AEA Amatrol's Sensor Logic Systems Practice Test

These questions are part of the practice quiz. Start practicing

• Which device is used to sense the position of a machine member?
• Energizing a fluid-power valve solenoid in ladder logic is commonly accomplished by using which component?
• Which device can be used to sense if a guard is in place and is a specific type of switch?
• Retroreflective sensors detect targets by which principle?
• Inductive proximity sensor sensing principle?
• How should a retroreflective sensor target be oriented relative to the beam?
• Which logic element describes two or more normally closed switches in parallel?
• Which type of sensor is commonly used to detect metal objects without contact?
• An example of using one limit switch to control multiple cylinders is....
• A SPST magnetic reed switch has how many wire connections?
• OR logic is formed by which arrangement?
• What is shown on a ladder diagram?
• What is the output of the Hall effect sensor when there is not a magnetic field present?
• What is the problem if a measurement across the solid-state relay terminals is normal, but a load is not operating?
• In sequencing, what device provides a time-based delay before a signal is sent forward?
• Which of the following is not a common electronic sensor?
• Which of the following is a rule for drawing a ladder diagram?
• What is the purpose of a power diagram when used with a ladder diagram?
• Which component closes the circuit to start the motor when a magnetic field is present?
• Capacitive proximity sensors are commonly used to detect which type of objects?
• NOT logic is formed by which device?
• Turning outputs on or off through relay contacts is called...
• What is the recommended method to synchronize cylinders with different bore and stroke?
• If a three-wire capacitive sensor has two terminals connected to the power supply, what should be connected to the output terminal?
• Which principle describes how a Hall effect sensor detects a magnetic object?
• How can a magnetic reed switch be returned to normally open state?
• Which of the following is an application of a relay?
• Which of the following materials can a capacitive sensor detect at the greatest distance?
• When a metallic object enters the sensing field of an inductive proximity sensor, what happens to the sensor energy state?
• What type of sensor should be used for metallic and nonmetallic objects?
• Which of the following is a function of a safety interlock switch?
• If the Hall effect sensor's amplifier is digital, the output will rapidly change from one state to the other when a magnetic field is sensed.
• A Hall effect sensor that senses only ____ can help avoid false triggering of the sensor.
• Which statement is true about a normally closed pushbutton?
• What is the name of the pushbutton on a directional control valve?
• For a sensor with a sinking output, what is the output voltage when the sensor is activated?
• Devices called... often serve as the brains of an automated machine.
• In automation, which device is described as the brains of an automated machine?
• Inductive proximity sensor detects which type of targets?
• Specular reflection is best described as mirror-like reflection. Which option reflects this concept?
• A circuit designed to turn off an output after a step is performed is called what?
• Two-wire sensors should typically be connected to which terminals?
• LS2 refers to which device?
• In a time-delay relay, which component is responsible for delaying the action?
• A three wire capacitive sensor uses two wires connected to the power source. What is the third wire connected to?
• Which of the following statements describes a limit switch?
• Which device is typically used to switch between automatic and manual modes on a machine?
• An on-delay timer relay's contacts will not change states until ...
• Which logic element describes a circuit with two normally open switches in series?
• What type of logic element uses a control relay?
• Which device is used to indicate the status of a circuit in a control panel?
• The electronic assembly that includes the circuitry and components that detect presence is called what?
• Which is the fifth type of electronic sensor, following inductive, capacitive, photoelectric, and Hall effect?
• What test can you do with a switch out of circuit?
• One method of de-energizing a seal-in circuit is to use...
• Which factors can affect the performance of a photoelectric sensor?
• Which of the following shows the connections for power devices?
• Which device is often described as the brains of an automated machine in the given material?
• An input device's electrical noise protection is called what?
• In ladder diagrams, which statement about parallel wiring is true?
• Controlling two cylinders that are not attached to the same machine part requires....
• An example of memory logic by a control relay is
• Which statement about capacitive sensors is true?
• Which measure helps reduce startup overheating in centrifugal air compressors?
• When testing a control relay, after isolating it from the circuit, what is the next step?
• Which type of sensor should be used to detect both metallic and nonmetallic objects?
• Which is NOT a component of a time-delay relay?
• When the machine is in manual mode, which mode should be locked out to prevent unintended automatic operation?
• Two normally closed push buttons wired in parallel implement which type of logic?
• A capacitive sensor senses presence using which principle?
• Why is optical isolation needed for an input device?
• Two normally open switches in series describe which logic element?
• Devices consisting of a glass tube containing two small ferromagnetic metal reeds are called?
• The manual control of cylinders through pushbuttons is called...
• An inductive proximity sensor can detect metallic and non-metallic objects.
• Ladder diagrams primarily illustrate what?
• Which of the following is not an advantage of electronic sensors?
• Which of the following would be considered as simple, relatively inexpensive, and easy to install?
• What term describes the slow, controlled movement of a cylinder using pushbuttons?
• Which mode is usually used for machine setup and maintenance?
• Which element describes two or more normally closed switches in series?
• Capacitive sensors can detect which material at the greatest distance?
• The magnetic reed switch is a fast operation, single-pole, single-throw switch with a .... contact.
• Which sensor outputs a voltage when a magnetic field is present?
• Which device is commonly used to sense the end-of-travel of a machine part and trigger a control action?
• What is the primary advantage of using a magnetic reed switch in simple sensing applications?
• A stop pushbutton is basically just a
• How many limit switches are needed if the cylinders to be synchronized are attached to the same machine member?
• A time-delay relay is used to perform a cylinder swell in which machine?
• Which of the following describes how electronic sensors differ from limit switches?
• In ladder diagrams, which statement is true?
• What material can an inductive proximity sensor sense?
