check Answer

Correct Answer: B   |   Marks: 1

Explanation: Correct answer: B. "AND" and  "NOT"  logic gates. This matches the principle or definition described in the question.

Q28. NOR Logic Gate is a combination of_______________________

A. "AND" and  "OR"  Logic Gates B. "AND" and  "NOT"  logic gates C. only AND Logic gates D. "OR" and  "NOT"  logic gates

Check Answer

Correct Answer: D   |   Marks: 1

Explanation: Correct answer: D. "OR" and  "NOT"  logic gates. This matches the principle or definition described in the question.

Q29. NOT gate is composed of ________________________

A. Single input and a single output. B. Single input and a Multi output. C. Multi input and a single output. D. Single input with out any output

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Single input and a single output. This matches the principle or definition described in the question.

Q30. OFF delay timers are maintained as ON for a fixed time of delay period before ____________.

A. Turning off B. Turning ON C. Turning On and Off D. Cannot Say

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Turning off. This matches the principle or definition described in the question.

Q31. PID controller is the combination of ______________

A. Proportional mode only. B. Proportional with Derivative mode only. C. Proportional with Integral only D. Proportional + Integral + Derivative type

Check Answer

Correct Answer: D   |   Marks: 1

Explanation: Correct answer: D. Proportional + Integral + Derivative type. This matches the principle or definition described in the question.

Q32. PLC Stands for ____________________

A. Programmable Logic Controller B. Processing Logic Controller C. Programming controller D. Processor with control logic

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Programmable Logic Controller. This matches the principle or definition described in the question.

Q33. RAM is also known as____________

A. Read-only memory B. Read-write memory C. Sequential access memory D. Secondary memory

Check Answer

Correct Answer: B   |   Marks: 1

Explanation: Correct answer: B. Read-write memory. This matches the principle or definition described in the question.

Q34. Ripple counters are also called ____________

A. SSI counters B. Asynchronous counters C. Synchronous counters D. VLSI counters

Check Answer

Correct Answer: B   |   Marks: 1

Explanation: Correct answer: B. Asynchronous counters. This matches the principle or definition described in the question.

Q35. ROM is also known as____________

A. Read-only memory B. Read-write memory C. Sequential access memory D. Secondary memory

Check Answer

Correct Answer: B   |   Marks: 1

Explanation: Correct answer: B. Read-write memory. This matches the principle or definition described in the question.

Q36. Several internal relays can be grouped together to form a ____________.

A. Register B. Internal Relay C. Latching D. Sequencing

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Register. This matches the principle or definition described in the question.

Q37. The cascading timers are linked together to give __________________which is easily achieved than just one timer.

A. Longer delay times B. Shorter delay times C. Zero in delay D. Cannot able to say.

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Longer delay times. This matches the principle or definition described in the question.

Q38. The controller receives inputs from_______________, executes control programs and provides the output to the ___________ elements.

A. Sensors, Actuators B. Sensors, Correction Element C. Actuators, Correction Element D. Sensors, Controllers

Check Answer

Correct Answer: B   |   Marks: 1

Explanation: Correct answer: B. Sensors, Correction Element. This matches the principle or definition described in the question.

Q39. The difference between the set point value to the actual value of the system is called _____________

A. Steady State Error B. Lag C. Error Signal D. Correction Element

Check Answer

Correct Answer: C   |   Marks: 1

Explanation: Correct answer: C. Error Signal. This matches the principle or definition described in the question.

Q40. The difference between the set value input and output after all transient responses died away is called ____________

A. Steady State Error B. Lag C. Error Signal D. Correction Element

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Steady State Error. This matches the principle or definition described in the question.

Q41. The register is a type of ___________

A. Sequential circuit B. Combinational circuit C. CPU D. Latches

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Sequential circuit. This matches the principle or definition described in the question.

Q42. The Transfer function of Derivative controller is _____________

A. Kp B. Kd*s C. Ki / s D. Kp + Kd * s+ Kp / s

Check Answer

Correct Answer: B   |   Marks: 1

Explanation: Correct answer: B. Kd*s. This matches the principle or definition described in the question.

Q43. The Transfer function of Integral controller is _____________

A. Kp B. Kd*s C. Ki / s D. Kp + Kd * s+ Ki / s

Check Answer

Correct Answer: C   |   Marks: 1

Explanation: Correct answer: C. Ki / s. This matches the principle or definition described in the question.

