PLC, RELAY, BASIC WIRING Quiz Practice Quiz | PLC,…

Q: What does PLC stand for?

Programmable Logic Controller — PLC is the acronym for Programmable Logic Controller, used in automation.

Q: What is the primary function of a relay?

To switch a high-power circuit using a low-power signal — Relays act as electrically operated switches, controlling high power with low power.

Q: Which of the following is NOT a common component found in a PLC?

Resistor Network — Resistor networks are not a core component of PLC. CPU, input/output modules are.

Q: What is the symbol commonly used to represent a normally open (NO) contact in a ladder diagram?

|-| — The symbol for normally open contact in ladder diagrams is a line with two vertical dashes: -| |-

Q: What is the purpose of an input module in a PLC?

To receive signals from sensors and devices — Input modules receive signals from sensors and field devices like switches and sensors.

Q: What is the unit of measurement for voltage?

Volt (V) — Voltage is measured in Volts, representing electrical potential difference.

Q: Which component is often used to isolate the PLC from high-voltage circuits?

Relay — Relays provide electrical isolation between control and load circuits.

Q: In a PLC, what is an output module used for?

To control external devices like motors and lights — Output modules control devices like motors and lights, based on the PLC program.

Q: What is the purpose of a fuse in an electrical circuit?

To protect the circuit from overcurrent — Fuses are designed to break the circuit if excessive current flows, protecting it.

Q: Which of the following wiring methods is typically used for connecting field devices to a PLC?

Point-to-point wiring — Point-to-point wiring is commonly used to ensure each device has its own connection.

Question 1 of 10

What does PLC stand for?

PLC is the acronym for Programmable Logic Controller, used in automation.

Question 2 of 10

What is the primary function of a relay?

Relays act as electrically operated switches, controlling high power with low power.

Question 3 of 10

Which of the following is NOT a common component found in a PLC?

Resistor networks are not a core component of PLC. CPU, input/output modules are.

Question 4 of 10

What is the symbol commonly used to represent a normally open (NO) contact in a ladder diagram?

The symbol for normally open contact in ladder diagrams is a line with two vertical dashes: -| |-

Question 5 of 10

What is the purpose of an input module in a PLC?

Input modules receive signals from sensors and field devices like switches and sensors.

Question 6 of 10

What is the unit of measurement for voltage?

Voltage is measured in Volts, representing electrical potential difference.

Question 7 of 10

Which component is often used to isolate the PLC from high-voltage circuits?

Relays provide electrical isolation between control and load circuits.

Question 8 of 10

In a PLC, what is an output module used for?

Output modules control devices like motors and lights, based on the PLC program.

Question 9 of 10

What is the purpose of a fuse in an electrical circuit?

Fuses are designed to break the circuit if excessive current flows, protecting it.

Question 10 of 10

Which of the following wiring methods is typically used for connecting field devices to a PLC?

Point-to-point wiring is commonly used to ensure each device has its own connection.

PLC, RELAY, BASIC WIRING Quiz