Question 1

A(n)  ____ is connected across the ac input to help eliminate any voltage spikes that may occur.

Accepted Answer

A)   rheostat
B)   metal-oxide varistor
C)   avalanche diode
D)   gas tubeE) A) and C)
F) C) and D) B

Question 2

The most popular way to isolate the CPU from the external circuit is through ____.

Accepted Answer

A)   optical isolation
B)   small relays
C)   rheostats
D)   bridge rectifiersE) A) and B)
F) A) and C)

Question 3

In the relay method of isolation, the CPU is isolated through the use of a(n)  ____.

Accepted Answer

A)   LED
B)   laser
C)   electrostatic buildup
D)   magnetic fieldE) C) and D)
F) B) and D)

Question 4

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

Accepted Answer

A)   die
B)   motor
C)   robotic arm
D)   computerE) None of the above
F) C) and D)

Question 5

The ____ is used to connect the CPU to the load.

Accepted Answer

A)   opto-isolator
B)   power supply
C)   input module
D)   output moduleE) B) and C)
F) C) and D)

Question 6

The actual logic of the control circuit is performed by ____.

Accepted Answer

A)   physical relays
B)   internal relays
C)   contacts
D)   RAME) B) and C)
F) A) and D)

Question 7

Explain the mechanism by which the differential amplifier works.

Accepted Answer

An electronic device that is often used ...

Question 8

The ____ is used to program the CPU.

Accepted Answer

A)   I/O rack
B)   power supply
C)   tape deck
D)   loading terminalE) A) and B)
F) C) and D)

Question 9

What are some potential problems you might face when grounding equipment?

Accepted Answer

Ground is generally thought of as being ...

Question 10

PLCs are designed to be programmed with ____.

Accepted Answer

A)   ladder diagrams
B)   BASIC
C)   higher-order languages
D)   relaysE) A) and D)
F) None of the above

Question 11

PLCs were first used by the ____ industry in the late 1960s.

Accepted Answer

A)   railroad
B)   defense
C)   automotive
D)   steelE) C) and D)
F) B) and D)

Question 12

What are timers and counters?

Accepted Answer

Timers and counters are internal relays....

Question 13

The PLC recognizes only ____.

Accepted Answer

A)   push-buttons
B)   pressure switches
C)   open or closed contacts
D)   float switchesE) B) and C)
F) None of the above

Question 14

The current rating of most outputs can range from 0.5 to about ____ amperes, depending on the make of the controller and the type of output being used.

Accepted Answer

A)   one
B)   two
C)   three
D)   fiveE) A) and D)
F) A) and C)

Question 15

Describe the power supply of the PLC.

Accepted Answer

The function of the power supply is to l...

Question 16

The ____ is the "brains" of the PLC.

Accepted Answer

A)   power supply
B)   CPU
C)   I/O rack
D)   program loaderE) None of the above
F) A) and D)

Question 17

Electrical noise is such a problem in some installations that several manufacturers are using ____ instead of wires for connection to the I/O rack.

Accepted Answer

A)   transistors
B)   coaxial cables
C)   optical cables
D)   radio signalsE) B) and D)
F) A) and D)

Question 18

Highlighting a contact means that there is a ____ through that contact.

Accepted Answer

A)   complete circuit
B)   short circuit
C)   change of state
D)   troubleshooting elementE) None of the above
F) C) and D)

Question 19

An electronic device that is often used to help overcome the problem of induced noise is the ____.

Accepted Answer

A)   float switch
B)   LED
C)   MOV
D)   differential amplifierE) B) and C)
F) A) and C) D

Question 20

What are the advantages and disadvantages of controlling output with small relays?

Accepted Answer

One method of controlling the output is with small relays. The CPU controls the relay coil. The contacts connect the load to the line. The advantage of this type of output module is that it is not sensitive to whether the voltage is ac or dc and can control 120- or 24-volt circuits. The disadvantage is that it does contain moving parts that can wear. In this instance, the CPU is isolated from the external circuit by a magnetic field instead of a light beam.

