Deck 25: Programmable Logic Controllers and Start-Stop Push Button Control

Question 1

The PLC is a special type of computer designed to perform a special function.

Answer 1

True

Question 2

The number of internal relays and timers contained in a PLC is determined by the physical size of the computer.

Answer 2

False

Question 3

The ____ is the "brains" of the programmable logic controller.

A) power supply
B) program loader
C) CPU
D) I/O

Answer 3

CPU

Question 4

The programming terminal, or ____________________ terminal, is used to program the CPU.

Question 5

Line isolation is generally provided in one of two ways. The most popular is with ____________________ isolation.

Question 6

What are the four primary parts of programmable logic controllers?

Question 7

Discuss I/O capacity.

Question 8

The overload contact must be connected in such a manner that it will cause the output of the circuit to turn off if it opens.

Question 9

When gates are used, their inputs must be connected to a definite high or low.

Question 10

A circuit that can be turned on with one push button and turned off with another can be constructed with ____ gate(s).

A) an AND and an OR
B) two AND
C) an INVERTER and a NAND
D) two NAND

Question 11

The push button can be adapted to produce a high at the input instead of a low by adding a(n) ____.

A) OR
B) NOR
C) NAND
D) INVERTER

Question 12

When the input of the INVERTER becomes low, its output becomes ____________________.

Question 13

What happens when a basic stop-start, push-button circuit is used with an electronic control system?

Question 14

What will happen if the motor is overloaded in a basic stop-start, push-button circuit with overload protection?