412

c. both a and b

Generally, programmable controllers are designed to ___ when the CPU fault lamp is energized. Select one: a. de-energize all outputs b. display an error message c. both a and b d. neither a nor b

d. Any of these

___ can be connected to the input terminals of a programmable controller. Select one: a. A foot switch b. The NC contacts of a timing relay c. A pushbutton switch d. Any of these

d. any of these

For a PLC, high inrush current and transients can ___. Select one: a. cause false signals within the system b. shorten its operating life c. destroy the outputs d. any of these

a. normally-closed

NOT logic utilizes ___ switch contacts for connection to programmable controller input terminals. Select one: a. normally-closed b. normally-open

b. DMM

When troubleshooting programmable controller modules, voltage can be measured using a ___. Select one: a. vibrating voltage tester (Wiggy®) b. DMM c. either a or b d. neither a nor b

a. is

A PLC ___ capable of directing a VFD to cause a motor to turn at varying speeds. Select one: a. is b. is not

a. I, II & III

A ___ is a type of programmable controller. I. PAC II. PLR III. PLC Select one: a. I, II & III b. II & III only c. II only d. III only e. I only

a. output to an input

A closed loop operation is an operation that has feedback from a programmable controller ___. Select one: a. output to an input b. input to an output

a. discrete

A furniture plant is an example of ___ manufacturing. Select one: a. discrete b. process

b. normally-open

OR logic utilizes ___ switch contacts for connection to programmable controller input terminals. Select one: a. normally-closed b. normally-open

a. is not

Programmable controller input and output address identification ___ standardized throughout the industry. Select one: a. is not b. is

a. can

Programmable controllers ___ be configured in a system using a personal computer. Select one: a. can b. can not

a. do

Programmable controllers ___ contain a battery backup. Select one: a. do b. do not

c. either a or b

Programmable controllers may be ___. Select one: a. connected through communication ports to other devices or controllers b. used as stand-alone control devices c. either a or b d. neither a nor b

d. all of these

Programmable controllers permit changes in ___. Select one: a. safety features b. circuit operation c. programming d. all of these

a. only one end

Shielded cable should be grounded at ___ of the cable. Select one: a. only one end b. both ends

d. all of these

Various manufacturers refer to a PLR as a ___. Select one: a. nano-PLC b. smart relay c. micro-PLC d. all of these

e. II & III only

When AND logic is utilized in a control circuit, the output (load) is de-energized when ___. I. both inputs A and B are activated II. neither input A nor B is activated III. either input A or B is activated Select one: a. III only b. II only c. I & II only d. I only e. II & III only

c. both a and b

For a programmable controller, ___ are used to assign addresses to inputs, outputs, timers, and other internal and external components. Select one: a. letters b. numbers c. both a and b d. neither a nor b

c. discrete

For a programmable controller, the most common I/Os are ___. Select one: a. data b. onboard c. discrete d. none of these

e. III only

For programmable controllers, the disable command is used to ___ while troubleshooting the system. I. turn an output device ON or OFF II. open or close an input device III. prevent an output device from operating Select one: a. I only b. II and III only c. II only d. I and II only e. III only

d. I and II only

For programmable controllers, the force command is used to ___ while troubleshooting the system. I. turn an output device ON or OFF II. open or close an input device III. prevent an output device from operating Select one: a. I only b. II and III only c. II only d. I and II only e. III only

c. I only

When AND logic is utilized in a control circuit, the output (load) is energized when ___. I. both inputs A and B are activated II. neither input A nor B is activated III. either input A or B is activated Select one: a. III only b. II only c. I only d. I & II only e. I & III only

e. I & III only

When NOR logic is utilized in a control circuit, the output (load) is de-energized when ___. I. both inputs A and B are activated II. neither input A nor B is activated III. either input A or B is activated Select one: a. III only b. II only c. I & II only d. I only e. I & III only

a. is

When NOT logic is utilized in a control circuit, the output (load) is de-energized when the input ___ activated. Select one: a. is b. is not

b. II only

When OR logic is utilized in a control circuit, the output (load) is de-energized when ___. I. both inputs A and B are activated II. neither input A nor B is activated III. either input A or B is activated Select one: a. III only b. II only c. I & II only d. I only e. I & III only

d. a thermostat

When connected to a programmable controller, ___ is a data input. Select one: a. a pushbutton switch b. relay contacts c. a limit switch d. a thermostat

c. either a or b

When manually operating an input to a programmable controller under test, the input should be operated using a ___. Select one: a. wooden stick b. nonconductive device c. either a or b d. neither a nor b

c. address

When programming input and output devices for a programmable controller, each device must be assigned a(n) ___ to link these to processor and data files. Select one: a. multiplex b. color code c. address d. any of these

b. individually

When testing input devices for a programmable controller, they should be tested ___. Select one: a. as a group b. individually

f. I or II only

When testing output devices, the programmable controller should be in ___ mode. I. TEST II. PROGRAM III. RUN Select one: a. I or III only b. II or III only c. II only d. I only e. III only f. I or II only

b. programmed

When using a programmable controller to control a conveyor system, the memory contacts for START PB switches are ___. Select one: a. hardwired b. programmed

a. input

Where used in a control circuit, float switch terminals are connected to the ___ terminals on a programmable controller. Select one: a. input b. output

b. output

Where used in a control circuit, horns and sirens are connected to the ___ terminals on a programmable controller. Select one: a. input b. output

b. output

Where used in a control circuit, indicator lights are connected to the ___ terminals on a programmable controller. Select one: a. input b. output

a. external timing relays

The use of programmable controllers eliminates the need for ___. Select one: a. external timing relays b. power supplies c. inputs d. outputs

b. process

A soft drink bottling plant is an example of ___ manufacturing. Select one: a. discrete b. process

c. PLC

A(n) ___ is a solid-state control device that is programmed and reprogrammed automatically to control an industrial process or machine. Select one: a. PNP b. NPN c. PLC d. SCR

b. programmed

All PLCs include inputs, outputs, timers, and counters. These are ___ into the control circuit. Select one: a. wired b. programmed

a. normally-closed

NAND logic utilizes ___ switch contacts for connection to programmable controller input terminals. Select one: a. normally-closed b. normally-open

a. can

PLCs ___ be programmed and reprogrammed. Select one: a. can b. can not

d. Programmable Logic Relay

PLR is an abbreviation for ___. Select one: a. Process Layout Requirements b. Periodic Linear Reactor c. Product Limiting Response d. Programmable Logic Relay

d. power supply

The ___ section of a programmable controller provides the voltage required for internal operation and charging the internal battery. Select one: a. programming b. input/output c. processor d. power supply

d. all of these

The processor section of a programmable controller organizes all control activity by ___. Select one: a. controlling the outputs b. receiving inputs c. performing logical decisions d. all of these

c. three

There are ___ basic I/O symbols used in the programming diagrams for programmable controllers. Select one: a. an unlimited number of b. eight c. three d. sixteen

a. input

To operate properly, the programmable controller input module should supply power to the ___ devices. Select one: a. input b. output

a. shielded

To reduce electrical noise, sensitive analog and digital input devices are connected to a programmable controller with ___ cable. Select one: a. shielded b. flat c. integrated gas spacer d. any of these