Exam 16: Programmable Logic Controllers

A(n) ____ is connected across the ac input to help eliminate any voltage spikes that may occur.

Correct Answer
verified
B

The most popular way to isolate the CPU from the external circuit is through ____.

Correct Answer
verified

In the relay method of isolation, the CPU is isolated through the use of a(n) ____.

Correct Answer
verified

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

Correct Answer
verified

The ____ is used to connect the CPU to the load.

Correct Answer
verified

The actual logic of the control circuit is performed by ____.

Correct Answer
verified

Explain the mechanism by which the differential amplifier works.

Correct Answer
verified
An electronic device that is often used ...
View Answer

The ____ is used to program the CPU.

Correct Answer
verified

What are some potential problems you might face when grounding equipment?

Correct Answer
verified
Ground is generally thought of as being ...
View Answer

PLCs are designed to be programmed with ____.

Correct Answer
verified

PLCs were first used by the ____ industry in the late 1960s.

Correct Answer
verified

What are timers and counters?

Correct Answer
verified
Timers and counters are internal relays....
View Answer

The PLC recognizes only ____.

Correct Answer
verified

The current rating of most outputs can range from 0.5 to about ____ amperes, depending on the make of the controller and the type of output being used.

Correct Answer
verified

Describe the power supply of the PLC.

Correct Answer
verified
The function of the power supply is to l...
View Answer

The ____ is the "brains" of the PLC.

Correct Answer
verified

Electrical noise is such a problem in some installations that several manufacturers are using ____ instead of wires for connection to the I/O rack.

Correct Answer
verified

Highlighting a contact means that there is a ____ through that contact.

Correct Answer
verified

An electronic device that is often used to help overcome the problem of induced noise is the ____.

Correct Answer
verified
D

What are the advantages and disadvantages of controlling output with small relays?

Exam 16: Programmable Logic Controllers

A(n) ____ is connected across the ac input to help eliminate any voltage spikes that may occur.

Correct AnswerverifiedB

The most popular way to isolate the CPU from the external circuit is through ____.

Correct AnswerverifiedShow Answer

In the relay method of isolation, the CPU is isolated through the use of a(n) ____.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The ____ is used to connect the CPU to the load.

Correct AnswerverifiedShow Answer

The actual logic of the control circuit is performed by ____.

Correct AnswerverifiedShow Answer

Explain the mechanism by which the differential amplifier works.

Correct AnswerverifiedAn electronic device that is often used ...View AnswerShow Answer

The ____ is used to program the CPU.

Correct AnswerverifiedShow Answer

What are some potential problems you might face when grounding equipment?

Correct AnswerverifiedGround is generally thought of as being ...View AnswerShow Answer

PLCs are designed to be programmed with ____.

Correct AnswerverifiedShow Answer

PLCs were first used by the ____ industry in the late 1960s.

Correct AnswerverifiedShow Answer

What are timers and counters?

Correct AnswerverifiedTimers and counters are internal relays....View AnswerShow Answer

The PLC recognizes only ____.

Correct AnswerverifiedShow Answer

The current rating of most outputs can range from 0.5 to about ____ amperes, depending on the make of the controller and the type of output being used.

Correct AnswerverifiedShow Answer

Describe the power supply of the PLC.

Correct AnswerverifiedThe function of the power supply is to l...View AnswerShow Answer

The ____ is the "brains" of the PLC.

Correct AnswerverifiedShow Answer

Electrical noise is such a problem in some installations that several manufacturers are using ____ instead of wires for connection to the I/O rack.

Correct AnswerverifiedShow Answer

Highlighting a contact means that there is a ____ through that contact.

Correct AnswerverifiedShow Answer

An electronic device that is often used to help overcome the problem of induced noise is the ____.

Correct AnswerverifiedD

What are the advantages and disadvantages of controlling output with small relays?

Correct Answer
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B

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
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Correct Answer
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An electronic device that is often used ...
View Answer

Correct Answer
verified

Correct Answer
verified
Ground is generally thought of as being ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Timers and counters are internal relays....
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The function of the power supply is to l...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
D