Q44. The Transfer function of PD Controller is _____________

A. Kp - Kd*s B. Kp +( Kd / s) C. Ki / s D. Kp + Kd * s+ Ki / s

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Kp - Kd*s. This matches the principle or definition described in the question.

Q45. The Transfer function of PI Controller is _____________

A. Kp - Kd*s B. Kp + ( Kd / s) C. Ki / s D. Kp + Ki / s

Check Answer

Correct Answer: D   |   Marks: 1

Explanation: Correct answer: D. Kp + Ki / s. This matches the principle or definition described in the question.

Q46. The Transfer function of PID  Controller is _____________

A. Kp - Kd*s B. Kp + Kd C. Ki / s D. Kp + Ki / s + Kd*s

Check Answer

Correct Answer: D   |   Marks: 1

Explanation: Correct answer: D. Kp + Ki / s + Kd*s. This matches the principle or definition described in the question.

Q47. The Transfer function of proportional controller is _____________

A. Kp B. Kd*s C. Ki / s D. Kp + Kd * s+ Kp / s

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Kp. This matches the principle or definition described in the question.

Q48. TP is used to denote __________________ type of Timers.

A. Dealy Off B. Delay ON C. Pulse Timers D. Cascade Timers

Check Answer

Correct Answer: C   |   Marks: 1

Explanation: Correct answer: C. Pulse Timers. This matches the principle or definition described in the question.

Q49. Transfer function of the Proportional Controller ( P Types) is _____________

A. 100 % / Proportional Band B. Proportional Band / 100 % C. Proportional Band * 100 D. 100 / Proportional Band

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. 100 % / Proportional Band. This matches the principle or definition described in the question.

Q50. Velocity controllers are typically used in applications where it is important to maintain a ______________, such as in robotics and machine control.

A. Constant velocity B. Increase the velocity praportionally. C. Decrease the velocity of the sysetm. D. Infinite Velocity

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Constant velocity. This matches the principle or definition described in the question.

Q51. What is the function of a plc’s data logging?

A. To store data from the industrial process B. To store the PLC’s configuration settings C. To record data over a period of time D. To process data in real-time

Check Answer

Correct Answer: C   |   Marks: 1

Explanation: Correct answer: C. To record data over a period of time. This matches the principle or definition described in the question.

Q52. What is the main function of the CPU in a plc?

A. To provide power to the PLC B. To store the program C. To execute the program and control the input and output devices D. To communicate with other PLCs

Check Answer

Correct Answer: C   |   Marks: 1

Explanation: Correct answer: C. To execute the program and control the input and output devices. This matches the principle or definition described in the question.

Q53. What is the maximum number of states for a 4-bit ripple counter?

A. 4 B. 8 C. 32 D. 16

Check Answer

Correct Answer: D   |   Marks: 1

Explanation: Correct answer: D. 16. This matches the principle or definition described in the question.

Q54. What is the primary function of a counter in a digital system?

A. To store data B. To count events or clock pulses C. To convert analog to digital signals D. To regulate system pressur

Check Answer

Correct Answer: B   |   Marks: 1

Explanation: Correct answer: B. To count events or clock pulses. This matches the principle or definition described in the question.

Q55. Which of the following are the main components of a PLC SYSTEM?

A. CPU, memory, and input/output modules B. Sensors, actuators, and control valves C. Motors, gears, and bearings D. Pneumatic s, hydraulics, and electronics

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. CPU, memory, and input/output modules. This matches the principle or definition described in the question.

Q56. Which of the following elements are act as the inputs and outputs in a plc system?

A. Sensors and actuators B. Motors and gears C. Valves and pumps D. Programs and data

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Sensors and actuators. This matches the principle or definition described in the question.

Q57. Which of the following is considered a volatile memory?

A. ROM B. RAM C. EEPROM D. Flash Memory

Check Answer

Correct Answer: B   |   Marks: 1

Explanation: Correct answer: B. RAM. This matches the principle or definition described in the question.

Q58. Which of the following is not a data handling operations in PLC?