• Which quantity does a Hall effect sensor sense?
• A control circuit that uses limit switches to sequence a series of events is called what?
• Which statement best describes a difference between electronic sensors and limit switches?
• The button located on a Directional control valve is called?
• A sinking output NPN sensor energizes and its output voltage is what?
• Electronic sensors usually use a transistor output as the .... mechanism of the sensor.
• Which element describes two normally closed switches in series?
• In ladder diagrams, which component is typically considered an input device?
• To avoid seriously overheating the motor on startup, it is recommended that ...
• How should you read a ladder diagram?
• Which diagram shows the power connections for devices in a control circuit?
• What device is used to switch a machine from automatic to manual mode?
• The transistor providing a high signal at its output when the sensor is energized, or has detected the presence of an object.
• In the two limit switch control method, which machine is typically used as the example?
• What happens to the output of an inductive proximity sensor when a metal object is in the sensing field?
• An example of a manually operated single cycle reciprocation circuit is a __________.
• Given multiple cylinders of different bore and stroke, which would be the best method to synchronize them?
• An inductive proximity sensor uses the principle of which to sense metal objects?
• Regarding photoelectric sensor performance, which statement is true?
• Which of the following is not a component of a ladder diagram?
• Which device is described as a fast-acting, single-pole, single-throw switch with NO contact?
• On a ladder diagram, what are the electrical wires that connect the circuit called?
• What device provides the means by which electrical circuits control pneumatic or hydraulic systems?
• In a relay, which component is typically responsible for providing the actual electrical path that is opened or closed to control the load?
• The ______ timer operates opposite to the on-delay timer.
• A coil is considered to be a...?
• In a control circuit, what does a yellow indicator lamp typically signify?
• Outputs on a ladder diagram are wired in parallel with each other. In ladder logic, if outputs are connected so that multiple paths allow current, this arrangement is described as?
• A limit switch used to sense if the guard is in place on a machine is called ....
• Which materials conduct magnetic lines of force very well?
• When a switch is removed from a circuit, what diagnostic test is recommended?
• A two-wire sensor is connected to which parts of the circuit?
• Which of the following is an element of control logic?
• Which of the following is not a component of a relay?
• What is the purpose of the manual override button on a solenoid-operated pneumatic valve?
• Which category of materials conducts magnetic lines of force properly, including aluminum and platinum?
• Two normally open switches in series implement which logic operation?
• How should a flat target be oriented with respect to a retro-reflective photoelectric sensor's beam to trigger its contacts?
• Which machine example demonstrates using one limit switch to control multiple cylinders?
• Fully automated machines require which type of reciprocation circuit?
• Which item completes the common set of five electronic sensors: inductive, capacitive, photoelectric, Hall effect, and?
• It is standard practice in industry to carry the flow of electricity to a solenoid through
• Which sensor type uses emission and detection of light to sense presence?
• What is one key difference between electronic sensors and limit switches?
• Which statement about the purpose of a safety interlock switch?
• What is the status of the NPN transistor when the output voltage is zero volts?
• Where are input devices located in a ladder diagram?
• The dielectric constant of an object affects capacitive sensing; therefore, the sensing distance is governed by the object's
• In capacitive sensing, the distance to detect an object is primarily influenced by the object's
• Which logic element uses a control relay?
• Two normally closed pushbuttons wired in parallel implement which logic?
• Which type of reflection occurs when light strikes a highly polished surface and reflects at the same angle as it strikes the surface?
• Which statement describes two normally open switches in series?
• What is measured when testing a Hall effect sensor as the target moves?
• In a circuit with a Hall effect sensor and motor, which condition describes the status if no magnetic field is present to close the sensor and start the motor?
• Which quantity can be tested with a digital multimeter while the circuit is powered?
• Which of the following is typically considered an output device in ladder logic?
• Which term describes the arrangement that shows the electrical power connections for devices in a control system?
• Magnetic reed switches are used in which type of circuit?
• Devices commonly described as the brains of an automated machine are called?
• The Hall effect sensor uses the principle of... to sense the presence of a magnetic object.
• When time-delay relays are used in time-driven sequencing, they basically take the place of ....
• In the Hall effect circuit, what condition prevents the motor from starting?
• To minimize triggering by sunlight, photoelectric sensors typically use which type of light?
• Which of the following is categorized as a single pole-single throw?
• An inductive proximity sensor uses the principle of .... to sense the presence of a metallic object.
• Which statement describes the function of a limit switch in automation?
• An inductive proximity sensor detects metallic objects by which principle?
• Ladder diagrams are read from left to right with the input devices on which side?
• In capacitive sensing, objects with higher what constants are sensed at greater distances?
• Which magnetic reed switch requires a stronger magnetic field to energize the switch?
• Which component is often chosen for an easy-to-install magnetic sensing solution with a normally open output?
• A photoelectric sensor uses the principle of ... to activate it.
• NOT logic is formed by which of the following?
• The transistor output in electronic sensors typically acts as the .... mechanism?
• Capacitive sensors are able to detect what types of material?
• In relay logic, what function does a seal-in circuit perform?
• The photoelectric sensor uses the principle of which to sense the presence of an object?
• Which statement best describes an advantage of electronic sensors?
• Which of the following is not a basic guideline to follow when working with manual control circuits?
• In a ladder diagram, a coil is a representation of what type of device?
• What is the primary function of a seal-in circuit in relay logic?
• Which statement describes the behavior of a Hall effect sensor with a digital amplifier as a magnetic field is detected?
• Which material has the shortest detection distance range for a capacitive sensor?
• Optical isolation in input devices provides electrical noise protection by
• Not a component of a limit switch?
• Which statement best describes a reed switch?
• One reason why machines use multiple cylinders operating together is to...