Most proximity switches come equipped with an LED status indicator to:

Identify the choice that best completes the statement or answers the question. The application shown is a typical application for a:

Identify the choice that best completes the statement or answers the question. The symbol shown is that for a:

This is a .

For the program shown, instruction A represents an:

The address I:1/3 identifies an input module residing in slot of the PLC chassis.

The most common actuator for a reed switch is:

The symbol shown is that for a:

The symbol shown is that for a:

The symbol shown is that for a:

For the scan process shown, the input data is provided by the:

All servo motors:

The actual scan time is:

15. For the photoelectric sensor part 1 is the ___ and part 2 is the ___.

The Examine If Closed instruction:

The highlighted rungs in the program rung shown indicate:

The abbreviations NO (normally open) and NC (normally closed) represent the electrical state of switch contacts when:

The PLC program shown is a ____ type.

For the input module shown, the data stored in the word corresponding to the open switch would be ___ and that for the closed switch would be ___ respectively.

The two types of patterns used to accomplish the scan function are:

The memory organization of a PLC can be divided into two broad categories?

The address for the point on the I/O module shown would be:

The most likely module address for LS1 is:

Parallel connections of ladder logic are typically called:

The force applied to a strain gauge causes it to bend and change its:

The pushbutton symbol shown, would be classified as a(n):

A normally open limit switch is wired to an input module, and programmed using XIO instruction. The instruction will be true when:

The light sensor shown would be classified as a:

The __________ will account for most of the total memory of a given PLC system.

The scan is normally a sequential process of:

When a program rung consists of an output instruction only, the output would then be:

For the matrix limitation diagram shown, the maximum number of parallel rows allowed is:

35. A(n) converts electrical pulses applied to it into discrete rotor movements.

In the hardwired relay control circuit shown, when the switch is closed, CR coil is:

Each complete horizontal line of a ladder diagram is generally referred to as a(n):

This is a .

The output data is sent to the

The device represented by the symbol is a:

The symbol shown is that for a:

In the relay shown, the coil would be considered to be:

In the motor starter circuit shown, the main contacts M are:

With reference to the circuit and equivalent PLC program, when LS2 is actuated and LS1 is not:

Solenoid valves are available to control:

Rung 2 will be True whenever:

The status bit of switches and pushbuttons connected to a PLC are stored in the:

The ____ instructions always interpret a 1 status as true and a 0 status as false.

The purpose of the M contact shown in the circuit is to

For the programmed latching operation shown, which two instructions must have the same address?

The symbol shown is that for a:

When both LS1 and LS2 are actuated:

For the program shown, what is the address of the instruction associated with the pressure switch?

An actuator is a device that:

A thermocouple, when heated:

This is a ___________.

The symbol shown is that for a:

This is a ___________.

The Boolean equation for the logic represented in the ladder diagram can be expressed as:

The programmed latching relay instruction is retentive; that is, if the relay is latched, it will unlatch if power is lost and then restored.

Reed switches are activated by magnetism.

Ladder logic is a symbolic language.

An inductive proximity sensor is actuated by conductive and nonconductive materials.

Latching relays are used when it is necessary for contacts to stay open and/or closed, even though the coil is momentarily energized.

Fiber optic sensor systems are completely immune to all forms of electrical interference.

A selector switch is rotated to open and close contacts.

In a magnetic motor starter, the control circuit is required to handle the full load current of the motor.

If any input signal changes state very quickly, it is possible that the controller may never be able to detect the change.

In general, control relay contacts are designed to handle higher currents than contactors. True or False?

An internal output does not directly control an output field device. True or False?

The user program contains the logic that controls the machine operation.

When there is a True logic rung path, all parallel outputs in the rung become True. True or False?

A thru-beam sensor has the shortest sensing range of the three types of photo sensors. True or False?

A normally closed (NC) relay contact is closed when current flows through the coil. True or False?

LED light sources used in photoelectric sensors normally emit a continuous beam of light.

Changes to dual-in-line (DIP) package switch settings are made mainly during installation. True or False?

The memory organization of a PLC is often called a memory map.

Digital sensors are sometimes called discrete sensors because there are two discrete states: on or off.

Weight strain gauges operate by detecting small changes in temperature.

A through-beam photoelectric sensor is used to detect the light beam reflected from a target.

Proximity switches usually sense the presence or absence of a target by means of physical contact.

Coils are output instructions.

Both normally open and normally closed pushbuttons can be represented by the XIC or XIO instruction. True or False.

Hysteresis for sensors means that there is an on point and a separate off point.

An electromechanical relay uses electromagnetism to operate contacts.

Encoders are used in applications where positions have to be precisely determined.

All servo motors operate in open loop.

Contacts are output instructions.

Scan time varies with program content and length.

Strain gages are used for pressure/force sensing.

The rung condition and OTE instruction are false if no logical continuity path has been established.

In general, PLC output modules are designed to switch high current loads directly.

It takes the processor exactly the same amount of time to examine different types of instructions.

A small current flows through a solid-state proximity sensor even when the output is turned OFF.

The addressing format for inputs and outputs is standard for all PLC models.

There is more than one correct way to implement the ladder logic for a given control process. True or False.

Ultrasonic sensors operate using high-frequency light waves.

Misunderstanding the way the PLC scans a program can cause programming bugs.

This is a ________.

This is a ________.

A relay will usually have only one coil but a number of different contacts.

Most instructions require one word of memory.