A. Data movement B. Data comparisons C. Code conversions D. Arithmetic operations

Check Answer

Correct Answer: D   |   Marks: 1

Explanation: Data handling operations in PLCs include data movement, data comparisons, and code conversions. Arithmetic operations are used for mathematical calculations, not specifically for data handling.

Q59. Which of the following is not a Digital Electronic device?

A. Micro Processor B. Micro controller C. PLC D. SCADA

Check Answer

Correct Answer: D   |   Marks: 1

Explanation: Correct answer: D. SCADA. This matches the principle or definition described in the question.

Q60. Which of the following is the difference between A PLC and A DCS?

A. PLCs are used to control machines while DCSs are used to control entire plants B. PLCs are used to control machines while DCSs are used to control networks C. PLCs are used to control machines while DCSs are used to control buildings D. PLCs are used to control machines while DCSs are used to control vehicles

Check Answer

Correct Answer: D   |   Marks: 1

Explanation: Correct answer: D. PLCs are used to control machines while DCSs are used to control vehicles. This matches the principle or definition described in the question.

Q61. Which of the Following is the Full Form of EEPROM?

A. Electrically Erasable Programmable Read-only Memory B. Erasable Programmable Read-only Memory C. Programmable Read-only Memory D. Read-only Memory

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. Electrically Erasable Programmable Read-only Memory. This matches the principle or definition described in the question.

Q62. Which of the Following is the Full Form of EPROM?

A. Electrically Erasable Programmable Read-only Memory B. Erasable Programmable Read-only Memory C. Programmable Read-only Memory D. Read-only Memory

Check Answer

Correct Answer: B   |   Marks: 1

Explanation: Correct answer: B. Erasable Programmable Read-only Memory. This matches the principle or definition described in the question.

Q63. Which of the Following is the Full Form of PROM?

A. Electrically Erasable Programmable Read-only Memory B. Erasable Programmable Read-only Memory C. Programmable Read-only Memory D. Read-only Memory

Check Answer

Correct Answer: C   |   Marks: 1

Explanation: Correct answer: C. Programmable Read-only Memory. This matches the principle or definition described in the question.

Q64. Which of the following is the Full form of SCADA in relations to PLC SYSTEMS?

A. Secure Control and Data Access B. System Control and Data Acquisition C. Supervisory Control and Digital Acquisition D. Supervisory Control and Data Acquisition

Check Answer

Correct Answer: D   |   Marks: 1

Explanation: Correct answer: D. Supervisory Control and Data Acquisition. This matches the principle or definition described in the question.

Q65. Which of the following is the main difference between A PLC & Micro Controller?

A. PLCs are used for industrial automation while micro controllers are used for consumer electronics B. PLCs are used for industrial automation while micro controllers are used for computer peripherals C. PLCs are used for industrial automation while micro controllers are used for robotics D. PLCs are used for industrial automation while micro controllers are used for automotive systems

Check Answer

Correct Answer: D   |   Marks: 1

Explanation: Correct answer: D. PLCs are used for industrial automation while micro controllers are used for automotive systems. This matches the principle or definition described in the question.

Q66. Which of the following is the role of Input Module of PLC?

A. To read input signals from sensors B. To send output signals to actuators C. To store data from the industrial process D. To execute the control program

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. To read input signals from sensors. This matches the principle or definition described in the question.

Q67. Which of the following is the role of PLC’S LADDER LOGIC?

A. To create and edit the control program B. To test and debug the control program C. To represent the control program in a graphical format D. To detect and troubleshoot hardware errors

Check Answer

Correct Answer: C   |   Marks: 1

Explanation: Correct answer: C. To represent the control program in a graphical format. This matches the principle or definition described in the question.

Q68. Which of the following is the role of The Input/Output (I/O) module in A PLC?

A. To provide power to the PLC. B. To store the program. C. To interface with the input and output devices. D. To communicate with other PLCs.

Check Answer

Correct Answer: C   |   Marks: 1

Explanation: Correct answer: C. To interface with the input and output devices. This matches the principle or definition described in the question.

Q69. Which of the following statement is correct related to PLC?

A. A type of controller used for industrial automation. B. A type of robot used for industrial automation. C. A type of sensor used for industrial automation. D. A type of software used for industrial automation.

Check Answer

Correct Answer: A   |   Marks: 1

Explanation: Correct answer: A. A type of controller used for industrial automation. This matches the principle or definition described in the question.